Operating System MCQ

Operating System MCQ Questions are essential for anyone looking to deepen their understanding of core OS concepts. These multiple-choice questions cover key topics such as process management, memory management, file systems, concurrency, and security. Whether you are preparing for exams, technical interviews, or simply seeking to reinforce your knowledge, these MCQs will help you master the principles of operating systems. Perfect for students and professionals alike, these questions will enhance your problem-solving skills and provide a comprehensive understanding of OS functionality.

Q1. Which of the following is an example of an operating system?

Correct Answer: B

Windows is an operating system; others are applications.

Q2. Which operating system is open source?

Correct Answer: B

Linux is an open-source OS.

Q3. The kernel of an OS is responsible for:

Correct Answer: B

Kernel handles process management, memory, and resources.

Q4. Which scheduling algorithm gives priority to the process that arrives first?

Correct Answer: C

FCFS executes processes in arrival order.

Q5. Which scheduling algorithm uses time quantum?

Correct Answer: A

Round Robin allocates CPU in fixed time slices.

Q6. What is the main function of device drivers?

Correct Answer: C

Device drivers act as a bridge between OS and hardware.

Q7. In OS, thrashing is related to:

Correct Answer: B

Thrashing happens when excessive paging reduces performance.

Q8. Which of the following is NOT an OS?

Correct Answer: C

C++ is a programming language, not an OS.

Q9. Which memory is non-volatile and stores the OS permanently?

Correct Answer: B

ROM stores firmware and essential OS parts.

Q10. What does multitasking mean in operating systems?

Correct Answer: B

Multitasking allows multiple processes to run concurrently.

Q11. Which operating system is mainly used in mobile devices?

Correct Answer: C

Android is widely used in mobile devices.

Q12. Which type of OS is used in real-time applications?

Correct Answer: C

Real-time OS is designed for time-critical applications.

Q13. Which command is used in Linux to list files?

Correct Answer: A

ls lists files in Linux/Unix systems.

Q14. Which part of the OS manages file storage and retrieval?

Correct Answer: B

The file system manages file organization and retrieval.

Q15. Which system call creates a new process in Unix/Linux?

Correct Answer: A

fork() system call is used to create a new process.

Q16. What is a deadlock in OS?

Correct Answer: A

Deadlock occurs when processes wait indefinitely for resources.

Q17. Which memory management technique divides memory into fixed-size blocks?

Correct Answer: A

Paging divides memory into fixed-size blocks called pages.

Q18. Which file system is commonly used in Windows?

Correct Answer: B

NTFS is the standard file system for Windows.

Q19. Which OS feature allows multiple users to use the same computer at the same time?

Correct Answer: C

Multiuser OS supports multiple users at once.

Q20. Which of these is a Linux distribution?

Correct Answer: A

Ubuntu is a Linux distribution.

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