Top interview questions | Practice Quiz, MCQ Questions | Solutions for interview

Question 1

What is the purpose of the "Operating System"?

1

Perform calculations

2

Manage hardware and software resources

3

Develop applications

4

Create websites

Question 2

Which of the following is NOT an operating system?

1

Oracle

2

Linux

3

Windows

4

macOS

Question 3

Which of the following is an example of a real-time operating system?

1

Windows 10

2

Linux Ubuntu

3

macOS

4

RTOS (Real-Time Operating System)

Question 4

What is the function of a kernel in an operating system?

1

Manages system calls and resources

2

Provides a graphical interface

3

Compiles application code

4

Stores user files

Question 5

Which scheduling algorithm is used in time-sharing systems?

1

Shortest Job Next (SJN)

2

First-Come, First-Served (FCFS)

3

Round Robin (RR)

4

Priority Scheduling

Question 6

What is thrashing in an operating system?

1

Excessive swapping of processes between RAM and disk

2

The process of terminating a program

3

A technique to enhance CPU performance

4

A method for optimizing memory usage

Question 7

What is virtual memory?

1

A memory management technique that provides an illusion of a larger RAM

2

A part of hard disk used as RAM

3

A cache memory for fast processing

4

The physical memory of a system

Question 8

Which of the following is NOT an active process scheduling state?

1

Running

2

Terminated

3

Blocked

4

Ready

Question 9

Which file system is used by Windows operating systems?

1

FAT32

2

ext4

3

Both FAT32 and NTFS

4

NTFS

Question 10

What is the purpose of a device driver?

1

To allow the OS to communicate with hardware

2

To manage user permissions

3

To execute application programs

4

To enhance the CPU speed

Question 11

Which of the following is an example of a network operating system?

1

Windows Server

2

Linux

3

Windows 7

4

MS-DOS

Question 12

What is the primary function of the bootloader?

1

Manage disk partitions

2

Load the operating system into memory

3

Execute application programs

4

Detect hardware failures

Question 13

What is the main advantage of a multi-user operating system?

1

Requires less hardware resources

2

Faster execution of programs

3

It does not need scheduling

4

Supports multiple users accessing the system simultaneously

Question 14

What is the difference between paging and segmentation?

1

Segmentation is used only in UNIX systems

2

Paging reduces fragmentation, segmentation increases it

3

Paging is slower than segmentation

4

Paging divides memory into fixed-size blocks, segmentation divides it into variable-size blocks

Question 15

Which of the following is NOT a type of operating system?

1

Batch OS

2

Compiler OS

3

Distributed OS

4

Time-sharing OS

Question 16

Which process scheduling algorithm is starvation-free?

1

First-Come, First-Served (FCFS)

2

Shortest Job Next (SJN)

3

Round Robin

4

Priority Scheduling

Question 17

What is the function of a semaphore in an operating system?

1

Disk scheduling

2

Process synchronization

3

Deadlock detection

4

Memory management

Question 18

What is a deadlock?

1

A method of memory allocation

2

A situation where processes are waiting for each other indefinitely

3

A type of file management system

4

A situation where a process executes continuously

Question 19

What is the Banker’s algorithm used for?

1

Process scheduling

2

Disk scheduling

3

Deadlock avoidance

4

Memory allocation

Question 20

What is swapping in an operating system?

1

Moving processes between main memory and disk

2

Exchanging data between two processes

3

Terminating processes when memory is full

4

Exchanging registers between CPU and memory

Question 21

Which of the following is an example of a distributed operating system?

1

Linux Mint

2

Windows 10

3

Amoeba

4

MS-DOS

Question 22

What is the main advantage of using a spooling system in OS?

1

Faster memory access

2

Reduces power consumption

3

Allows multiple processes to use I/O devices efficiently

4

Increases CPU clock speed

Question 23

In which memory allocation technique does the process get the largest available block?

1

First Fit

2

Worst Fit

3

Next Fit

4

Best Fit

Question 24

What is the purpose of RAID in operating systems?

1

Improve file compression

2

Increase RAM speed

3

Provide redundancy and performance in storage systems

4

Reduce CPU usage

Question 25

Which of the following techniques is used to prevent deadlock?

1

Mutual exclusion

2

Circular wait

3

Hold and wait

4

Resource allocation graph with a cycle

Question 26

Which memory management technique suffers from external fragmentation?

1

Demand paging

2

Segmentation

3

Virtual memory

4

Paging

Question 27

In multi-threading, which model allows user threads to be mapped to multiple kernel threads?

1

One-to-One Model

2

Many-to-One Model

3

Single-Thread Model

4

Many-to-Many Model

Question 28

Which page replacement algorithm suffers from Belady's Anomaly?

1

Optimal Page Replacement

2

LRU

3

FIFO

4

Least Frequently Used (LFU)

Question 29

What is the main function of an interrupt in an operating system?

1

Allocate memory

2

Execute user programs

3

Optimize CPU scheduling

4

Handle asynchronous events

Question 30

What is the fork() system call used for in Unix/Linux?

1

To allocate memory

2

To terminate a process

3

To execute system commands

4

To create a new process