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MCQ Quiz - Class 8 - Operating System

Rumman Ansari July 13, 2026 9 views Subject Details

SELF-ASSESSMENT QUIZ

MCQ Quiz — Operating System

Test your knowledge with these 15 carefully designed Multiple Choice Questions covering all major Operating System topics — from basics and process management to memory, file systems, and security. Each question includes a detailed explanation to help you learn while you practice.

Instructions

How to Attempt

Choose the most appropriate answer for each question.
Each question has only one correct answer.
Do not check the answer key until you finish all 15 questions.
After completing the quiz, verify your answers at the bottom.
Read the explanations to strengthen your understanding.

Syllabus Covered

Topics Included

Basics of Operating System
Process Management
Memory Management
File System
I/O & Device Management
System Calls, Security & More

Quiz Details

Total Questions: 15
Level: Beginner to Intermediate
Type: Multiple Choice
Duration: Approx. 20 minutes
Marking: 1 mark per question
No negative marking

Good Luck! Attempt all questions before checking the answer key.

MCQ Questions

Q1. What is an Operating System?

A. System software that manages hardware and software resources
B. Application software
C. Programming language
D. Utility software

Answer: A An Operating System is system software that manages hardware and software resources of a computer and acts as an interface between users and the hardware.

Q2. Which of the following is the main function of an OS?

A. Playing games
B. Managing resources
C. Creating documents
D. Browsing the internet

Answer: B The main function of an OS is managing resources such as CPU, memory, storage, and I/O devices efficiently.

Q3. Which OS is an example of open-source operating system?

A. Windows
B. macOS
C. Linux
D. iOS

Answer: C Linux is an open-source operating system whose source code is freely available and can be modified by anyone.

Q4. What is a process?

A. A program in execution
B. A programming language
C. A system file
D. A type of memory

Answer: A A process is an active instance of a program that is currently being executed by the CPU.

Q5. Which of the following is NOT a process state?

A. Ready
B. Running
C. Waiting
D. Compiling

Answer: D Compiling is not a process state. The standard process states are New, Ready, Running, Waiting, and Terminated.

Q6. Which scheduling algorithm selects the process with the shortest burst time?

A. FCFS
B. SJF
C. Round Robin
D. Priority Scheduling

Answer: B Shortest Job First (SJF) selects the process with the shortest expected CPU burst time. It gives minimum average waiting time.

Q7. What is the full form of PCB?

A. Program Control Block
B. Process Control Block
C. Program Command Block
D. Process Code Block

Answer: B PCB stands for Process Control Block. It stores essential information about a process such as PID, state, program counter, registers, and I/O status.

Q8. What is paging in memory management?

A. Dividing memory into fixed-size pages
B. Dividing memory into segments
C. Deleting pages from memory
D. Linking memory blocks

Answer: A Paging divides memory into fixed-size blocks called pages (logical) and frames (physical), eliminating external fragmentation.

Q9. Which of the following is used to handle fragmentation?

A. Paging
B. Segmentation
C. Partitioning
D. Spooling

Answer: A Paging is used to handle fragmentation, particularly external fragmentation, by allowing memory to be allocated non-contiguously.

Q10. Which file system is used by Windows NT and later versions?

A. FAT32
B. NTFS
C. EXT4
D. APFS

Answer: B NTFS (New Technology File System) is used by Windows NT and all later versions of Windows for its reliability, security, and large file support.

Q11. What is a system call?

A. Call made by OS to an application
B. Call made by a user to the OS
C. Call made by hardware to OS
D. Call between two applications

Answer: B A system call is a mechanism through which a user program requests a service from the operating system kernel — for example, file operations, memory allocation, or process control.

Q12. Which of the following is an example of device driver?

A. MS Word
B. Printer driver
C. Chrome Browser
D. Python Interpreter

Answer: B A Printer driver is a device driver — a program that allows the OS to communicate with a specific hardware device such as a printer.

Q13. What is virtual memory?

A. Memory on hard disk used as extension of RAM
B. Cache memory
C. ROM memory
D. Register memory

Answer: A Virtual Memory is a memory management technique that uses a portion of the hard disk as an extension of RAM to run programs larger than physical memory.

Q14. Which of the following is used to prevent unauthorized access?

A. Scheduling
B. Authentication
C. Compiling
D. Spooling

Answer: B Authentication is the security mechanism used to verify user identity and prevent unauthorized access to the system.

Q15. What is deadlock?

A. A process running very fast
B. Multiple processes waiting for each other forever
C. System crash
D. Memory full condition

Answer: B Deadlock occurs when two or more processes are waiting for each other's resources indefinitely, causing all involved processes to be blocked forever.

Answer Key

Compare your answers with the answer key below and count your correct answers.

Q. No.	Answer	Q. No.	Answer	Q. No.	Answer
1	A	6	B	11	B
2	B	7	B	12	B
3	C	8	A	13	A
4	A	9	A	14	B
5	D	10	B	15	B

Score Yourself

Count your correct answers and check your performance level below.

Score Range	Performance	Feedback
13 – 15	🏆 Excellent!	Keep it up! You have a strong grasp of OS concepts.
9 – 12	👍 Good!	Good effort. Practice more to strengthen your basics.
0 – 8	📘 Needs Improvement	Revise the key OS concepts and retry the quiz.

Key Topics to Master

Must-Know Topics

Operating System Basics – Definition, Functions, Types
Process Management – Process states, PCB, Context Switching
CPU Scheduling – FCFS, SJF, Round Robin, Priority
Memory Management – Paging, Segmentation, Virtual Memory
File System – FAT, NTFS, EXT4, File Operations
I/O and Device Management – Drivers, Buffering, Spooling
System Calls & Interrupts – Types and Examples
Security and Protection – Authentication, Authorization, Access Control
Multitasking & Multiuser System – Preemptive vs Non-Preemptive
Deadlock – Conditions, Prevention, Detection

Tips to Score High

Preparation Strategy

Understand concepts — don't just memorize answers.
Practice with diagrams and real-life examples.
Revise key algorithms and definitions often.
Take regular quizzes and mock tests to build speed.
Stay calm and read each question carefully.
Eliminate wrong options to increase your chances.
Focus on frequently asked topics like paging, scheduling, and deadlock.
Solve previous year questions for practice.

Did You Know?

Interesting Fact

The first modern operating system, UNIX, was developed at Bell Labs in the 1970s by Ken Thompson and Dennis Ritchie. Today, UNIX principles still influence Linux, macOS, and many modern operating systems used worldwide.

Bonus Practice Questions

Try these additional questions to further test your OS knowledge.

Bonus Q1. Which of the following is NOT a function of an operating system?

A. Memory Management
B. Process Management
C. Compiling programs
D. Device Management

Answer: C Compiling programs is done by a compiler, not by the OS.

Bonus Q2. Which memory is fastest?

A. RAM
B. Cache
C. Hard Disk
D. ROM

Answer: B Cache memory is the fastest among all — placed close to the CPU for quick access.

Bonus Q3. Which scheduling algorithm can suffer from starvation?

A. FCFS
B. Round Robin
C. Priority Scheduling
D. SJF (non-preemptive)

Answer: C Priority Scheduling may cause starvation when low-priority processes wait indefinitely.

Bonus Q4. Which of the following is an example of Real-Time OS?

A. Windows 10
B. Linux
C. VxWorks
D. macOS

Answer: C VxWorks is a real-time operating system used in embedded and time-critical systems.

Bonus Q5. Which of the following is a symptom of thrashing?

A. High CPU utilization
B. Low CPU utilization with high paging activity
C. Fast execution of processes
D. No swap activity

Answer: B Thrashing is characterized by low CPU utilization with excessive paging activity — the system spends more time swapping than executing.

Final Takeaway

Congratulations on completing the MCQ Quiz — Operating System! Quizzes are a powerful way to test your understanding, identify weak areas, and reinforce concepts. Keep practicing regularly, revise key topics, and take more quizzes to sharpen your knowledge.

Master Operating System — Build Strong Concepts Today, Succeed Tomorrow! 🚀

SELF-ASSESSMENT QUIZ — SET 2

MCQ Quiz — Operating System (Set 2)

Continue testing your Operating System knowledge with this second set of 15 intermediate-level Multiple Choice Questions. This set focuses on threads, deadlocks, virtual memory, semaphores, TLB, page replacement, and system calls — with detailed explanations for every answer.

Instructions

How to Attempt

Choose the most appropriate answer for each question.
Each question has only one correct answer.
Do not check the answer key until you finish all 15 questions.
Use this quiz for self-assessment and revision.
Read the explanations carefully to strengthen your concepts.

Syllabus Covered

Topics Included

Process Management & Threading
CPU Scheduling
Deadlocks (Concepts & Handling)
Memory Management
Virtual Memory & Paging
File Systems & File Access
I/O Management & DMA
System Calls & OS Services
Security & Protection

Quiz Details

Total Questions: 15
Level: Beginner to Intermediate
Type: Multiple Choice
Duration: Approx. 25 minutes
Marking: 1 mark per question
No negative marking

All the Best! Attempt all questions before checking the answer key at the bottom.

MCQ Questions

Q1. Which of the following is a system call in Linux?

A. printf()
B. fork()
C. scanf()
D. strcpy()

Answer: B fork() is a Linux system call used to create a new process. The other options are C library functions, not system calls.

Q2. Which of the following is true about threads?

A. Threads share code and data
B. Each thread has its own code
C. Threads are heavy-weight
D. Threads cannot run concurrently

Answer: A Threads within the same process share code, data, and OS resources but have their own stack and registers. Threads are light-weight and can run concurrently.

Q3. Which CPU scheduling algorithm is best for time-sharing systems?

A. FCFS
B. Priority Scheduling
C. Round Robin
D. SJF

Answer: C Round Robin is best for time-sharing systems because it allocates a fixed time slice (quantum) to each process in a circular order, ensuring fair CPU distribution.

Q4. What is the purpose of context switching?

A. To switch between user and kernel mode
B. To switch CPU from one process to another
C. To switch memory from RAM to disk
D. To switch between devices

Answer: B Context Switching is the process of saving the state of the currently running process and loading the state of the next process, enabling the CPU to switch between processes.

Q5. Which of the following can cause deadlock?

A. Mutual Exclusion
B. Hold and Wait
C. Circular Wait
D. All of the above

Answer: D All four conditions — Mutual Exclusion, Hold and Wait, No Preemption, and Circular Wait — must occur simultaneously for a deadlock to happen (Coffman's conditions).

Q6. Which method is used to prevent deadlock?

A. Ignoring the problem
B. Deadlock detection
C. Deadlock prevention
D. All of the above

Answer: C Deadlock Prevention is the strategy that eliminates one of the four necessary conditions to ensure deadlocks never occur. Detection and ignoring are handling strategies, not prevention.

Q7. What is a semaphore used for?

A. Memory allocation
B. Process synchronization
C. File storage
D. User authentication

Answer: B A Semaphore is a synchronization tool used to control access to shared resources by multiple processes. It prevents race conditions and ensures proper coordination.

Q8. Which page replacement algorithm is least recently used?

A. FIFO
B. LRU
C. Optimal
D. Random

Answer: B LRU (Least Recently Used) is the page replacement algorithm that replaces the page which has not been used for the longest period of time.

Q9. What does TLB stand for?

A. Translation Look Buffer
B. Translation Lookaside Buffer
C. Table Lookup Block
D. Temporary Load Buffer

Answer: B TLB stands for Translation Lookaside Buffer. It is a cache used in the memory management unit (MMU) to speed up virtual to physical address translation.

Q10. Which of the following is NOT a file access method?

A. Sequential access
B. Direct access
C. Indexed access
D. Random access

Answer: D Random access is not a standard file access method. The standard file access methods are Sequential, Direct, and Indexed. (Note: "Direct access" is sometimes called "Random access" in general computing, but in OS terminology, the standard three are the recognized types.)

Q11. In which file system is journaling commonly used?

A. FAT32
B. NTFS
C. EXT4
D. exFAT

Answer: C EXT4 (Fourth Extended File System) is widely used in Linux and features journaling to maintain file system integrity in case of crashes or power failures.

Q12. Which I/O technique allows a device to transfer data directly to memory?

A. Buffering
B. Spooling
C. DMA
D. Caching

Answer: C DMA (Direct Memory Access) allows hardware devices to transfer data directly to/from memory without CPU intervention, improving performance and freeing CPU cycles.

Q13. Which of the following is an example of a kernel-level thread?

A. User-level thread
B. Green thread
C. Solaris thread
D. POSIX thread

Answer: C Solaris threads are managed directly by the kernel and are examples of kernel-level threads. User-level threads and green threads are managed in user space, while POSIX threads (pthreads) can be either depending on implementation.

Q14. What is the main advantage of virtual memory?

A. Increases CPU speed
B. Provides more user memory than physical memory
C. Improves hard disk capacity
D. Increases cache memory

Answer: B Virtual Memory gives the illusion of having more memory than physically available by using disk space as an extension of RAM, allowing larger programs to run.

Q15. Which OS feature ensures that one process cannot access another process's memory?

A. Memory protection
B. Time sharing
C. File allocation
D. Process scheduling

Answer: A Memory Protection is the OS feature that ensures each process has its own isolated memory space and cannot access memory belonging to another process, maintaining security and stability.

Answer Key

Compare your answers with the answer key below.

Q. No.	Answer	Q. No.	Answer	Q. No.	Answer
1	B	6	C	11	C
2	A	7	B	12	C
3	C	8	B	13	C
4	B	9	B	14	B
5	D	10	D	15	A

Score Yourself

Score Range	Performance	Feedback
13 – 15	🏆 Excellent!	You have strong concepts. Keep it up!
9 – 12	👍 Good!	Review weak topics and practice more.
0 – 8	📘 Needs Improvement	Go through the basics and try again.

Key Topics to Master

Must-Know Topics

Process & Thread Management
CPU Scheduling Algorithms
Deadlock — Concepts & Handling
Memory Management (Paging, Segmentation)
Virtual Memory & Page Replacement
File Systems & File Access Methods
I/O Management & DMA
System Calls & OS Services
Security & Protection
Synchronization (Semaphores, Mutexes)

Tips to Score High

Preparation Strategy

Understand concepts — don't memorize blindly.
Practice MCQs and previous year questions.
Draw diagrams to explain complex topics.
Revise regularly and take short notes.
Stay calm and manage time during the exam.
Learn the four Coffman conditions for deadlock.
Master page replacement algorithms (FIFO, LRU, Optimal).
Understand differences between user-level and kernel-level threads.

Did You Know?

Interesting Fact

The UNIX operating system, developed in the 1970s, is the foundation for many modern operating systems including Linux, macOS, Android, and iOS. Its design principles continue to influence operating system development even today.

Bonus Practice Questions

Bonus Q1. Which of the following is NOT a Coffman condition for deadlock?

A. Mutual Exclusion
B. Hold and Wait
C. Preemption
D. Circular Wait

Answer: C No Preemption is a Coffman condition — not preemption itself.

Bonus Q2. Which is faster: kernel-level threads or user-level threads?

A. Kernel-level threads
B. User-level threads
C. Both are equally fast
D. Depends on the OS

Answer: B User-level threads are faster to create and switch because they don't require kernel mode transitions.

Bonus Q3. Which of the following is used to solve the producer-consumer problem?

A. Semaphores
B. Deadlock
C. Paging
D. Compilation

Answer: A Semaphores are commonly used to synchronize the producer-consumer problem.

Bonus Q4. Belady's Anomaly is associated with which algorithm?

A. FIFO
B. LRU
C. Optimal
D. Round Robin

Answer: A Belady's Anomaly occurs in FIFO page replacement, where increasing frames can increase page faults.

Bonus Q5. Which of the following is a synchronization primitive?

A. Mutex
B. Compiler
C. Loader
D. Linker

Answer: A Mutex (Mutual Exclusion) is a synchronization primitive used to protect shared resources.

Final Takeaway

Well done on completing MCQ Quiz — Operating System (Set 2)! This set covered advanced concepts like threads, deadlocks, virtual memory, page replacement, TLB, DMA, and semaphores. Regular practice with quizzes builds speed, accuracy, and confidence for exams and interviews.

Master Operating System — Build Strong Concepts Today, Succeed Tomorrow! 🚀

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