Samacheer Kalvi 11th Computer Applications Guide Chapter 4 Theoretical Concepts of Operating System

Tamilnadu State Board New Syllabus Samacheer Kalvi 11th Computer Applications Guide Pdf Chapter 4 Theoretical Concepts of Operating System Text Book Back Questions and Answers, Notes.

Tamilnadu Samacheer Kalvi 11th Computer Applications Solutions Chapter 4 Theoretical Concepts of Operating System

11th Computer Applications Guide Theoretical Concepts of Operating System Text Book Questions and Answers

Part – I

Choose The Correct Answers

Question 1.
Operating system is a ________.
a) Application Software
b) Hardware
c) System Software
d) Component
Answer:
c) System Software

Question 2.
Identify the usage of Operating Systems ________.
a) Easy interaction between the human and computer
b) Controlling input & output Devices
c) Managing use of main memory
d) All the above
Answer:
d) All the above

Question 3.
Which of the following is not a function of an Operating System?
a) Process Management
b) Memory Management
c) Security management
d) Complier Environment
Answer:
d) Complier Environment

Question 4.
Which of the following OS is a Commercially licensed Operating system?
a) Windows
b) UBUNTU
C) FEDORA
d) REDHAT
Answer:
a) Windows

Question 5.
Which of the following Operating systems support Mobile Devices?
a) Windows 7
b) Linux
c) BOSS
d) IOS
Answer:
d) IOS

Question 6.
File Management manages ________.
a) Files
b) Folders
c) Directory systems
d) All the Above
Answer:
d) All the Above

Question 7.
Interactive Operating System provides ________.
a) Graphics User Interface (GUI)
b) Data Distribution
c) Security Management
d) Real Time Processing
Answer:
a) Graphics User Interface (GUI)

Question 8.
Android is a ________.
a) Mobile Operating system
b) Open Source
c) Developed by Google
d) All the above
Answer:
d) All the above

Question 9.
Which of the following refers to Android operating system’s version?
a) JELLY BEAN
b) UBUNTU
c) OS/2
d) MITTIKA
Answer:
a) JELLY BEAN

Part – II

Short Answers

Question 1.
What are the advantages of management in Operating System?
Answer:

1. Keeping track of which portion of memory are currently being used and who is using them.
2. Determining which and data to move in and out of memory.
3. Allocation and de-allocation of memory blocks as needed by the program in main memory.

Question 2.
What is the multi-user Operating system?
Answer:
It is used in computers and laptops that allow same data and applications to be accessed by multiple users at the same time. The users can also communicate with each other. Windows, Linux and UNIX are examples for multi-user Operating System.

Question 3.
What is a GUI?
Answer:
The GUI is a window based system with a pointing device to direct I/O, choose from menus, make selections and a keyboard to enter text.

Question 4.
List out different distributions of Linux operating system.
Answer:
Linux distributors are Ubuntu, Mint, Fedora, RedHat, Debian, Google’s Android, Chrome OS, and Chromium OS.

Question 5.
What are the security management features available in Operating System?
Answer:
The Operating System provides three levels of securities to the user end. They are:

1. File access level
2. System level
3. Network level

Question 6.
What is multi-processing?
Answer:
This is a one of the features of Operating System. It has two or more processors for a single running process.

Question 7.
What are the different Operating Systems used in computer?
Answer:

1. Single User Operating Systems
2. Multi-user Operating Systems
3. Distributed Operating Systems

Part – III

Explain In Brief

Question 1.
What are the advantages and disadvantages of Time-sharing features?
Answer:
Advantages:

• Many applications can run at the same time.
• The CPU is not idle.
• Provides the advantage of quick response.

Disadvantages:

• It consumes much resources.
• Constraint on security and integrity of data.
• Reliability constraint exists.

Question 2.
Explain and List out examples of mobile operating system.
Answer:
Mobile, devices such as phones, tablets and MP3 players are different from desktop and laptop computers and hence they need special Operating Systems. Examples of mobile Operating Systems are Apple iOS and Google Android. Operating systems for mobile devices generally are not as fully featured as those made for desktop and laptop computers and they are not able to run all software.

Question 3.
What are the differences between Windows and Linux Operating system?
Answer:
Windows:

• It is a licensed OS
• Vulnerable to viruses and malware attacks
• Windows must boot from the primary- partition
• Windows file name are not case sensitive
• Windows uses the micro kernel which takes less space

Linux:

• Linux is an open source operating system
• More secure
• It can be booted from either primary or logical partition
• In Linux, file names are case sensitive
• Linux uses the monolithic kernel which consumes more running space

Question 4.
Explain the process management algorithms in Operating System.
Answer:
The following process management algorithms are mainly used to allocate the job to the processor.

1. FIFO – This algorithm is based on queuing technique.
2. SJF – This algorithm works based on the size of the job being executed by the CPU.
3. Round Robin – The Round Robin (RR) scheduling algorithm is designed especially for time sharing systems.
4. Based on Priority – The given job (process) is assigned based on a Priority.

Part – IV

Explain In Detail

Question 1.
Explain the concept of a Distributed Operating System.
Answer:
Distributed Operating System takes care of the data and application that are stored and processed on multiple physical locations across the world over the digital network (internet/intranet). The Distributed Operating System is used to access shared data and files that reside in any machine around the world. The user can handle the data from different locations. The users can access as if it is available on their own computer.

The advantages of distributed Operating System are as follows:

• A user at one location can make use of all the resources available at another location over the network.
• Many computer resources can be added easily in the network.
• Improves the interaction with the customers and clients.
• Reduces the load on the host computer.

Question 2.
Explain the main purpose of an operating system.
Answer:
The main use of Operating System is:

1. To ensure that a computer can be used to extract what the user wants it do.
2. Easy interaction between the users and computers.
3. Starting computer operation automatically when power is turned on (Booting).
4. Controlling Input and Output Devices.
5. Manage the utilization of main memory.
6. Providing security to user programs.

Question 3.
Explain advantages and disadvantages of open source operating systems.
Answer:
Advantages of Open Source Software:

• It is generally free and you do not have to pay for using it.
• Created by skillful and talented people.
• Highly reliable.
• Help you become more flexible.
• Open source software provides great platform for innovations and creativity.

Disadvantages of Open Source Software:

• Vulnerable to malicious users.
• Most interfaces are not so user-friendly and easy to use.
• Don’t come with extensive support.
• Open source software is hard to learn. It is not straightforward to use.
• Many of the latest hardware that are being produced is incompatible.

11th Computer Applications Guide Theoretical Concepts of Operating System Additional Important Questions and Answers

Part – I

Choose The Correct Answers:

Question 1.
________ is set of instructions that perform specific task.
a) hardware
b) freeware
c) software
d) none of these
Answer:
c) software

Question 2.
________ interacts basically with the hardware to generate the desired output.
a) hardware
b) freeware
c) software
d) None of these
Answer:
c) software

Question 3.
Software, is classified into ________ types.
a) three
b) two
c) four
d) many
Answer:
b) two

Question 4.
________ is a software classification.
a) application software
b) system software
c) both A and B
d) None of these
Answer:
c) both A and B

Question 5.
________ is a set of programs to perform specific task.
a) application software
b) system software
c) both A and B
d) None of these
Answer:
a) application software

Question 6.
________ is an application software.
a) MS-Word
b) VLC player
c) MS-Excel
d) All the above
Answer:
d) All the above

Question 7.
________ is an application software to create text document.
a) MS-Word
b) VLC player
c) MS-Excel
d) All the above
Answer:
a) MS-Word

Question 8.
________ is an application software to play audio, video files.
a) MS-Word
b) VLC player
c) MS-Excel
d) All the above
Answer:
b) VLC player

Question 9.
________ is a type of computer program that is designed to run the computer’s hardware and application programs.
a) application software
b) system software
c) both A and B
d) None of these
Answer:
b) system software

Question 10.
________ is a system software.
a) Operating System
b) Language Processor
c) Both A and B
d) None of these
Answer:
c) Both A and B

Question 11.
A(n) ________ is a system software which serves as an interface between a us# and a computer.
a) Operating System
b) Language processes
c) VLC player
d) MS-Word
Answer:
a) Operating System

Question 12.
________ controls input, output all other peripheral devices.
a) Operating System
b) Language Processor
c) VLC player
d) MS-Word
Answer:
a) Operating System

Question 13.
The function of an Operating System includes ________
a) file management and memory management
b) process management
c) device management
d) All the above
Answer:
d) All the above

Question 14.
Without a(n) ________, a computer cannot effectively manage all the resources.
a) Operating System
b) Language
c) Both A and B
d) None of the above
Answer:
a) Operating System

Question 15.
When a computer is switched on, loaded in to ________ memory automatically.
a) Operating System
b) Language
c) Application program
d) None of these
Answer:
a) Operating System

Question 16.
A user cannot communicate directly computer ________.
a) software
b) hardware
c) Both A and B
d) None of these
Answer:
b) hardware

Question 17.
The popular Operating System used in personal computers and laptops is ________.
a) Windows
b) UNIX
c) Linux
d) All the above
Answer:
d) All the above

Question 18.
The mobile devices mostly use ________ mobile OS.
a) Android
b) iOS
c) Either A or B
d) None of these
Answer:
c) Either A or B

Question 19.
Operating System manage ________
a) Software
b) Hardware
c) Both A and B
d) None of the above
Answer:
c) Both A and B

Question 20.
Operating System is basically – an interface between the ________.
a) user and hardware
b) user and memory
c) programmer and hardware
d) none of these
Answer:
a) user and hardware

Question 21.
________ works as translator.
a) user and hardware
b) user and freeware
c) programmer and hardware
d) operating system
Answer:
d) operating system

Question 22.
________ translates the user request into machine language.
a) Operating System
b) Language Processor
c) Application program
d) None of these
Answer:
a) Operating System

Question 23.
________ converts processed information into user readable form.
a) Operating System
b) Language Processor
c) Application program
d) None of these
Answer:
a) Operating System

Question 24.
The main use of Operating system is ________
a) Controlling Input and Output Devices
b) Manage the utilization of main memory
c) Providing security to user programs
d) All the above
Answer:
d) All the above

Question 25.
An operating system allows only a single user to perform a task at a time is called as a ________ OS.
a) Single User
b) Single Task
c) Either A or B
d) None of these
Answer:
a) Single User

Question 26.
A user task is a ________ function.
a) printing a document
b) writing a file to disk
c) editing a file or downloading a file
d) All the above
Answer:
d) All the above

Question 27.
________ is an example for a single user and single task Operating System.
a) Unix
b) MS-DOS
c) Both A and B
d) None these
Answer:
b) MS-DOS

Question 28.
________ OS is used in computers and laptops.
a) Multi user
b) Multi task
c) Either A or B
d) None of these
Answer:
a) Multi user

Question 29.
________ allows same data and applications to be accessed by multiple users at the same time.
a) Multi user
b) Multi task
c) Single user
d) MS-DOS
Answer:
a) Multi user

Question 30.
In ________ OS users can also communicate with each other.
a) Multi user
b) Multi task
c) Single user
d) MS-DOS
Answer:
a) Multi user

Question 31.
________ is an example for multi-user operating system.
a) Windows
b) Linux
c) UNIX
d) All the above
Answer:
d) All the above

Question 32.
A cheap computer can be build with ________
a) raspbion OS
b) Raspberry Pi
c) Both A and B
d) None of these
Answer:
c) Both A and B

Question 33.
________ is a platform that’s designed to teach how to build a computer.
a) raspbion OS
b) Raspberry Pi
c) Both A and B
d) None of these
Answer:
a) raspbion OS

Question 34.
________ is a key feature of an OS.
a) User interface
b) Fault tolerance
c) Memory management
d) All the above
Answer:
d) All the above

Question 35.
________ is the only way that user can make interaction with a computer.
a) User interface
b) Fault tolerance
c) Memory management
d) All the above
Answer:
a) User interface

Question 36.
________ is the main reason for the key success of GUI.
a) User friendly
b) Fault tolerance
c) Robust
d) None of these
Answer:
a) User friendly

Question 37.
GUI means ________.
a) Graphical User Interlink
b) Good User Interface
c) Graph User Interface
d) Graphical User Interface
Answer:
d) Graphical User Interface

Question 38.
The ________ is a window based system.
a) command mode
b) GUI
c) both A and B
d) None of these
Answer:
b) GUI

Question 39.
________ are playing vital role of the particular application.
a) Icons
b) Commands
c) Navigations
d) None of these
Answer:
a) Icons

Question 40.
The ________ should satisfy the customer based on their needs.
a) user interface
b) fault tolerance
c) memory management
d) all the above
Answer:
a) user interface

Question 41.
The ________ should save user’s precious time.
a) user interface
b) fault tolerance
c) memory management
d) all the above
Answer:
a) user interface

Question 42.
The ________ is to satisfy the customer.
a) user interface
b) fault tolerance
c) memory management
d) all the above
Answer:
a) user interface

Question 43.
The ________ should reduce number of errors committed by the user.
a) process management
b) fault tolerance
c) memory management
d) none of these
Answer:
d) none of these

Question 44.
________ is the process of controlling and coordinating computer’s main memory.
a) process management
b) fault tolerance
c) memory/ management
d) none of these
Answer:
c) memory/ management

Question 45.
________ is the process of assigning memory space to various running programs to optimize overall computer performance.
a) user interface
b) memory management
c) fault tolerance
d) all the above
Answer:
b) memory management

Question 46.
________ involves the allocation of specific memory blocks to individual programs based on user demands.
a) user interface
b) memory management
c) fault tolerance
d) all the above
Answer:
b) memory management

Question 47.
________ ensures the availability of adequate memory for each running program at all times.
a) process management
b) fault tolerance
c) memory management
d) none of these
Answer:
c) memory management

Question 48.
The objective of Memory Management process is to improve ________.
a) the utilization of the CPU
b) the speed of the computer’s response
c) Both A and B
d) None of these
Answer:
c) Both A and B

Question 49.
The Operating System is responsible for the ________.
a) Keeping track of which portion of memory are currently being used and who is using them.
b) Determining which processes and data to move in and out of memory.
c) Allocation and de-allocation of memory blocks as needed by the program in main memory.
d) All the above
Answer:
d) All the above

Question 50.
________ is function that includes creating and deleting processes.
a) process management
b) fault tolerance
c) memory management
d) none of these
Answer:
a) process management

Question 51.
________ providing mechanisms for processes to communicate and synchronize with each other.
a) process management
b) fault tolerance
c) memory management
d) none of these
Answer:
a) process management

Question 52.
A(n) ________ is the unit of work in a computer.
a) task
b) process
c) operation
d) none of these
Answer:
b) process

Question 53.
A word-processor program being run by an individual user on computer is a ________.
a) task
b) process
c) operation
d) none of these
Answer:
b) process

Question 54.
A system task, such as sending output to a printer or screen, can also be called as a ________ .
a) task
b) process
c) operation
d) none of these
Answer:
b) process

Question 55.
A computer processes are classified as _________ categories.
a) 5
b) 4
c) 3
d) 2
Answer:
d) 2

Question 56.
A category of computer process is ________ .
a) operating system process
b) user process
c) both A and B
d) None of these
Answer:
c) both A and B

Question 57.
________ process is executed by system code.
a) operating system process
b) user process
c) both A and B
d) None of these
Answer:
a) operating system process

Question 58.
________ process is execute by user code.
a) operating system process
b) user process
c) both A and B
d) None of these
Answer:
b) user process

Question 59.
All the computer processes can potentially execute concurrently on a ________ CPU.
a) single
b) parallel
c) linear
d) none of these
Answer:
a) single

Question 60.
A process needs certain resources including _________ to finish its task.
a) CPU time
b) Memory
c) Files and I/O devices
d) All the above
Answer:
d) All the above

Question 61.
The Operating System is responsible for the ________ activity.
a) Scheduling processes and threads on the CPUs
b) Suspending and resuming processes
c) Providing mechanisms for process synchronization
d) All the above
Answer:
d) All the above

Question 62.
The ________ algorithm is mainly used to allocate the job to the processor.
a) FIFO or SJF
b) Round Robin
c) Based on Priority
d) All the above
Answer:
d) All the above

Question 63.
FIFO means ________.
a) First In Fast Out
b) Fast In First Out
c) First In First Out
d) None of these
Answer:
c) First In First Out

Question 64.
________ is based on queuing technique.
a) FIFO
b) Round Robin
c) Based on Priority
d) All the above
Answer:
a) FIFO

Question 65.
________ algorithm works based on the size of the job being executed by the CPU.
a) FIFO
b) Round Robin
c) Based on Priority
d) SJF
Answer:
d) SJF

Question 66.
________ algorithm is designed especially for time sharing systems.
a) FIFO
b) Round Robin
c) Based on Priority
d) SJF
Answer:
b) Round Robin

Question 67.
In ________ algorithm jobs are assigned and processor time in a circular method.
a) FIFO
b) Round Robin
c) Based on Priority
d) SJF
Answer:
b) Round Robin

Question 68.
The challenge in computer and software industry is to protect user’s ________ from hackers.
a) data
b) operation
c) hardware
d) all the above
Answer:
a) data

Question 69.
The Operating System provides ________ levels of securities to the user end.
a) four
b) three
c) two
d) many
Answer:
b) three

Question 70.
The Operating System security is ________.
a) File access level
b) System level
c) Network level
d) All the above
Answer:
d) All the above

Question 71.
In order to access the files created by other people, you should have the ________.
a) user name and password
b) ogin id
c) email id
d) access permission
Answer:
d) access permission

Question 72.
File aces permissions can be granted by the ________.
a) creator of the file
b) administrator of the system
c) Either A or B
d) None of these
Answer:
c) Either A or B

Question 73.
________ level security is offered by the password in a multi-user environment.
a) File access
b) System
c) Network
d) All the above
Answer:
b) System

Question 74.
________ offers the password facility.
a) Windows
b) Linux
c) Windows and Linux
d) None of these
Answer:
c) Windows and Linux

Question 75.
________ security is an indefinable one.
a) File access level
b) System level
c) Network level
d) All the above
Answer:
c) Network level

Question 76.
The people from all over the world try to provide ________ security.
a) File access level
b) System level
c) Network level
d) All the above
Answer:
c) Network level

Question 77.
The Operating Systems should be ________.
a) patience
b) error free
c) robust
d) none of these
Answer:
c) robust

Question 78.
When there is a fault, the ________ should not crash.
a) application program
b) operating system
c) data
d) none of these
Answer:
b) operating system

Question 79.
The operating system manages the ________ on a computer.
a) files
b) folders
c) directory systems
d) all the above
Answer:
d) all the above

Question 80.
Any type of data in a computer is stored in the form of ________.
a) blocks
b) files
c) archives
d) none of these
Answer:
b) files

Question 81.
FAT stands for ________.
a) File Allocation Task
b) File Authentication Table
c) Fixed Allocation Table
d) File Allocation Table
Answer:
d) File Allocation Table

Question 82.
The FAT stores general information about files like ________.
a) filename and type
b) size
c) starting address and access mode
d) all the above
Answer:
d) all the above

Question 83.
________ is the file access mode.
a) sequential
b) indexed / indexed-sequential
c) direct/relative
d) all the above
Answer:
d) all the above

Question 84.
The ________ of the operating system helps to create, edit, copy, allocate memory to the files and also updates the FAT.
a) system agent
b) file agent
c) file supervisor
d) file manager
Answer:
d) file manager

Question 85.
ext2 stands for ________.
a) secondary extended file system
b) second extended folder system
c) second extended file scheme
d) second extended file system
Answer:
d) second extended file system

Question 86.
ext2 used in ________.
a) Linux
b) MSDOS
c) Unix
d) none of these
Answer:
a) Linux

Question 87.
NTFS stands for ________.
a) New Technology Focus System
b) New Technology File System
c) New Technology Filter System
d) New Trend File system
Answer:
b) New Technology File System

Question 88.
NTFS developed by ________.
a) Apple
b) IBM
c) Intel
d) Microsoft
Answer:
d) Microsoft

Question 89.
________ has two or more processors for a single running process.
a) Mega processing
b) Micro processing
c) Multi-processing
d) Mixed-processing
Answer:
c) Multi-processing

Question 90.
Processing takes place in parallel is known as __________ processing.
a) parallel processing
b) distributed processing
c) parent
d) none of these
Answer:
a) parallel processing

Question 91.
________ feature is used for high speed execution which increases the power of computing.
a) parallel processing
b) distributed processing
c) multi-processing
d) none of these
Answer:
a) parallel processing

Question 92.
________ allows execution of multiple tasks or processes concurrently.
a) Extended processing
b) Time sharing
c) Batch processing
d) None of these
Answer:
b) Time sharing

Question 93.
In ________ each task a fixed time is allocated.
a) Extended processing
b) Time sharing
c) Batch processing
d) None of these
Answer:
b) Time sharing

Question 94.
In ________ the processor switches rapidly between various processes after a time is elapsed or the process is completed.
a) Extended processing
b) Time sharing
c) Batch processing
d) None of these
Answer:
b) Time sharing

Question 95.
________ feature takes care of the data and application that are stored and processed on multiple physical locations across the world over the digital network.
a) Multi user OS
b) Distributed OS
c) Singe user OS
d) None of these
Answer:
b) Distributed OS

Question 96.
________ is used to access shared data and files that reside in any machine around the world.
a) Multi user OS
b) Distributed OS
c) Singe user OS
d) None of these
Answer:
b) Distributed OS

Question 97.
In ________ OS the user can handle the data from different locations.
a) Multiuser OS
b) Distributed OS
c) Singe user OS
d) None of these
Answer:
b) Distributed OS

Question 98.
________ is the advantage of distributed Operating System.
a) A user at one location can make use of all the resources available at another location over the network.
b) Many computer resources can be added easily in the network
c) Improves the interaction with the customers and clients.
d) All the above
Answer:
d) All the above

Question 99.
________ reduces the load on the host computer.
a) Multi user OS
b) Distributed OS
c) Singe user OS
d) None of these
Answer:
b) Distributed OS

Question 100.
Prominent OS is ________.
a) UNIX and Windows
b) Linux
c) iOS and Android
d) All the above
Answer:
d) All the above

Question 101.
Modem operating systems use a ________.
a) command mode interaction
b) GUI
c) visual
d) none of these
Answer:
b) GUI

Question 102.
OS can be ________.
a) Proprietary with a commercial license
b) Open source
c) Either A or B
d) None of these
Answer:
c) Either A or B

Question 103.
________ is a proprietary with a commercial license OS.
a) Microsoft Windows
b) Apple Mac OS
c) Apple iOS
d) All the above
Answer:
d) All the above

Question 104.
________ is a open source free license OS.
a) Unix
b) Linux
c) Google’s Android
d) All the above
Answer:
d) All the above

Question 105.
Unix derive originally from ________.
a) Borland International
b) AT&T Bell Labs
c) Intel
d) None of these
Answer:
b) AT&T Bell Labs

Question 106.
The development of the Unix began in the year ________.
a) 1960
b) 1966
c) 1970
d) 1976
Answer:
c) 1970

Question 107.
The Unix was developed by ________.
a) Ken Thompson
b) Dennis Ritchie
c) Both A and B
d) Bjarne Stroustroop
Answer:
c) Both A and B

Question 108.
________ OS can be modified and distributed by anyone around the world.
a) MSDOS
b) Windows
c) Linux
d) None of these
Answer:
c) Linux

Question 109.
Most of the servers run on Linux because ________.
a) it is easy to customize
b) it is rigid
c) it is not case sensitive
d) None of these
Answer:
a) it is easy to customize

Question 110.
________ is Linux distributor.
a) Ubuntu
b) Mint
c) Fedora
d) All the above
Answer:
d) All the above

Question 111.
________ is Linux distributor.
a) RedHat
b) Debian
c) Google’s Android
d) All the above
Answer:
d) All the above

Question 112.
________ is Linux distributor.
a) Chrome OS
b) Chromium OS
c) Both A and B
d) MSDOS
Answer:
c) Both A and B

Question 113.
The Linux operating system was originated in the year ________.
a) 1990
b) 1991
c) 1890
d) 1980
Answer:
b) 1991

Question 114.
The Linux operating system was developed by ________.
a) Ken Thompson
b) Dennis Ritchie
c) Linus Torvalds
d) Bjarne Stroustroop
Answer:
c) Linus Torvalds

Question 115.
Linux is similar to the ________ operating system.
a) Windows
b) UNIX
c) MSDOS
d) None of these
Answer:
b) UNIX

Question 116.
Unix and the C programming language were developed by ________.
a) Borland International
b) AT&T Bell Labs
c) Intel
d) None of these
Answer:
b) AT&T Bell Labs

Question 117.
________ OS is primarily targeted to Intel and AMD architecture based computers.
a) Windows
b) UNIX
c) MSDOS
d) None of these
Answer:
a) Windows

Question 118.
________ is a Windows-alternative open source operating system.
a) RearOS
b) ReachOS
c) ReactOS
d) None of these
Answer:
c) ReactOS

Question 119.
________ is a mobile device.
a) phones
b) tablets
c) MP3 players
d) All the above
Answer:
d) All the above

Question 120.
Android is a mobile operating system developed by
a) Borland International
b) AT&T Bell Labs
c) Intel
d) Google
Answer:
d) Google

Question 121.
________ OS is designed primarily for touch screen mobile devices such as smart phones and tablets.
a) Windows
b) UNIX
c) MSDOS
d) Android
Answer:
d) Android

Question 122.
Google has developed ________ for televisions.
a) Android Wear
b) Android Car
c) Android TV
d) None of these
Answer:
a) Android Wear

Question 123.
Google has developed ________ for cars.
a) Android Auto
b) Android Car
c) Android TV
d) None of these
Answer:
a) Android Auto

Question 124.
Google has developed ________ for wrist watches.
a) Android Wear
b) Android Car
c) Android TV
d) None of these
Answer:
a) Android Wear

Question 125.
Google has developed separate Android for ________.
a) game consoles
b) digital cameras
c) PCs
d) All the above
Answer:
d) All the above

Question 126.
________ is an Android version.
a) Alpha and Beta
b) Cupcake and Donut
c) Eclair and Froyo
d) All the above
Answer:
d) All the above

Question 127.
________ is an Android version.
a) Gingerbread
b) Honeycomb
c) Ice cream Sandwich
d) All the above
Answer:
d) All the above

Question 128.
________ is an Android version.
a) Jelly Bean
b) Kitkat and Lollipop
c) Marshmallow and Nought
d) All the above
Answer:
d) All the above

Question 129.
________ is a mobile Operating System created and developed by Apple Inc.
a) Android
b) iOS
c) Unix
d) None of these
Answer:
b) iOS

Question 130.
________ is a mobile Operating System created and developed only for harware of Apple iPhone.
a) Android
b) iOS
c) Unix
d) None of these
Answer:
b) iOS

Question 131.
________ is the second most popular mobile Operating System globally.
a) Android
b) iOS
c) Unix
d) None of these
Answer:
b) iOS

Question 132.
________ is the top most popular mobile Operating System globally.
a) Android
b) iOS
c) Unix
d) None of these
Answer:
a) Android

Question 133.
is the logo of ________ OS
a) Windows 7
b) Windows 8
c) MAc OS
d) None of these
Answer:
b) Windows 8

Questions 134.
is the logo of ________ OS
a) Windows 7
b) Windows 8
c) MAc OS
d) None of these
Answer:
c) MAc OS

Questions 135.
is the logo of ________ OS.d
a) Linux
b) Windows 8
c) MAc OS
d) None of these
Answer:
a) Linux

Questions 136.
is the logo of ________ OS
a) Windows 7
b) Windows 8
c) MAc OS
d) None of these
Answer:
b) Windows 8

Questions 137.
is the logo of ________ OS
a) Android
b) Apple iOS
c) MAc OS
d) None of these
Answer:
a) Android

Questions 138.
is the logo of ________ OS
a) Android
b) Apple iOS
c) MAc OS
d) Unix
Answer:
d) Unix

Part – II

Short Answers

Question 1.
What is software?
Answer:
A software is set of instructions that perform specific task. It interacts basically with the hardware to generate the desired output.

Question 2.
What are the classifications of software? Software is classified into two types:
Answer:

1. Application Software.
2. System Software.

Question 3.
What is application software?
Answer:
Application software is a set of programs to perform specific task. For example MS-word is an application software to create text document.

Question 4.
What is system software?
Answer:
System software is a type of computer program that is designed to run the computer’s hardware and application programs.

Example : Operating System.

Question 5.
List any 4 application software.
Answer:

1. MS-Word.
2. VLC player.
3. MS-Excel.
4. MS-Access.

Question 6.
List any 4 system software.
Answer:

1. Operating System.
2. Language Processor.
3. Compiler.
4. Loader.

Question 7.
Which serves as an interface between a user and a computer?
Answer:
An Operating System (OS) is a system software which serves as an interface between a user and a computer.

Question 8.
What are the f unctions of an operating system?
Answer:
The functions of an Operating System include file management, memory management, process management and device management and many more.

Question 9.
What are the popular operating systems used in personal computers and laptops?
Answer:
The popular Operating Systems used in personal computers and laptops are Windows, UNIX and Linux.

Question 10.
What are the popular operating systems used in mobile devices?
Answer:
The mobile devices mostly use Android and iOS as mobile OS.

Question 11.
What are the prominent operating Systems? Prominent OS are as follows:
Answer:

1. UNIX.
2. Microsoft Windows.
3. Linux.
4. iOS.
5. Android.

Question 12.
How OS cars be developed and released?
Answer:
OS can be either proprietary with a commercial license or can be open source.

Question 13.
Write note on React OS.
Answer:
React OS is a Windows-alternative open source operating system, which is being developed on the principles of Windows – without using any of Microsoft’s code..

Question 14.
Write note on Microsoft Windows.
Answer:
Microsoft Windows is a family of proprietary operating systems designed by Microsoft Corporation and primarily targeted to Intel and AMD architecture based computers.

Question 15.
Which OS is used to build a cheap computer?
Answer:
Build a cheap computer with raspbion OS and a Raspberry Pi.

Question 16.
Write about raspbion OS.
Answer:
Raspbion OS is a platform that’s designed to teach how to build a computer, what every part of a circuit board does, and finally how to code apps or games. The platform is available in pre-designed kits.

Question 17.
Write not on User Interface.
Answer:
User interface is one of the significant features in Operating System. The only way that user can make interaction with a computer. If the computer interface is not user-friendly, the user slowly reduces the computer usage from their normal life.

Question 18.
What is the objective of memory management?
Answer:
The objective of Memory Management process is to improve both the utilization of the CPU and the speed of the computer’s response to its users via main memory.

Question 19.
What is process management?
Answer:
Process management is function that includes creating and deleting processes and providing mechanisms for processes to communicate and synchronize with each other.

Question 20.
What is process? Give an exampe.
Answer:
A process is the unit of work in a computer. A word¬processing program being run by an individual user on a computer is a process.

Question 21.
Give any two examples for a process. Examples:
Answer:

A word-processing program being run by an individual user on a computer.
System task, such as sending output to a printer or screen.

Question 22.
What are the classification of a process?
Answer:
A computer consists of a collection of processes. They are classified as h/vo categories:

Operating System processes which is executed by system code.
User Processes which is execute by user code.

Question 23.
What are the requirements of a process?
Answer:
A process needs certain resources including CPU time, memory, files and I/O devices to finish its task.

Question 24.
What is the major challenge in computer and software industry?
Answer:
The major challenge in computer and software industry is to protect user’s legitimate data from hackers.

Question 25.
Explain File Access level security.
Answer:
In order to access the files created by other people, you should have the access permission. Permissions can either be granted by the creator of the file or by the administrator of the system.

Question 26.
How will you offer system level security?
Answer:
System level security is offered by the password in a multi-user environment.

Question 27.
Which OS offers system level security?
Answer:
Both windows and Linux offer the password facility to enable system level security.

Question 28.
Write note on network level security.
Answer:
Network security is an indefinable one. So people from all over the world try to provide such a security.

Question 29.
Write note on Fault Tolerance.
Answer:
Fault Tolerance: The Operating Systems should be robust. When there is a fault, the Operating System should not crash, instead the Operating System have fault tolerance capabilities and retain the existing state of system.

Question 30.
How data is stored in computer?
Answer:
Any type of data in a computer is stored in the form of files and directories/foiders through File Allocation Table (FAT).

Question 31.
What will be stored in FAT?
Answer:
The FAT stores general information about files like filename, type (text or binary), size, starting address and access mode.

Question 32.
What are the various file access mode?
Answer:
File access modes are:

1. Sequential.
2. Indexed.
3. Indexed-sequential.
4. Direct.
5. Relative.

Question 33.
Write note on file manager.
Answer:
The file manager of the operating system helps to create, edit, copy, allocate memory to the files and also updates the FAT,

Question 34.
What is multi -process?
Answer:
This is a one of the features of Operating System, It has two or more processors for a single running process. Each processor works on different parts of , the same task or on two or more different tasks. This feature is used for high speed execution which increases the power of computing.

Question 35.
Write note on parallel processing.
Answer:
Processing takes place in parallel is known as parallel processing.

Question 36.
Write note on Time Sharing,
Answer:
It allows execution of multiple tasks or processes concurrently. For each task a fixed time is allocated. This division of time is called Time- sharing.

Question 37.
Why distributed operating system is used?
Answer:
The Distributed Operating System is used to access shared data and files that reside in any machine around the world.

Question 38.
What are the advantages of GUI?
Answer:
A GUI lets you use your mouse to click icons, buttons, menus and everything is clearly displayed on the screen using a combination of graphics and text elements.

Question 39.
What are the key features of OS?
Answer:
Features of the Operating System:

Question 40.
What devices are controlled by OS?
Answer:
OS controls input, output and other peripheral devices such as disk drives, printers and electronic gadgets.

Part – III

Explain In Brief

Question 1.
Write note on GUI.
Answer:
Modern operating systems use a Graphical User Interface(GUI). A GUI lets you use your mouse to click icons, buttons, menus and everything is clearly displayed on the screen using a combination of graphics and text elements. Each Operating System’s GUI has a different look and feel. The modern Operating Systems are designed to be ease of use and most of the basic principles are the same.

Question 2.
List various OS with their symbol.
Answer:
Various Operating Systems:

Question 3.
Explain the classification of Operating Systems according to availability.
Answer:
Classification of Operating Systems according to availability.

Question 4.
Who developed the LINUX? Where it was developed?
Answer:
UNIX is a family of multitasking, multi-user operating systems that derive originally from AT&T Bel! Labs, where the development began in the 1970s by Ken Thompson and Dennis Ritchie.

Question 5.
List the various Linux distributions.
Answer:
Linux Distributions:

Question 6.
Explain the Operating systems for mobile devices?
Answer:
Mobile devices such as phones, tablets and MP3 players are different from desktop and laptop computers and hence they need special Operating Systems. Examples of mobile Operating Systems are Apple iOS and Google Android.

Operating systems for mobile devices generally are not as fully featured as those made for desktop and laptop computers and they are not able to run all software.

Question 7.
Explain Android OS.
Answer:
Android:
Android is a mobile operating system developed by Google, based on Linux and designed primarily for touch screen mobile devices such as smart phones and tablets. Google has further developed Android TV for televisions, Android Auto for cars and Android Wear for wrist watches, each with a specialized user interface. Variants of Android are also used on game consoles, digital cameras, PCs and other electronic gadgets.

Question 8.
What are the various Android versions?
Answer:

Question 9.
Explain iOS – iPhone OS.
Answer:
iOS (formerly iPhone OS) is a mobile. Operating System created and developed by Apple Inc., exclusively for its hardware. It is the Operating System that presently powers many of the company’s mobile devices, including the iPhone, iPad and iPod Touch.

Question 10.
What are the points are considered when User Interface is designed for an application.
Answer:
The following points are considered when User Interface is designed for an application:

1. The user interface should enable the user to retain this expertise for a longer time.
2. The user interface should also satisfy the customer based on their needs.
3. The user interface should save user’s precious time. Create graphical elements like Menus,Window,Tabs,
4. Icons and reduce typing work will be an added advantage of the Operating System.
5. The ultimate aim of any product is to satisfy the customer. The User Interface is also to satisfy the customer.
6. The user interface should reduce number of errors committed by the user with a little practice the user should be in a position to avoid errors.

Question 11.
Explain memory management.
Answer:
Memory Management:
Memory Management is the process of controlling and coordinating computer’s main memory and assigning memory block (space) to various running programs to optimize overall computer performance.

The Memory management involves the allocation of specific memory blocks to individual programs based on user demands. At the application level, memory management ensures the availability of adequate memory for each running program at ail times.

Question 12.
What are the responsibilities of the Operating System in . connection with memory management?
Answer:
The Operating System is responsible for the following activities in connection with memory management:

1. Keeping track of which portion of memory are currently being used and who is using them.
2. Determining which processes and data to move in and out of memory.
3. Allocation and de-aliocation of memory blocks as needed by the program in main memory.

Question 13.
What are the responsibilities of the Operating System in connection with process management?
Answer:
The Operating System is responsible for the following activities associated with the process management:

1. Scheduling processes and threads on the CPUs.
2. Creating and deleting both user and system processes.
3. Suspending and resuming processes.
4. Providing mechanisms for process synchronization.
5. Providing mechanisms for process communication.

Question 14.
Explain File Management.
Answer:
File Management:
File management is an important function of OS which handles the data storage techniques. The operating System manages the files, folders and directory systems on a computer.

Any type of data in a computer is stored in the form of files and directories/folders through File Allocation Table (FAT). The FAT stores general information about files like filename, type (text or binary), size, starting address and access mode (sequential/indexed/indexed-sequential/direct/ relative).

The file manager of the operating system helps to create, edit, copy, allocate memory to the files and also updates the FAT. The OS also takes care of the files that are opened with proper access rights to read or edit them.

There are few other file management techniques available like Next Generation File System (NTFS) and ext2 (Linux).

Question 15.
Explain Time Sharing with an example.
Answer:
This is a one of the features of Operating Systems. It allows execution of multiple tasks or processes concurrently. For each task a fixed time is allocated. This division of time is called Time-sharing. The processor switches rapidly between various processes after a time is elapsed or the process is completed.

For example assume that there are three processes called PI, P2, P3 and time allocated for each process 30, 40, 50 minutes respectively. If the process PI completes
within 20 minutes then processor takes the next process P2 for the execution. If the process P2 could not complete within 40 minutes, then the current process P2 will be paused and switch over to the next process P3.

Part – IV

Explain In Detail

Question 1.
What is the Need for Operating System? Explain in details.
Answer:
Operating System has become essential to enable the users to design applications without the knowledge of the computer’s internal structure of hardware. Operating System manages all the Software and Hardware.

Most of the time there are many different computer programmes running at the same time, they all need to access the Computers, CPU, Memory and Storage. The need of Operating System is basically – an interface between the user and hardware.

Interaction of Operating system and user:

Operating System works as translator, while it translates the user request into machine language (Binary language), processes it and then sends it back to Operating System. Operating System converts processed information into user readable form.

Question 2.
What are the uses of Operating System?
Answer:
The main use of Operating System is:

1. To ensure that a computer can be used to extract what the user wants it do.
2. Easy interaction between the users and computers.
3. Starting computer operation automatically when power is turned on (Booting).
4. Controlling Input and Output Devices.
5. Manage the utilization of main memory.
6. Providing security to user programs.

Question 3.
Explain the various types of operating system.
Answer:
Operating System are classified into the following types depending on their processing capabilities.

Single User Operating Systems : An operating system allows only a single user to perform a task at a time. It is called as a Single user and single Task operating system.

For a user, a task is a function such as printing a document, writing a file to disk, editing a file or downloading a file etc. MS-DOS is an example for a single user and single task Operating System.

Multi-user Operating Systems:
It is used in computers and laptops that allow same data and applications to be accessed by multiple users at the same time. The users can also communicate with each other. Windows, Linux and UNIX are examples for multi-user Operating System.

Question 4.
Explain distributed operating system.
Answer:
This feature takes care of the data and application that are stored and processed on multiple physical locations across the world over the digital network. The Distributed Operating System is used to access shared data and files that reside in any machine around the world. The user can handle the data from different locations. The users can access as if it is available on their own computer.

The advantages of distributed Operating System are as follows:

1. A user at one location can make use of all the resources available at another location over the network.
2. Many computer resources can be added easily in the network.
3. Improves the interaction with the customers and clients.
4. Reduces the load on the host computer.

Question 5.
Explain the various algorithms of process management.
Answer:
The following algorithms are mainly used to allocate the job (process) to the processor.

1. FIFO
2. SJF
3. Round Robin
4. Based on Priority

FIFO (First In First Out) Scheduling:
This algorithm is based on queuing technique. Assume that a student is standing in a queue to get grade sheet from his/her teacher. The other student who stands first in the queue gets his/her grade sheet first and leaves from the queue. Followed by the next student in the queue gets it collected and so on. This is the basic logic of the FIFO algorithm.

Technically, the process that enters the queue first is executed first by the CPU, followed by the next and so on. The processes are executed in the order of the queue.

SJF (Shortest Job First)Scheduling:
This algorithm works based on the size of the job being executed by the CPU.
Consider two jobs A and B.
A = 6 kilo bytes,
B = 9 kilo bytes.
First the job “A” will be assigned and then job “B” gets its turn.

Round Robin Scheduling:
The Round Robin (RR) scheduling algorithm is designed especially for time sharing systems. Jobs (processes) are assigned and processor time in a circular method. For example take three jobs A, B, C. First the job A is assigned to CPU then job B and job C and then again A, B and C and so on.

Based On Priority:
The given job (process) is assigned based on a Priority. The job which has higher priority is more important than other jobs. Take two jobs A and B. Let the priority of A be 5 and priority B be 7. Job B is assigned to the processor before job A.