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

Question 1

What is the purpose of the "Operating System"?

1

Create websites

2

Perform calculations

3

Manage hardware and software resources

4

Develop applications

Question 2

Which of the following is NOT an operating system?

1

Windows

2

Linux

3

macOS

4

Oracle

Question 3

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

1

RTOS (Real-Time Operating System)

2

Windows 10

3

macOS

4

Linux Ubuntu

Question 4

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

1

Compiles application code

2

Manages system calls and resources

3

Provides a graphical interface

4

Stores user files

Question 5

Which scheduling algorithm is used in time-sharing systems?

1

First-Come, First-Served (FCFS)

2

Priority Scheduling

3

Shortest Job Next (SJN)

4

Round Robin (RR)

Question 6

What is thrashing in an operating system?

1

A technique to enhance CPU performance

2

The process of terminating a program

3

A method for optimizing memory usage

4

Excessive swapping of processes between RAM and disk

Question 7

What is virtual memory?

1

A cache memory for fast processing

2

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

3

The physical memory of a system

4

A part of hard disk used as RAM

Question 8

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

1

Terminated

2

Blocked

3

Running

4

Ready

Question 9

Which file system is used by Windows operating systems?

1

ext4

2

FAT32

3

Both FAT32 and NTFS

4

NTFS

Question 10

What is the purpose of a device driver?

1

To enhance the CPU speed

2

To execute application programs

3

To manage user permissions

4

To allow the OS to communicate with hardware

Question 11

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

1

Windows 7

2

Windows Server

3

Linux

4

MS-DOS

Question 12

What is the primary function of the bootloader?

1

Detect hardware failures

2

Load the operating system into memory

3

Manage disk partitions

4

Execute application programs

Question 13

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

1

Requires less hardware resources

2

Faster execution of programs

3

Supports multiple users accessing the system simultaneously

4

It does not need scheduling

Question 14

What is the difference between paging and segmentation?

1

Paging reduces fragmentation, segmentation increases it

2

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

3

Paging is slower than segmentation

4

Segmentation is used only in UNIX systems

Question 15

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

1

Compiler OS

2

Distributed OS

3

Batch OS

4

Time-sharing OS

Question 16

Which process scheduling algorithm is starvation-free?

1

Shortest Job Next (SJN)

2

Round Robin

3

Priority Scheduling

4

First-Come, First-Served (FCFS)

Question 17

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

1

Deadlock detection

2

Process synchronization

3

Disk scheduling

4

Memory management

Question 18

What is a deadlock?

1

A method of memory allocation

2

A situation where a process executes continuously

3

A situation where processes are waiting for each other indefinitely

4

A type of file management system

Question 19

What is the Banker’s algorithm used for?

1

Process scheduling

2

Memory allocation

3

Disk scheduling

4

Deadlock avoidance

Question 20

What is swapping in an operating system?

1

Terminating processes when memory is full

2

Moving processes between main memory and disk

3

Exchanging registers between CPU and memory

4

Exchanging data between two processes

Question 21

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

1

MS-DOS

2

Linux Mint

3

Amoeba

4

Windows 10

Question 22

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

1

Allows multiple processes to use I/O devices efficiently

2

Reduces power consumption

3

Faster memory access

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

Reduce CPU usage

3

Provide redundancy and performance in storage systems

4

Increase RAM speed

Question 25

Which of the following techniques is used to prevent deadlock?

1

Mutual exclusion

2

Hold and wait

3

Resource allocation graph with a cycle

4

Circular wait

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

Single-Thread Model

2

One-to-One Model

3

Many-to-One Model

4

Many-to-Many Model

Question 28

Which page replacement algorithm suffers from Belady's Anomaly?

1

Least Frequently Used (LFU)

2

LRU

3

Optimal Page Replacement

4

FIFO

Question 29

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

1

Handle asynchronous events

2

Optimize CPU scheduling

3

Execute user programs

4

Allocate memory

Question 30

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

1

To allocate memory

2

To execute system commands

3

To terminate a process

4

To create a new process