Operating System Questions with solutions MCQs

1. BIOS stands for

A

Basic input output software

B

Basic input operating system

C

Basic input output system

D

None of these

Operating System Computer Science VERIFIED
Correct Answer : C
Explanation :

BIOS : Basic Input Output System

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2. Which one of the following is NOT an open source operating system?

A

Windows

B

FreeBSD

C

Android

D

Linux

Operating System Computer Science VERIFIED
Correct Answer : A
Explanation :

Windows : Licensed Operating System
FreeBSD , Android , Linux are open source operating systesms.

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3. Which of the following is/are the main function(s) of an operating system?
i) Manage the Processor and assign tasks which are to be performed.
ii) Allocate memory and storage areas to the system and user programs and data.
iii) Control , Co-ordinate various input and output devices.
iv) Accessing world wide web without internet connectivity

A

i, ii

B

i, ii, iii

C

i, ii, iii, iv

D

iii, iv

Operating System Computer Science VERIFIED
Correct Answer : B
Explanation :

Important functions of an operating System:
Security
Control over system performance
Job accounting
Error detecting aids
Coordination between other software and users
Memory Management
Processor Management
Device Management

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4. Operating System can be installed from the following resources

A

Disk

B

Network

C

Remote Installation

D

All of the above

Operating System Computer Science VERIFIED
Correct Answer : D
Explanation :

operating system can be installed from any of the given three options, hence correct option is all of the above

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5. Ability of an operating system to control activities of multiple programs at same time is called

A

Mutlitasking

B

Mutli Processing

C

Mutli Operating

D

Mutli Paging

Operating System Computer Science VERIFIED
Correct Answer : A
Explanation :

n computing, multitasking is the concurrent execution of multiple tasks over a certain period of time. New tasks can interrupt already started ones before they finish, instead of waiting for them to end.

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6. What is the process of pressing and releasing left mouse button quickly in Windows called?

A

Dropping

B

Pointing

C

Clicking

D

Dragging

Operating System Computer Science VERIFIED
Correct Answer : C
Explanation :

Pressing and releasing the left mouse button is called clicking the mouse.
Pressing and releasing the left mouse button is called the left click

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7. Which are the computer devices which are automatically detected by Windows called?

A

Automatic Devices

B

Plug and Play Devices

C

Serial Devices

D

Installed Devices

Operating System Computer Science VERIFIED
Correct Answer : B
Explanation :

Computer devices which are automatically detected by windows are called plug and play devices

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8. Which Interface is used by Windows?

A

Menu Deriven Interface

B

Command Deriven Interface

C

Graphical User Interface

D

Prompt Interface

Operating System Computer Science VERIFIED
Correct Answer : C
Explanation :

Windows uses Graphical User Interface

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9. Which of the following scheduling algorithms suffers from convoy effect?

A

Round Robin Algorithm

B

First come First serve algorithm

C

Shortest Job First Algorithm

D

Priority Algorithm

Operating System Computer Science VERIFIED
Correct Answer : B
Explanation :

FCFS algorithm is non-preemptive in nature, that is, once CPU time has been allocated to a process, other processes can get CPU time only after the current process has finished. This property of FCFS scheduling leads to the situation called Convoy Effect.

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10. A small piece of code which is used to initialize all devices as soon as power is switched on is known as

A

Blackstrap

B

Bootstrap

C

Boot Sector Virus

D

Device Driver

Operating System Computer Science VERIFIED
Correct Answer : B
Explanation :

The Master Boot Record (MBR) or Bootstrap is a small program that starts when the computer is booting, in order to find the operating system

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11. Which of the following windows operating system mode operations provides us with means for protecting the operating system for errant users?

A

Exit

B

Dual

C

Trap

D

Debug

Operating System Computer Science VERIFIED
Correct Answer : B
Explanation :

The dual mode of operation provides us with the means for protecting the operating system from errant users—and errant users from one another. ... Initial control is within the operating system, where instructions are executed in kernel mode. When control is given to a user application, the mode is set to user mode.

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12. To boot a computer means loading computer with

A

Compiler

B

Linker

C

Assembler

D

Operating System

Operating System Computer Science VERIFIED
Correct Answer : D
Explanation :

The boot process loads the operating system into main memory or the random access memory

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13. Both M:M and Two level models require communication maintain the appropriate number of kernel threads allocated to the application. This can be achieved by using

A

Lightweight processor

B

Light Processor

C

Logical Processor

D

Microprocessor

Operating System Computer Science VERIFIED
Correct Answer : A
Explanation :

Lightweight processor

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14. If an operating system is capable of running a program or more than one processor at a time. Which type of feature it has?

A

Multitasking

B

Multiuser

C

Parallel Processing

D

GUI

Operating System Computer Science VERIFIED
Correct Answer : A
Explanation :

Multitasking - Multitasking is the ability of an operating system to execute more than one task simultaneously on single processor machine, these multiple tasks share common resources such as CPU and memory.

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15. Linux is a

A

Multi user operating system

B

single user operating system

C

real time operating system

D

batch processing operating system

Operating System Computer Science VERIFIED
Correct Answer : A
Explanation :

Linux is a multi user operating system. Multi user operating system refers to the particular system which can be accessed by more than one person and by only one operating system on it.

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16. Which of the following services are NOT provided by operating system?

A

Memory Management

B

People Management

C

Device Management

D

Process Management

Operating System Computer Science VERIFIED
Correct Answer : B
Explanation :

People Management

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17. Thread is a

A

Heavy weight process

B

Light weight process

C

Multi process

D

I/O process

Operating System Computer Science VERIFIED
Correct Answer : B
Explanation :

Threads are sometimes called lightweight processes because they have their own stack but can access shared data. Because threads share the same address space as the process and other threads within the process, the operational cost of communication between the threads is low, which is an advantage

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18. Operating system acts as an interface between

A

Hardware and Software

B

RAM and CPU

C

Input and Output devices

D

Motherboard and display

Operating System Computer Science VERIFIED
Correct Answer : A
Explanation :

An operating system is a program that acts as an interface between the user and the computer hardware and controls the execution of all kinds of programs.

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19. Which of the following describes switching and giving multiple programs a certain timeframe to execute

A

Program Management

B

Multitasking

C

Thrashing

D

Fragmentation

Operating System Computer Science VERIFIED
Correct Answer : B
Explanation :

In computing, multitasking is the concurrent execution of multiple tasks (also known as processes) over a certain period of time. New tasks can interrupt already started ones before they finish, instead of waiting for them to end. As a result, a computer executes segments of multiple tasks in an interleaved manner, while the tasks share common processing resources such as central processing units (CPUs) and main memory. Multitasking automatically interrupts the running program, saving its state (partial results, memory contents and computer register contents) and loading the saved state of another program and transferring control to it. This "context switch" may be initiated at fixed time intervals (pre-emptive multitasking), or the running program may be coded to signal to the supervisory software when it can be interrupted (cooperative multitasking).

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20. What is called as the heart of the operating system, which provides the basic foundation, memory management, file systems, program execution?

A

ALU

B

Paging

C

Kernel

D

Shell

Operating System Computer Science VERIFIED
Correct Answer : C
Explanation :

The kernel is the heart of the operating system which provides a set of tools that are used. by system calls.

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21. Which of the following is a system software?

A

Microsoft Word

B

Antivirus Software

C

Operating System

D

Office Suite Software

Operating System Computer Science VERIFIED
Correct Answer : C
Explanation :

The operating system (OS) is the best-known example of system software. The OS manages all the other programs in a computer. According to some definitions, system software also includes system utilities, such as the disk defragmenter and System Restore, and development tools such as compilers and debuggers.

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22. Which of the following defines a sequence of instructions written to solve a problem?

A

Software

B

Hardware

C

Program

D

Process

Operating System Computer Science VERIFIED
Correct Answer : C
Explanation :

A program is a sequence of instructions written to solve a particular problem.

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23. Which of the following characteristics of operating system is also called as I/O controller?

A

Device management

B

Processor management

C

Memory management

D

File management

Operating System Computer Science VERIFIED
Correct Answer : A
Explanation :

Device management

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24. Which was the first OS to manage buffers, provide program sharing, and allow execution of assembly language programs?

A

Distributed operating system

B

Centralized operating system

C

BIND operating system

D

SHARE operating system

Operating System Computer Science VERIFIED
Correct Answer : D
Explanation :

SHARE became the standard OS for IBM computers in the late 1950s. The SHARE Operating System (SOS) was the first OS to manage buffers, provide program sharing, and allow execution of assembly language programs. "Managing Buffers" relate to a form of "Managing Memory".

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25. What is LINUX?

A

Malware

B

Operating System

C

Application Program

D

Firmware

Operating System Computer Science VERIFIED
Correct Answer : B
Explanation :

Operating System

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26. Which type of software is an operating system?

A

Utility Software

B

System Software

C

Application Software

D

Firmware Software

Operating System Computer Science VERIFIED
Correct Answer : B
Explanation :

System Software

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27. If CPU executes multiple programs simultaneously, it will be known as?

A

Multiprocessing

B

Multitasking

C

Timesharing

D

Multiprogramming

Operating System Computer Science VERIFIED
Correct Answer : B
Explanation :

In computing, multitasking is a method by which multiple tasks, also known as processes, share common processing resources such as a CPU. With a multitasking OS, you can simultaneously run multiple applications. Multitasking refers to the ability of the OS to quickly switch between each computing task to give the impression the different applications are executing multiple actions simultaneously.

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28. Which among following is responsible for finding and loading the operating system into RAM?

A

Bootstrap Loader

B

CMOS

C

BIOS

D

DMOS

Operating System Computer Science VERIFIED
Correct Answer : A
Explanation :

Bootstrap Loader

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29. What is another name of a client operating system?

A

Desktop operating system

B

Time Sharing operaing system

C

Real-Time operating system

D

Multiuser operating system

Operating System Health Educator set 1 VERIFIED
Correct Answer : A
Explanation :

The control program in a user`s machine (desktop or laptop). Also called a "client operating system".

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30. Statement A: Unix is an example for Simple Structure Operating System.
Statement B: The First version of Windows NT is an example for 32 bit Operating

A

Both statements A & B are false

B

Statement A is false and Statement B is true

C

Statement A is true and Statement B is false

D

Both Statements A & B are true

Operating System Health Educator set 1 VERIFIED
Correct Answer : B
Explanation :

Statement A is false and Statement B is true

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31. ___________ is an example of an OS that supports a single user process and single thread.

A

Ubuntu

B

MS-DOS

C

Windows

D

UNIX

Operating System Health Educator set 1 VERIFIED
Correct Answer : B
Explanation :

MS-DOS supports a single user process and a single thread. Some traditional UNIX systems are multiprogramming systems, thus support multiple user processes but only one execution path is allowed for each process. A Java Virtual Machine (JVM) is an example of a system of one process with multiple threads.

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32. iOS mobile Operating System was invented in the year __________.

A

2005

B

2004

C

2002

D

2007

Operating System Health Educator set 1 VERIFIED
Correct Answer : D
Explanation :

Apple launched iOS—then called iPhone OS—on June 29, 2007, with the very first iPhone.

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33. MS-DOS is a _______ bit Operating Systems.

A

16

B

32

C

64

D

8

Operating System Health Educator Set 2 VERIFIED
Correct Answer : A
Explanation :

DOS is a 16-bit, single-user operating system that does not support multi-tasking. It is far easier to administer than Unix, but less powerful. Compared to graphical interfaces such as Windows and Mac OS X

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34. Which of the following is a single user single task operating system?

A

Unix

B

Windows 95

C

Windows 2000

D

Linux

Operating System Health Educator Set 2 VERIFIED
Correct Answer : B
Explanation :

An operating system that allows a single user to perform only one task at a time is called a Single-User Single-Tasking Operating System. Functions like printing a document, downloading images, etc., can be performed only one at a time. Examples include MS-DOS, Palm OS, windows 95etc.

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35. Plug n Play feature is introduced in which version windows?

A

Windows 95

B

Windows 7

C

Windows XP

D

Windows 98

Operating System Health Educator Set 2 VERIFIED
Correct Answer : A
Explanation :

Legacy Plug and Play. In 1995, Microsoft released Windows 95, which tried to automate device detection and configuration as much as possible, but could still fall back to manual settings if necessary.

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36. Which one of the following is not a real-time operating system?

A

QNX

B

VxWorks

C

RTLinux

D

Palm OS

Operating System Finance Inspector 2024
Correct Answer : D
Explanation :

Palm OS is not a real-time operating system.

  • RTLinux, VxWorks, and QNX are all examples of real-time operating systems (RTOS):
    • RTLinux is a real-time Linux operating system.
    • VxWorks is a real-time operating system developed by Wind River Systems.
    • QNX is a real-time operating system primarily used in embedded systems.

Palm OS, on the other hand, was an operating system developed by Palm, Inc., primarily for personal digital assistants (PDAs) and later smartphones. It was not designed as a real-time operating system.

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