Samacheer Kalvi 11th Computer Applications Guide Chapter 1 Introduction to Computers

Tamilnadu State Board New Syllabus Samacheer Kalvi 11th Computer Applications Guide Pdf Chapter 1 Introduction to Computers Text Book Back Questions and Answers, Notes.

Tamilnadu Samacheer Kalvi 11th Computer Applications Solutions Chapter 1 Introduction to Computers

11th Computer Applications Guide Introduction to Computers Text Book Questions and Answers

Part I

Choose The Correct Answers

Question 1.
First generation computers used _________.
a) Vacuum tubes
b) Transistors
c) Integrated circuits
d) Microprocessors
Answer:
a) Vacuum tubes

Question 2.
Name the volatile memory _________.
a) ROM
b) PROM
c) RAM
d) EPROM
Answer:
c) RAM

Question 3.
Identify the output device _________.
a) Keyboard
b) Memory
c) Monitor
d) Mouse
Answer:
c) Monitor

Question 4.
Identify the- input device _________.
a) Printer
b) Mouse
c) Plotter
d) Projector
Answer:
b) Mouse

Question 5.
_________ Output device is used for printing building plan, flex board, etc.
a) Thermal printer
b) Plotter
c) Dot matrix
d) inkjet printer
Answer:
b) Plotter

Question 6.
In ATM machines, which one of the following is used _________.
a) Touch Screen
b) Speaker
c) Monitor
d) Printer
Answer:
a) Touch Screen

Question 7.
When a system restarts, which type of booting is used?
a) Warm booting
b) Cold booting
c) Touch boot
d) Real boot
Answer:
a) Warm booting

Question 8.
Expand POST _________.
a) Post on self Test
b) Power on Software Test
c) Power on Self Test
d) Power on Self Text
Answer:
c) Power on Self Test

Question 9.
Which one of the following is the main memory?
a) ROM
b) RAM
c) Flash drive
d) Hard disk
Answer:
b) RAM

Question 10.
Which generation of computer used IC’s?
a) First
b) Second
c) Third
d) Fourth
Answer:
c) Third

Part – II

Short Answers

Question 1.
What is a computer?
Answer:
It is an electronic device that processes the input according to the set of instructions provided to it and gives the desired output at a very fast rate.

Question 2.
Distinguish between data and information.
Answer:
Data:

• It is an unprocessed collection of raw facts.
• It will not give any meaning.

Information:

• It is a collection of processed facts from which conclusion may be drawn.
• It convey meaning.

Question 3.
What are the components of a CPU?
Answer:
The CPU has three components. They are:

1. Control Unit
2. Arithmetic and Logic Unit
3. Memory Unit.

Question 4.
What is the function of an ALU?
Answer:
The ALU performs operations such as addition, subtraction, multiplication, division and logical operations.

Question 5.
Write the functions of control unit.
Answer:
The control unit controls the flow of data between the CPU, memory and I/O devices. It also controls the entire operation of a computer.

Question 6.
What is the function of memory?
Answer:
The memory is used to store the data for processing and for future reference.

Question 7.
Differentiate Input and output unit.
Answer:

1. Input unit is used to feed any form of data to the computer for further processing.
2. Output unit conveys information to users in an understandable form.

Question 8.
Distinguish Primary and Secondary memory.
Answer:

1. The primary memory is used to temporarily store the programs and data to execute currently. It is volatile in nature.
2. The secondary memory is used to store the data permanently. It is non-volatile.

Part – III

Explain In Brief

Question 1.
What are the characteristics of a computer?
Answer:
Characteristics of Computer:

1. Speed : Very high speed i.e. more than 10^-12 second.
2. Accuracy : Very high accuracy even with high speed.
3. Storage : Computer can store any volume of data for a long time.
4. Diligence : Computer can work for hours without any break and creating error. It is suitable for repetitive jobs.
5. Versatility : Computer can perform variety of task.
6. Power of remembering : It can remember data for us.
7. No IQ : Computer itself having no thinking power. It works based on the given instruction.
8. No Feeling : Computer does not have emotions, knowledge, experience, feeling.

Question 2.
Write the applications of computer.
Answer:
The various applications of computers are:

1. Business – It is used in. business for Payroll preparation, Sales analysis, Budgeting, Financial forecasting,
2. Managing employees database and Maintenance of stocks etc.
3. Education – It is used for online teaching with CBTs and WBTs.
4. Marketing – It is used for Selling & Promoting product.
5. Banking – It is used for Home banking with internet, ATM etc.
6. Insurance – It is used to transact insurance operation.
7. Communication – Email, chatting etc,
8. Health Care – ECG’s, radiotherapy like monitoring devices.
9. Military – It builds the links between the soldiers and commanders through the satellite.
10. Engineering Design – Machine design, building plan, Interior design etc.

Question 3.
What is an input device? Give two examples.
Answer:

1. Input device is used to feed any form of data to the computer for further processing.
2. Keyboard – To feed text, numbers, special characters etc..
3. Mouse – Pointing device i.e. to select an item on the screen.
4. Bar Code Reader – Scans the information on the bar codes transmits to the computer.

Question 4.
Name any three output devices.
Answer:

1. Monitor – To display the information.
2. Printer – It is used to print the information on papers.
3. Plotter – It is used to produce graphical output like building plan on paper.
4. Speaker – It produces voice output.

Question 5.
Differentiate optical and Laser mouse.
Answer:
Optical Mouse:

• It uses light source instead of ball to judge the motion of the pointer.
• It is less sensitive towards surface.

Laser Mouse:

• Laser Mouse uses Laser Light.
• It is highly sensitive and able to work on any hard surface.

Question 6.
Write short note on impact printer.
Answer:
The impact printers print with striking of hammers or pins on ribbon. These printers can print on multi-part papers. Dot Matrix printers and Line matrix printers are impact printers.

Question 7.
Write the characteristics of sixth generation.
Answer:
The characteristics of sixth generation computers are:

1. Parallel and Distributed computing
2. Computers have become smarter, faster and smaller
3. Development of robotics
4. Natural Language Processing
5. Development of Voice Recognition Software.

Question 8.
Write the significant features of monitor.
Answer:
Monitor is the most commonly used output device to display the information. Pictures on a monitor are formed with picture elements called Pixels.

Monitors may either be Monochrome or can be color.

Types of monitors:

• CRT (Cathode Ray Tube)
• LCD (Liquid Crystal Display)

Part – IV

Explain In Detail

Question 1.
Explain the basic components of a computer with a neat diagram.
Answer:
The computer is the combination of hardware and software. Hardware is the physical component of a computer while software is the set of programs or instructions. Both hardware and software together make the computer system to function. Every task given to a computer follows an Input- Process- Output Cycle (IPO cycle).

The functional components of a computer:
(i) Input Unit : Input unit is used to feed any form of data to the computer. Example: Keyboard, mouse, etc.

(ii) Central Processing Unit: CPU is the major component which interprets and executes software instructions. It also controls the operation of all other components such as memory, input and output units. The CPU has three components which are Control unit, Arithmetic and logic unit (ALU) and Memory unit.

(iii) Arithmetic and Logic Unit : The ALU is. a part of the CPU where various computing functions are performed on data. The ALU performs arithmetic operations such as addition, subtraction, multiplication, division and logical operations.

(iv) Control Unit : The control unit controls the flow of data between the CPU, memory and I/O devices. It also controls the entire operation of a computer.

(v) Output Unit: An Output Unit is any hardware component that conveys information to users in an understandable form. Example: Monitor, Printer etc.

(vi) Memory Unit : The Memory Unit is of two types which are primary memory and secondary memory. The primary memory is used to temporarily store the programs and data when the instructions are ready to execute.

The secondary memory is used to store the data permanently. The Primary Memory is volatile, that is, the content is lost when the power supply is switched off. The Random Access Memory (RAM) is an example of a main memory.

The Secondary memory is non volatile, that is, the content is available even after the power supply is switched off. Hard disk, CD-ROM and DVD ROM are examples

Question 2.
Discuss the various generations of computers
Answer:

Question 3.
Explain the following
a) Inkjet Printer
b) Multimedia projector
c) Bar code / QR code Reader
Answer:
a) Inkjet Printers: Inkjet Printers use colour cartridges which combined Magenta, Yellow and Cyan inks to create color tones. A black cartridge is also used for monochrome output. Inkjet printers work by spraying ionised ink at a sheet of paper.

The speed of Inkjet printers generally range from 1-20 PPM (Page Per Minute). They use the technology of firing ink by heating it so that it explodes towards the paper in bubbles. An Inkjet printer can spread millions of dots of ink at the paper every single second.

b) Multimedia Projectors : Multimedia projectors are used to produce computer output on a big screen. These are used to display presentations in meeting halls or in classrooms.

c) Bar Code Reader: A Bar code is a pattern printed in lines of different thickness. The Bar code reader scans the information on the bar codes transmits to the Computer for further processing. The system gives fast and error free entry of information into the computer.

QR Code Reader : The QR (Quick response) code is the two dimension bar code which can be read by a camera and processed to interpret the image

11th Computer Applications Guide Introduction to Computers Additional Important Questions and Answers

Part A

Choose The Correct Answers:

Question 1.
Who is called as a father of computer?
a) William Oughtred
b) John Von Numan
c) Charless Babbage
d) Herman Hollerith
Answer:
c) Charless Babbage

Question 2.
The Analytical Engine was invented in the year _______.
a) 1837
b) 1937
c) 1847
d) 1873
Answer:
a) 1837

Question 3.
The Analytical Engine contained _______.
a) ALU
b) Basic flow control
c) Integrated memory
d) All the above
Answer:
d) All the above

Question 4.
Which led to the development of general purpose computers?
a) Napier’s Bone
b) Analytical Engine
c) Slide Rule
d) None of these
Answer:
b) Analytical Engine

Question 5.
Which computing method was slow and prone to errors?
a) computerized
b) manual
c) both A and B
d) Neither A nor B
Answer:
b) manual

Question 6.
_______ is the first known calculating device.
a) Napier’s Bone
b) Slide Rule
c) Punched Card
d) Abacus
Answer:
d) Abacus

Question 7.
The Abacus was used for _______ operation,
a) Addition
b) Multiplication
c) Division
d) All the above
Answer:
a) Addition

Question 8.
Based on various stages of development, computers can be categorized in to ________ generations.
a) 3
b) 4
c) 5
d) 6
Answer:
d) 6

Question 9.
The period of first generation is ________.
a) 1942 – 1955
b) 1955 – 1964
c) 1964- 1975
d) 1975-1980
Answer:
a) 1942 – 1955

Question 10.
The period of second generation is ________.
a) 1942- 1955
b) 1955- 1964
c) 1964 – 1975
d) 1975-1980
Answer:
b) 1955- 1964

Question 11.
The period of third generation is ________.
a) 1942- 1955
b) 1955- 1964
c) 1964 – 1975
d) 1975 – 1980
Answer:
c) 1964 – 1975

Question 12.
The period of fourth generation is _______.
a) 1942- 1955
b) 1955- 1964
c) 1964- 1975
d) 1975- 1980
Answer:
d) 1975- 1980

Question 13.
The period of fifth generation is _______.
a) 1980 – till date
b) 1955 – 1964
c) 1964 – 1975
d) 1975-1980
Answer:
a) 1980 – till date

Question 14.
The period of sixth generation is _______.
a) 1980 – till date
b) 1975 – 1980
c) 1964 – 1975
d) In future
Answer:
d) In future

Question 15.
_______ is a first generation computer.
a) ENIAC
b) EDVAC
c) UNIVAC
d) All the above
Answer:
d) All the above

Question 16.
_______ is a second generation computer.
a) IBM 1401
b) IBM 1620
c) UNIVAC 1108
d) All the above
Answer:
d) All the above

Question 17.
_______ is a third generation computer.
a) IBM 360 series
b) Honey well 6000 series
c) IBM 1620
d) Both A and B
Answer:
d) Both A and B

Question 18.
The weight of ENIAC was _______ tons.
a) 27
b) 37
c) 28
d) 17
Answer:
a) 27

Question 19.
The size of ENIAC was _______.
a) 8 feet x 100 feet x 3 feet
b) 3 feet x 100 feet x 8 feet
c) 100 feet x 8 feet x 3 feet
d) 8 feet x 3 feet x 100 feet
Answer:
a) 8 feet x 100 feet x 3 feet

Question 20.
The ENIAC conusmed _______ watts of power.
a) 150
b) 100
c) 1500
d) 15
Answer:
a) 150

Question 21.
The main component used in first generation computer is _______.
a) Transistors
b) Integrated Circuits
c) Vacuum Tube
d) Micro processor
Answer:
c) Vacuum Tube

Question 22.
The main component used in second generation computer is _______.
a) Transistors
b) Integrated Circuits
c) Vacuum Tube
d) Micro processor
Answer:
a) Transistors

Question 23.
The main component used in third generation computer is _______.
a) Transistors
b) Integrated Circuits
c) Vacuum Tube
d) Micro processor
Answer:
b) Integrated Circuits

Question 24.
The main component used in fourth generation computer is _______.
a) Transistors
b) Integrated Circuits
c) Vacuum Tube
d) Microprocessor
Answer:
d) Microprocessor

Question 25.
The main component used in fifth generation computer is _______.
a) Transistors
b) Integrated Circuits
c) Ultra Large Scale Integration
d) Micro processor
Answer:
c) Ultra Large Scale Integration

Question 26.
The first operating system was developed during _______ generation of computers.
a) first
b) second
c) third
d) fourth
Answer:
b) second

Question 27.
Batch processing and Multiprogramming was developed during _______ generation of computers.
a) first
b) second
c) third
d) fourth
Answer:
b) second

Question 28.
_______ language was used in first generation computer.
a) Machine
b) Assembly
c) High Level
d) English
Answer:
a) Machine

Question 29.
_______ language was used in second generation computer.
a) Machine
b) Assembly
c) High Level
d) Both A and B
Answer:
d) Both A and B

Question 30.
_______ language was used in third generation computer.
a) Machine
b) Assembly
c) High Level
d) English
Answer:
c) High Level

Question 31.
Micro computer series such as IBM and APPLE were developed during _______ generation.
a) Sixth
b) Fifth
c) Fourth
d) None of these
Answer:
c) Fourth

Question 32.
Portable computers were introduced in ______ generation.
a) Third
b) Fifth
c) Fourth
d) None of these
Answer:
c) Fourth

Question 33.
_______ generation computer can recognize Images and Graphics.
a) Sixth
b) Fifth
c) Fourth
d) Second
Answer:
b) Fifth

Question 34.
Artificial Inegelligence introduced in _______ generation.
a) Third
b) Fifth
c) Fourth
d) Second
Answer:
b) Fifth

Question 35.
Expert Syetem introduced in _________ generation.
a) Third
b) Fifth
c) Fourth
d) Second
Answer:
b) Fifth

Question 36.
_______ generation computers are capable of solving complex problems including decision making and logical reasoning.
a) Third
b) Fifth
c) Fourth
d) Second
Answer:
b) Fifth

Question 37.
Parallel processing introduced in _______ generation.
a) Third
b) Fifth
c) Fourth
d) Second
Answer:
b) Fifth

Question 38.
The ENIAC was invented by _______.
a) J.Presper
b) John Mauchly
c) Both A and B
d) Charless Babbage
Answer:
c) Both A and B

Question 39.
The ENIAC was developed at _______.
a) University of Pennsylvania
b) Oxford University
c) Microsoft
d) None of these
Answer:
a) University of Pennsylvania

Question 40.
The ENIAC was developed in the year _______.
a) 1947
b) 1943
c) 1942
d) 1843
Answer:
b) 1943

Question 41.
The ENIAC used _______ number of vacuum tubes,
a) 19000
b) 18000
c) 28000
d) 18900
Answer:
b) 18000

Question 42.
_______ is a component of Artificial Intelligence.
a) Natural Language Processing
b) Parallel Processing
c) both A and B
d) None of these
Answer:
a) Natural Language Processing

Question 43.
_______ provides the ability to develop the computer program to understand human language.
a) Natural Language Processing
b) Parallel Processing
c) both A and B
d) None of these
Answer:
a) Natural Language Processing

Question 44.
The term “computer” is derived from the word _______.
a) compute
b) calculate
c) process
d) None of these
Answer:
a) compute

Question 45.
The term “compute” means _______.
a) computer
b) calculate
c) process
d) None of these
Answer:
b) calculate

Question 46.
Before 19th century, the person who performs calculation is called as _______.
a) Computer
b) Calculator
c) Abacus
d) None of these
Answer:
a) Computer

Question 47.
_______ is defined as an unprocessed collection of raw facts.
a) information
b) datum
c) data
d) None of these
Answer:
c) data

Question 48.
_______ will not give meaning.
a) information
b) datum
c) data
d) None of these
Answer:
c) data

Question 49.
_______ is a collection of facts from which conclusions may be drawn.
a) information
b) datum
c) data
d) None of these
Answer:
a) information

Question 50.
_______ is a processed fact.
a) information
b) datum
c) data
d) None of these
Answer:
a) information

Question 51.
A set of instructions are called _______.
a) pseudo code
b) program
c) walk through
d) all the above
Answer:
b) program

Question 52.
The _______ is the combination of hardware and software.
a) computer
b) analytical engine
c) calculator
d) all the above
Answer:
a) computer

Question 53.
_______ is the physical component of a computer.
a) software
b) hardware
c) freeware
d) Malware
Answer:
b) hardware

Question 54.
_______ is the set of programs or instructions.
a) software
b) hardware
c) freeware
d) Malware
Answer:
a) software

Question 55.
IPO menas _______.
a) Input-Process-Output
b) Intelligence Process Output
c) Integral Program Output
d) Internet Process Outcome
Answer:
a) Input-Process-Output

Question 56.
Every task given to the computer follows _______ cycle.
a) Input-Process-Output
b) Output-Process-Input
c) Process-Output-Input
d) Input-Output-Process
Answer:
a) Input-Process-Output

Question 57.
_______ unit is used to feed any form of data to the computer.
a Process
b) Arithmetic and Logic
c) Input
d) None of these
Answer:
c) Input

Question 58.
_______ of a computer interprets and executes software instructions.
a) Input unit
b) Main Memory
c) Central Process Unit
d) Secondary Memory
Answer:
c) Central Process Unit

Question 59.
_______ control the components such as memory, input and output units.
a) Input unit
b) Main Memory
c) Central Process Unit
d) Secondary Memory
Answer:
c) Central Process Unit

Question 60.
The CPU has _______ components.
a) 4
b) 3
c) 5
d) 2
Answer:
b) 3

Question 61.
_______ is a component of CPU.
a) Control unit
b) ALU
c) Memory unit
d) All the above
Answer:
d) All the above

Question 62.
In _______ unit, various computing functions are performed on data.
a) Control unit
b) ALU
c) Memory unit
d) All the above
Answer:
b) ALU

Question 63.
The result of an operation is stored in _______ of CPU.
a) Secondary storage
b) Main memory
c) Internal memory
d) None of these
Answer:
c) Internal memory

Question 64.
The _______ operations of ALU promote the decision-making ability of a computer,
a) arithmetic
b) logical
c) relational
d) increment/decrement
Answer:
b) logical

Question 65.
_______ controls the entire operation of a computer.
a) Control unit
b) ALU
c) Memory unit
d) All the above
Answer:
a) Control unit

Question 66.
The _______ unit controls the flow of data between the CPU, memory and I/O devices.
a) Control unit
b) ALU
c) Memory unit
d) All the above
Answer:
a) Control unit

Question 67.
_______ unit is any hardware component that conveys information to user in an understandable form.
a) Input unit
b) Output unit
c) Memory unit
d) All the above types.
Answer:
b) Output unit

Question 68.
The memory is of _______ types.
a) 2
b) 3
c) 4
d) 5
Answer:
a) 2

Question 69.
The _______ memory is used to temporarily store the programs and data when the instructions are ready to execute.
a) Primary memory
b) Output unit
c) Secondary memory
d) All the above
Answer:
a) Primary memory

Question 70.
The _______ memory is used to store the data permanently.
a) Primary memory
b) Output unit
c) Secondary memory
d) All the above
Answer:
c) Secondary memory

Question 71.
The _______ memory is volatile.
a) Primary memory
b) Output unit
c) Secondary memory
d) All the above
Answer:
a) Primary memory

Question 72.
In _______ memory, the content is lost when the power supply is switched off.
a) Primary memory
b) RAM
c) Secondary memory
d) Either A or B
Answer:
d) Either A or B

Question 73.
_______ is an example of a main memory.
a) ROM
b) PROM
c) RAM
d) EPROM
Answer:
c) RAM

Question 74.
The _______ memory is non-volatile.
a) Primary memory
b) Output unit
c) Secondary memory
d) All the above
Answer:
c) Secondary memory

Question 75.
_______ memory, the content is available even after the power supply is switched off.
a) Primary memory
b) RAM
c) Secondary memory
d) Either A or B
Answer:
c) Secondary memory

Question 76.
_______ is an example of a secondary memory.
a) CD-ROM
b) DVD-ROM
c) Hard disk
d) All the above
Answer:
d) All the above

Question 77.
_______ is the most common input device.
a) scanner
b) keyboard
c) bar code reader
d) none of these
Answer:
b) keyboard

Question 78.
The keyboard layout is derived from the keyboard of original _______.
a) typewriter
b) key punching machine
c) touch screen
d) None of these
Answer:
a) typewriter

Question 79.
_______ is a pointing device.
a) scanner
b) keyboard
c) mouse
d) none of these
Answer:
c) mouse

Question 80.
________ device is used to control the movement of the cursor on the display screen.
a) scanner
b) keyboard
c) mouse
d) none of these
Answer:
c) mouse

Question 81.
_______ device is used to select icons, menus, command buttons or activate something on a computer.
a) scanner
b) keyboard
c) mouse
d) none of these
Answer:
c) mouse

Question 82.
_______ is a mouse action.
a) drag and drop
b) right dick
c) move
d) all the above
Answer:
d) all the above

Question 83.
_______ is a mouse type.
a) Mechanical
b) Optical
c) Laser
d) All the above
Answer:
c) Laser

Question 84.
The mechanical mouse was developed and introduced by _______.
a) Telefunken
b) Microsoft
c) Intel
d) None of these
Answer:
a) Telefunken

Question 85.
The mechanical mouse was developed and introduced in the year _______.
a) 1968
b) 1966
c) 1978
d) 1969
Answer:
a) 1968

Question 86.
The optical mouse introduced by _____was developed and introduced by _______.
a) Telefunken
b) Steve Krish
c) Richard Lyon
d) Both B and C
Answer:
d) Both B and C

Question 87.
The optical mouse was developed introduced in the year ________.
a) 1968
b) 1966
c) 1978
d) 1988
Answer:
d) 1988

Question 88.
The optical mouse has _______ Buttons.
a) 4
b) 5
c) 3
d) no
Answer:
c) 3

Question 89.
_______ mouse is highly sensitive andabie to work on any hard surface.
a) optical
b) mechanical
c) laser
d) all the above
Answer:
c) laser

Question 90.
Who invented Mouse?
a) Telefunken
b) steve
c) Richard Lyon
d) Douglas Engelbart
Answer:
d) Douglas Engelbart

Question 91.
Who assist Douglas Engel bard to invent moused?
a) Bill English
b) Steve Krish
c) Richard Lyon
d) None of these
Answer:
a) Bill English

Question 92.
_______ is used to ener the information directly into the computer’s memory.
a) Mouse
b) Scanner
c) Light Pen
d) All the above
Answer:
b) Scanner

Question 93.
The ________ device works like a Xerox machine.
a) Mouse
b) Scanner
c) Light Pen
d) AU the above
Answer:
b) Scanner

Question 94.
The ________ device is used for computer security.
a) Fingerprint Scanner
b) Scanner
c) Light Pen
d) All the above
Answer:
a) Fingerprint Scanner

Question 95.
_______ device uses biometric technology.
a) Fingerprint Scanner
b) Track ball
c) Light Pen
d) All the above
Answer:
a) Fingerprint Scanner

Question 96.
________ scanner uses unique patterns of a person’s retiant blood vessels.
a) Retinal
b) Track ball
c) Light Pen
d) All the above
Answer:
a) Retinal

Question 97.
________ is used to draw directly onto the screen.
a) Mouse
b) Light Pen
c) OCR
d) MICR
Answer:
b) Light Pen

Question 98.
________ is a pointing device.
a) Mouse
b) Light Pen
c) OCR
d) Both A and B
Answer:
d) Both A and B

Question 99.
________ is a device which detects characters printed or written on a paper.
a) Retinal scanner
b) Light Pen
c) OCR
d) Both A and B
Answer:
c) OCR

Question 100.
The document scanned through _______ device can be edited using a word processor.
a) Retinal scanner
b) Light Pen
c) OCR
d) Both A and B
Answer:
c) OCR

Question 101.
A user can scan a page from a book using ________ and can be edited using a word processor.
a) Retinal scanner
c) OCR
c) OCR
b) Light Pen
Answer:
c) OCR

Question 102.
The ________ is two dimension bar code which can be read by a camera and processed to interpret the image.
a) Retinal scanner
b) Light Pen
c) OCR
d) QR code
Answer:
d) QR code

Question 103.
The ___________ system gives fast and error free entry of information into the computer.
a) Bar Code
b) Light Pen
c) OCR
d) QR code
Answer:
a) Bar Code

Question 104.
_______ serves as a voice input device.
a) Bar Code Reader
b) Microphone
c) OCR
d) QR code reader
Answer:
b) Microphone

Question 105.
_______ captures images / videos directly in the digital form.
a) Bar Code Reader
b) Microphone
c) Digital Camera
d) QR code reader
Answer:
c) Digital Camera

Question 106.
_______ uses a CCD electronic chip.
a) Bar Code Reader
b) Microphone
c) Digital Camera
d) QR code reader
Answer:
c) Digital Camera

Question 107.
CCD means _______.
a) Charge Coupled Device
b) Change Coupled Device
c) Close Circuit Device
d) Charge Coupled Data
Answer:
a) Charge Coupled Device

Question 108.
________ converts fight rays into digital formats.
a) Bar Code Reader
b) Microphone
c) Digital Camera
d) QR code reader
Answer:
c) Digital Camera

Question 109.
A _______ is a display device that allows the user to interact with a computer by using the finger.
a) Touch Screen
b) Microphone
c) Digital Camera
d) QR code reader
Answer:
a) Touch Screen

Question 110.
_______ is an alternative to a mouse or keyboard for navigating a Graphical User Interface.
a) Touch Screen
b) Microphone
c) Digital Camera
d) QR code reader
Answer:
a) Touch Screen

Question 111.
Touch screen is used on _______.
a) Smart phone
b) Information kiosks
c) Cash registers
d) All the above
Answer:
d) All the above

Question 112.
_______ is a device for signaling by hand, by way of pressing one or more switches.
a) Touch Screen
b) Keyer
c) Digital Camera
d) QR code reader
Answer:
b) Keyer

Question 113.
________ number of keys available in Keyer.
a) 4 to 50
b) 4 to 500
c) Question 14
d) 50
Answer:
a) 4 to 50

Question 114.
In _______ device, the keys are arranged in a cluster.
a) Touch Screen
b) Keyer
c) Digital Camera
d) QR code reader
Answer:
b) Keyer

Question 115.
_______ is the most commonly used output device to display the information.
a) Plotter
b) Monitor
c) Speaker
d) All the above
Answer:
b) Monitor

Question 116.
Pictures on a monitor are formed with picture elements called _______.
a) Pixels
b) Points
c) Dots
d) None of these
Answer:
a) Pixels

Question 117.
________ is a monitor type.
a) CRT
b) LED
c) LCD
d) All the above
Answer:
d) All the above

Question 118.
CRT stands for _______.
a) Cathode Ray Tube
b) Carbon Ray Tube
c) Cathode Ray Terminal
d) Cathode Ray Tunnel
Answer:
a) Cathode Ray Tube

Question 119.
LED stands for _______.
a) Light Emitting Diodes
b) Light Emitting Device
c) Liquid Emitting Diodes
d) Light. Extracting Device
Answer:
a) Light Emitting Diodes

Question 120.
LCD stands for _______.
a) Liquid Crystal Display
b) Light Crystal Display
c) Large Crystal Display
d) Liquid Circuit Display
Answer:
a) Liquid Crystal Display

Question 121.
The monitor works with _______.
a) CGA
b) VGA
c) MGA
d) None of these
Answer:
b) VGA

Question 122.
VGA stands for _______.
a) Video Graphics Array
b) Video Generation Array
c) Video Graphics Adapter
d) Vector Generation Array
Answer:
a) Video Graphics Array

Question 123.
_______ acts as an interface between the computer and display monitor.
a) CGA
b) VGA
c) MGA
d) None of these
Answer:
b) VGA

Question 124.
The first computer monitor was released on _______.
a) March 1, 1973
b) March 31, 1973
c) March 21, 1973
d) March 1, 1963
Answer:
a) March 1, 1973

Question 125.
The first computer monitor was part of the _______ computer system.
a) Alto Xerox
b) Xerox Alto
c) Xerox
d) Alto
Answer:
b) Xerox Alto

Question 126.
The communicate with the screen.
a) Video Graphics Card
b) Video Graphics Channel
c) Video Group Card
d) Video Generation Card
Answer:
a) Video Graphics Card

Question 127.
_______ is an output device that is used to produce graphical output on papers.
a) Monitor
b) Plotter
c) Speaker
d) None of these
Answer:
b) Plotter

Question 128.
Printers are divided into _______ categories.
a) 2
b) 3
c) 4
d) 5
Answer:
a) 2

Question 129.
_______ printers print with striking of hammers or pins on ribbon.
a) Non-impact
b) Impact
c) plotter
d) None of these
Answer:
b) Impact

Question 130.
_______ printer is an impact printer.
a) Dot matrix
b) Line
c) Laser
d) Both A and B
Answer:
c) Laser

Question 131.
A _______ printer prints using a fixed number of pins or wires.
a) Dot matrix
b) Line
c) Laser
d) Both A and B
Answer:
a) Dot matrix

Question 132.
The priting speed of a Dot matrix printer is _______ CPS.
a) 300 to 1550
b) 30 to 1550
c) 30 to 1555
d) 30 to 1505
Answer:
b) 30 to 1550

Question 133.
_______ printer uses a fixed print head for priting.
a) Dot matrix
b) More than 1000
c) Laser
d) less than 500
Answer:
b) More than 1000

Question 134.
The priting speed of a line printer _________ LPM.
a) Less than 1000
b) More than 1000
c) 300
d) less than 500
Answer:
b) More than 1000

Question 135.
CPS stands for _______.
a) Character Printing Speed
b) Character Per Second
c) Character Per Stroke
d) Character Per Session
Answer:
b) Character Per Second

Question 136.
________ printers do not use striking mechanism for printing.
a) Non-impact
b) Impact
c) Both A and B
d) None of these
Answer:
a) Non-impact

Question 137.
_______ printer is a Non-impact printer,
a) Laser
b) Inkjet
c) Line
d) Both A and B
Answer:
d) Both A and B

Question 138.
The chief characteristics of laser printer is their ________.
a) printing speed
b) resolution
c) cost
d) All the above
Answer:
b) resolution

Question 139.
The resolution of a laser printer is measured in the unit _______.
b) LPM
d) None of these
b) Dots Per Instance
d) None of these
Answer:

Question 140.
DPI stands for _______.
a) Dots Per Inch
b) Dots per Insurance
c) Darkness Per Inch
d) None of these
Answer:
a) Dots Per Inch

Question 141.
The available resolution range of a laser printer around _______ DPI.
a) 1024
b) 12000
c) 1200
d) 1020
Answer:
c) 1200

Question 142.
The priting speed of a Laser printer is approximately _______ PPM.
a) 100
b) 1000
c) 1200
d) 1024
Answer:
a) 100

Question 143.
Inkjet printer uses ________ colour inks to create colour tones.
a) Magenta
b) Yellow
c) Cyan
d) All the above
Answer:
d) All the above

Question 144.
PPM stands for _______.
a) Paper Per Minute
b) Paper Per Moment
c) Pixels Per Minute
d) None of these
Answer:
a) Paper Per Minute

Question 145.
_______ produces voice output.
a) Plotter
b) Speaker
c) Mic
d) None of these
Answer:
b) Speaker

Question 146.
_______ is used to produce computer output on a big screen.
a) Speaker
b) Plotter
c) Multimedia projector
d) All the above
Answer:
c) Multimedia projector

Question 147.
A(n) _______ is a basic software that makes the computer to work.
a) Application software
b) Compiler
c) Loader
d) Operating system
Answer:
d) Operating system

Question 148.
POST sequence check the device .
a) RAM
b) Keyboard
c) Monitor
d) All the above
Answer:
d) All the above

Question 149.
If POST sequence is successful then _______ gets executed.
a) BIOS
b) Application program
c) Compiler
d) None of these
Answer:
a) BIOS

Question 150.
BIOS means _______.
a) Basic Input Output System
b) Basic Input Output Scheme
c) Best Input Output System
d) Beginners Input Output System
Answer:
a) Basic Input Output System

Question 151.
After POST sequence, BIOS gets execute is called _______.
a) booting
b) shutdown
c) hibernate
d) login
Answer:
a) booting

Question 152.
Booting process is of _______ types.
a) 5
b) 4
c) 3
d) 2
Answer:
d) 2

Question 153.
When the system starts from initial state when the computer is switched on is called ______ booting.
a) Warm
b) Cold
c) Hard
d) Either B or C
Answer:
b) Cold

Question 154.
When the user presses the Power button, the instructions are read from the ______ to initiate the booting process.
a) RAM
b) CD-RAM
c) Hard disk
d) ROM
Answer:
d) ROM

Question 155.
When the system restarts or when Reset button is pressed _______ booting
a) Warm
b) Soft
c) Hard
d) Either A or B
Answer:
d) Either A or B

Question 156.
During _______ booting, there are chances of data loss and system damage as the data might not have been stored properly.
a) Warm
b) Soft
c) Hard
d) Either A or B
Answer:
d) Either A or B

Question 157.
_______ interprets and executes software instructions.
a) ALU
b) CPU
c) Cache memory
d) None of these
Answer:
b) CPU

Question 158.
There are totally ______ Symbols / Graphemes / Characters in the Indus Script.
a) 417
b) 407
c) 471
d) 147
Answer:
a) 417

Question 159.
_______ is a sub-field of Artificial Intelligence.
a) Neural Network
b) Nature Network
c) GUI
d) None of these
Answer:
a) Neural Network

Question 160.
Expand USB _______.
a) Universal Serial Bus
b) Unique Serial Bus
c) Universal Serial Board
d) Universal Serial Booting
Answer:
a) Universal Serial Bus

Question 161.
Transistor means _______.
a) Transfer resistance
b) Transfer register
c) Track resistance
d) Tangent resistance
Answer:
a) Transfer resistance

Question 162.
LPM stands for ______.
a) Lines Per Minute
b) Lines Per Moment
c) Line Print Machine
d) Line Print Mechanism
Answer:
a) Lines Per Minute

Part – II

Short Answers

Question 1.
Why Charles Babbage is called as father of modern computer.
Answer:
Charles Babbage is considered to be the father of computer, for his invention and the concept of Analytical Engine in 1837. The Analytical Engine contained an Arithmetic Logic Unit (ALU), basic flow control, and integrated memory; which led to the development of first general purpose computer concept.

Question 2.
Write note on ENIAC.
Answer:
The ENIAC (Electronic Numerical Integrator And Calculator) was invented by 1 Presper Eckert and John Mauchly at the University of Pennsylvania and began construction in 1943 and was not completed until 1946. It occupied about 1,800 square feet and used about 18,000 vacuum tubes, weighing almost 50 tons. ENIAC was the first digital computer because it was fully functional.

Question 3.
Write note on Optical Character Recognition Engine.
Answer:
Optical Character Recognition (Optical Grapheme Recognition) engine for the Indus Scripts has been developed using Deep Learning Neural Networks. Given photographs, scans, or any image feed of an Indus Valley Civilization ‘ artifact, the system will be able to recognize the inscriptions (the symbol / grapheme sequences) from the image. There are totally 417 Symbols/ Graphemes/ Characters in the Indus Scripts and just 3700+ text inscriptions of data for the machine to learn and attain expert-level status.

Question 4.
Define Data.
Answer:
Data is defined as an un-processed collection of raw facts, suitable for communication, interpretation or processing.

Question 5.
Define Information.
Answer:
Information is a processed fact from which conclusions may be drawn.

Question 6.
Define Hardware.
Answer:
Hardware is the physical component of a computer like motherboard, memory devices, monitor, keyboard etc.

Question 7.
Define Software.
Answer:
Software is the set of programs or instructions. It is classified into System software (Ex. Operating system) and Application software (Ex. MS-Word).

Question 8.
Write note on IPO cycle.
Answer:
Every task given to a computer follows an Input- Process- Output Cycle (IPO cycle). It needs certain input, processes that input and produces the desired output. The input unit takes the input, the central processing unit does the processing of data and the output unit produces the output.

Question 9.
Write note on Input unit.
Answer:
Input unit is used to feed any form of data to the computer, which can be stored in the memory unit for further processing.

Example:
Keyboard, mouse, etc.

Question 10.
Write note on output unit.
Answer:
An Output Unit is any hardware component that conveys information to users in an understandable form. Example: Monitor, Printer etc.

Question 11.
Write note on primary memory.
Answer:
The primary memory is volatile, that is, the content is lost when the power supply is switched off. Ex. Random Access Memory (RAM),

Question 12.
Write note on secondary memory.
Answer:
The secondary memory is non-volatile, that is, the content is available even after the power supply is switched off.

Example: Hard disk, CD-ROM , DVD ROM etc.

Question 13.
Who invented Mouse?
Answer:
The computer mouse was invented and developed by Douglas Engelbart, with the assistance of Bill English, during the 1960’s and was patented on November 17, 1970.

Question 14.
What is use of scanner?
Answer:
Scanners are used to enter the information directly into the computer’s memory. This device works like a Xerox machine. The scanner converts any type of printed or written Information including photographs into a digital format, which can be manipulated by the computer.

Question 15.
What are the types of keyboard?
Answer:
The keyboard types are :

1. Wired keyboard.
2. Wireless keyboard.
3. Virtual keyboard.

Question 16.
Write short note on Track ball.
Answer:
Track bail is similar to the upside down design of the mouse. The user moves the ball directly, while the device itself remains stationary. The user spins the bail in various directions to navigate the screen movements.

Question 17.
What is the use of Retinal scanner?
Answer:
This performs a retinal scan which is a biometric technique that uses unique patterns on a person s retinal blood vessels.

Question 18.
Write short note on Barcode reader.
Answer:
A Bar code is a pattern printed in lines of different thickness. The Bar code reader scans the information on the bar codes transmits to the Computer for further processing. The system gives fast and error free entry of information into the computer.

Question 19.
Write short note on QR code reader.
Answer:
The QR (Quick response) code is the two dimension bar code which can be read by a camera and processed to interpret the image.

Question 20.
What is the use of Voice Input System?
Answer:
Microphone serves as a voice Input device. It captures the voice data and send it to the computer. Using the microphone along with speech recognition software can offer a completely new approach to input information into the Computer,

Question 21.
Write short note oh Digital Camera.
Answer:
It captures images / videos directly in the digital form. It uses a CCD (Charge Coupled Device) electronic chip. When light falls on the chip through the lens, it converts light rays into digital format.

Question 22.
Write about Plotter.
Answer:
Plotter is an output device that is used to produce graphical output on papers. It uses single color or multi color pens to draw pictures,

Question 23.
Write short note on printer.
Answer:
Printers are used to print the information on papers. Printers are divided into two main categories:

1. Impact Printers
2. Non Impact printers.

Question 24.
Write about Multimedia Projectors.
Answer:
Multimedia projectors are used to produce computer output on a big screen. These are used to display presentations in meeting halls or in classrooms.

Question 25.
What do you mean by natural language processing?
Answer:
It is a method used in artificial intelligence to process and derive meaning from the human language.

Question 28.
Write about Robotics.
Answer:
Robot is a term coined by Karel Capek in 1921 to play RUR (Rossum’s Universal Robots). It is used to describe a computerized machine designed to respond to input received manually or from its surroundings.

Question 27.
Write note on Nanotechnology.
Answer:
Nanotechnology is an engineering, science and technology that develops machines or works with one atom or one molecule that is 100 nanometers or smaller.

Question 28.
Write note on Bioengineering.
Answer:
It is a discipline that applies engineering principles of design and analysis to biological systems and biomedical technologies.

Question 29.
What is high level language?
Answer:
A high level language is a computer programming language that is not limited by the computer, designed for a specific job and is easier to understand.

Question 30.
Write, about Integrated Circuits.
Answer:
The integrated circuit is a package containing many circuits, pathways, transistors and other electronic components all working together to perform a particular function or a series of functions.

Question 31.
Write note on punched card.
Answer:
It also known as Hollerith card is paper card containing several punched or perforated holes that were punched by hand or machine to represent data.

Part – III

Explain In Brief

Question 1.
Write note on keyboard.
Answer:
Keyboard is the most common input device used today. The individual keys for letters, numbers and special characters are collectively known as character keys. This keyboard layout is derived from the keyboard of original typewriter.

The data and instructions are given as input to the computer by typing on the keyboard) Apart from alphabet and numeric keys, it also has Function keys for performing different functions. There are different set of keys available in the keyboard such as character keys, modifier keys, system and GUI keys, enter and editing keys, function keys, navigation keys, numeric keypad and lock keys.

Question 2.
What is the purpose of Fingerprint scanner?
Answer:
Finger print Scanner is a fingerprint recognition device used for computer security, equipped with the fingerprint recognition feature that uses biometric technology. Fingerprint Reader / Scanner is a very safe and convenient device for security instead of using passwords, which is vulnerable to fraud and is hard to remember.

Question 3.
Write note on Light Pen.
Answer:
A light pen is a pointing device shaped like a pen and is connected to a monitor. The tip of the light pen contains a light-sensitive element which detects the light from the screen enabling the computer to identify the location of the pen on the screen. Light pens have the advantage of ‘drawing’ directly onto the screen, but this becomes hard to use, and is also not accurate.

Question 4.
What is the purpose of Optical Character Reader.
Answer:
It is a device which detects characters printed or written on a paper with OCR, a user can scan a page from a book. The Computer will recognize the characters in the page as letters and punctuation marks and stores. The Scanned document can be edited using a wordprocessor.

Question 5.
Write note on Touch screen.
Answer:
A touch screen is a display device that allows the user to interact with a computer by using the finger. It can be quite useful as an alternative to a mouse or keyboard for navigating a Graphical User Interface (GUI).

Touch screens are used on a wide variety of devices such as computers, laptops, monitors, smart phones, tablets, cash registers and information kiosks. Some touch screens use a grid of infrared beams to sense the presence of a finger instead of utilizing touch-sensitive input.

Question 6.
Write about Keyer.
Answer:
A Keyer is a device for signaling by hand, by way of pressing one or more switches. Modern keyers have a large number of switches but not as many as a full size keyboard. Typically, this number is between 4 and 50. A keyer differs from a keyboard, which has “no board”, but the keys are arranged in a cluster.

Question 7.
Explain briefly about Monitor.
Answer:
Monitor is the most commonly used output device to display the information. Pictures on a monitor are formed with picture elements called PIXELS. Monitors may either be Monochrome or can be color. There are many types of monitors available such as CRT (Cathode Ray Tube), LCD (Liquid Crystal Display) and LED (Light Emitting Diodes).

The monitor works with the VGA (Video Graphics Array) card) The video graphics card helps the keyboard to communicate with the screen. It acts as an interface between the computer and display monitor. The first computer monitor was part of the Xerox Alto computer system, which was released on March 1, 1973.

Question 8.
Write about speaker? Where it is mostly used?
Answer:
Speakers produce voice output (audio). Using speaker along with speech synthesize software, the computer can provide voice output. This has become very common in places like airlines, schools, banks, railway stations, etc.

Question 9.
Compare assembly language and machine language.
Answer:
An assembly language is a low level programming language. Machine language is a collection of binary digits or bits that the computer reads and interprets directly.

Question 10.
Write note on i) Transistor ii) Vacuum tube
Answer:
i) Transistor : The transistor (transfer resistance) is made up of semi conductors. It is a component used to control the amount of current or voltage used for amplification / modulation of an electronic signal.

ii) Vacuum Tube : It contains electrodes for controlling electron flow and were used in early computers as a switch or an amplifier.

Part – IV

Explain In Detail

Question 1.
Explain the types of Mouse.
Answer:
Different types of mouse available are: Mechanical Mouse, Optical, Laser Mouse, Air Mouse, 3D Mouse, Tactile Mouse, Ergonomic Mouse and Gaming Mouse.

Question 2.
Explain briefly about impact printers.
Answer:
These printers print with striking of hammers or pins on ribbon. These printers can print on multi¬part (using carbon papers) by using mechanical pressure. Ex: Dot Matrix printers and Line matrix printers.

A Dot matrix printer that prints using a fixed number of pins or wires. Each dot is produced by a tiny metal rod, also called a “wire” or “pin” which works by the power of a tiny electromagnet or solenoid, either directly or through a set of small levers. It generally prints one line of text at a time. The printing speed of these printers varies from 30 to 1550 CPS (Character Per Second).

Line matrix printers use a fixed print head for printing. Basically, it prints a page-wide line of dots. But it builds up a line of text by printing lines of dots. Line printers are capable of printing much more than 1000 Lines Per Minute, resulting in thousands of pages per hour. These printers are also uses mechanical pressure to print on multi-part (using carbon papers).

Question 3.
Explain briefly about non-impact printers.
Answer:
These printers do not use striking mechanism for printing. They use electrostatic or laser technology. Quality and speed of these printers are better than Impact printers. Ex: Laser printers and Inkjet printers.

Laser Printers :
Laser printers mostly work with similar technology used by photocopiers. It makes a laser beam scan back and forth across a drum inside the printer, building up a pattern. It can produce very good quality of graphic images. One of the chief characteristics of laser printer is their resolution – how many Dots per inch (DPI). The available resolution range around 1200 dpi. Approximately it can print 100 pages per minute (PPM).

Inkjet Printers:
Inkjet Printers use colour cartridges which combined Magenta, Yellow and Cyan inks to create color tones. A black cartridge is also used for monochrome output. Inkjet printers work by spraying ionised ink at a sheet of paper. The speed of Inkjet printers generaly range from 1-20 PPM (Page Per Minute).

They use the technology of firing ink by heating it so that it explodes towards the paper in bubbles or by using piezoelectricity in which tiny electric currents controlled by electronic circuits are used inside the printer to spread ink in jet speed) An Inkjet printer can spread millions of dots of ink at the paper every single second.

Question 4.
Explain briefly about booting of computer. Explain its types.
Answer:
An Operating system (OS) is a basic software that makes the computer to work. When. a computer is switched on, there is no information in its RAM. At the same time, in ROM, the pre-written program called POST (Power on Self Test) will be executed first. This program checks if the devices like RAM, keyboard, etc), are connected properly and ready to operate.

If these devices are ready, then the BIOS (Basic Input Output System) gets executed) This process is called Booting. Thereafter, a program called “Bootstrap Loader” transfers OS from hard disk into main memory. Now the OS gets loaded (Windows/Linux) and will get executed.

Booting process is of two types:

• Cold Booting.
• Warm Booting.

Cold Booting :
When the system starts from initial state i.e. it is switched on, we call it cold booting or Hard Booting: When the user presses the Power button, the instructions are read from the ROM to initiate the booting process.

Warm Booting :
When the system restarts or when Reset button is pressed, we call it Warm Booting or Soft Booting. The system does not start from initial state and so all diagnostic tests need not be carried out in this case. There are chances of data loss and system damage as the data might not have been stored properly.