Operating system interview question

Question : What is the main function of an operating system?

Manage hardware resources

Run applications

Provide a user interface

All of the above

Correct Answer :All of the above

Question : Which of the following is not a main function of the operating system?

Process management

File management

Web browsing

Memory management

Correct Answer :Web browsing

Question : What is the purpose of a file system in an operating system?

Manage system processes

Organize and store data on storage devices

Control network traffic

Allocate CPU resources

Correct Answer :Organize and store data on storage devices

Question : Which scheduling algorithm provides the best average response time for a set of processes?

First-Come, First-Served (FCFS)

Shortest Job Next (SJN)

Round Robin (RR)

Priority Scheduling

Correct Answer :Shortest Job Next (SJN)

Question : What is a deadlock in the context of an operating system?

A process terminates unexpectedly

A process is waiting for a resource held by another process

Two or more processes are unable to proceed because each is waiting for the other

A process consumes excessive CPU time

Correct Answer :Two or more processes are unable to proceed because each is waiting for the other

Question : Which memory management scheme allows programs to be larger than the physical memory?

Paging

Segmentation

Virtual memory

Cache memory

Correct Answer :Virtual memory

Question : What is the role of the Kernel in an operating system?

Manage user interfaces

Provide security to the system

Act as an intermediary between hardware and software

Execute user applications

Correct Answer :Act as an intermediary between hardware and software

Question : In a multiprogramming environment, what is the primary purpose of the job scheduler?

Manage input/output devices

Allocate CPU to processes

Manage system resources

Execute system commands

Correct Answer :Allocate CPU to processes

Question : What is the purpose of the "swap space" in the context of virtual memory?

Store temporary files

Hold the operating system kernel

Provide additional RAM when physical memory is full

Manage file permissions

Correct Answer :Provide additional RAM when physical memory is full

Question : What is the function of an Interrupt Handler in an operating system?

Manage system calls

Handle errors in the file system

Respond to hardware or software-generated interrupts

Monitor network traffic

Correct Answer :Respond to hardware or software-generated interrupts

Question : What is the purpose of the 'page fault' in virtual memory systems?

A page is removed from the memory

A page is successfully fetched from the disk

A required page is not in memory and must be brought in

The page table is corrupted

Correct Answer :A required page is not in memory and must be brought in

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

Windows

Linux

Android

QNX

Correct Answer :QNX

Question : What is the purpose of the 'fork' system call in Unix-like operating systems?

Create a new process

Execute a new program

Terminate a process

Synchronize processes

Correct Answer :Create a new process

Question : Which of the following is an example of a preemptive scheduling algorithm?

First-Come, First-Served (FCFS)

Round Robin (RR)

Shortest Job Next (SJN)

Priority Scheduling

Correct Answer :Round Robin (RR)

Question : What is the role of the Secondary Storage in an operating system?

Store temporary data during program execution

Provide fast access to frequently used data

Store data permanently even when the power is off

Manage network connections

Correct Answer :Store data permanently even when the power is off

Question : Which memory management technique is used to overcome external fragmentation?

Paging

Segmentation

Swapping

Fragmentation cannot be overcome

Correct Answer :Paging

Question : What is the purpose of the 'shell' in an operating system?

Manage system resources

Provide a user interface

Handle hardware interrupts

Execute system calls

Correct Answer :Provide a user interface

Question : What is a process in the context of an operating system?

A program in execution

A file system structure

A system call

A hardware component

Correct Answer :A program in execution

Question : Which file system is commonly used in Linux operating systems?

NTFS

FAT32

ext4

HFS+

Correct Answer :ext4

Question : What is the purpose of the 'DMA Controller' in computer systems?

Manage disk space

Facilitate communication between the CPU and I/O devices

Handle memory allocation

Execute arithmetic operations

Correct Answer :Facilitate communication between the CPU and I/O devices

Question : What is the purpose of the 'chroot' command in Unix-like operating systems?

Change root directory for a process

Change system clock

Change user password

Change shell prompt

Correct Answer :Change root directory for a process

Question : Which scheduling algorithm uses a priority value associated with each process for CPU allocation?

First-Come, First-Served (FCFS)

Round Robin (RR)

Priority Scheduling

Shortest Job Next (SJN)

Correct Answer :Priority Scheduling

Question : In the context of memory management, what is thrashing?

Excessive page faults

Rapidly switching between processes

Fragmentation of memory

Allocation of too much swap space

Correct Answer :Excessive page faults

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

Windows

Linux

Android

VxWorks

Correct Answer :VxWorks

Question : What is the primary purpose of the 'fork' system call in Unix-like operating systems?

Terminate a process

Create a new process

Allocate memory to a process

Change process priority

Correct Answer :Create a new process

Question : Which file system is commonly used in Windows operating systems?

ext4

NTFS

HFS+

FAT32

Correct Answer :NTFS

Question : What is the purpose of the 'nice' command in Unix-like operating systems?

Adjust process priority

Display system information

Rename files

Create symbolic links

Correct Answer :Adjust process priority

Question : What is the role of the 'swap space' in the virtual memory system?

Store temporary files

Hold the operating system kernel

Provide additional RAM when physical memory is full

Manage file permissions

Correct Answer :Provide additional RAM when physical memory is full

Question : Which process scheduling algorithm allows a process to occupy the CPU until it completes execution?

Round Robin (RR)

Priority Scheduling

First-Come, First-Served (FCFS)

Shortest Job Next (SJN)

Correct Answer :First-Come, First-Served (FCFS)

Question : What is a 'Semaphore' in the context of operating systems?

A signaling mechanism for process synchronization

A type of memory allocation

A system clock component

A file system structure

Correct Answer :A signaling mechanism for process synchronization

Question : In the context of file systems, what does RAID stand for?

Random Access In-memory Disk

Redundant Array of Independent Disks

Rapid Access for Input Data

Read And Insert Data

Correct Answer :Redundant Array of Independent Disks

Question : Which process scheduling algorithm aims to reduce the waiting time for processes with higher priority?

Shortest Job Next (SJN)

Priority Scheduling

Round Robin (RR)

Multilevel Queue Scheduling

Correct Answer :Priority Scheduling

Question : What is the purpose of the 'lsblk' command in Linux?

List block devices

List system logs

List running processes

List file attributes

Correct Answer :List block devices

Question : Which scheduling algorithm uses multiple queues with different priorities for CPU allocation?

Round Robin (RR)

Priority Scheduling

Multilevel Queue Scheduling

Shortest Job Next (SJN)

Correct Answer :Multilevel Queue Scheduling

Question : What is the purpose of the 'mount' command in Linux?

Create a new directory

Display disk usage

Attach a filesystem to the directory tree

Change file permissions

Correct Answer :Attach a filesystem to the directory tree

Question : Which process scheduling algorithm employs time slices for each process?

Priority Scheduling

Shortest Job Next (SJN)

Round Robin (RR)

First-Come, First-Served (FCFS)

Correct Answer :Round Robin (RR)

Question : What is the function of the 'swapoff' command in Linux?

Enable swap space

Disable swap space

Display swap space information

Create a swap partition

Correct Answer :Disable swap space

Question : In the context of operating systems, what is a 'context switch'?

Changing the system configuration

Switching between different file systems

Switching between processes

Changing user passwords

Correct Answer :Switching between processes

Question : What is the purpose of the 'chown' command in Unix-like operating systems?

Change file ownership

Change file permissions

Change file content

Change file attributes

Correct Answer :Change file ownership

Question : Which component of the operating system manages the execution of processes?

Kernel

Shell

Scheduler

File System

Correct Answer :Scheduler