Operating System MCQs with Answers
Practice important Operating System MCQs with answers and explanations.
Multiple Choice Questions
Q51: The mode bit in a CPU helps distinguish between ________ and user mode.
- A: Monitor
- B: Supervisor
- C: User
- D: None of the above
View Answer
A
Q52: In dual-mode operation, a user process can issue ________ instructions only through the operating system.
- A: Privileged
- B: Non-privileged
- C: System call
- D: I/O
View Answer
A
Q53: I/O protection ensures that user programs cannot issue ________ instructions directly.
- A: Privileged
- B: Non-privileged
- C: System calls
- D: Interrupts
View Answer
A
Q54: The purpose of memory protection is to ensure that one process cannot ________ the memory of another process.
- A: Access
- B: Modify
- C: Copy
- D: Both A and B
View Answer
D
Q55: Batch systems are most suitable for ________ operations.
- A: Interactive
- B: Automated
- C: Parallel
- D: Networked
View Answer
B
Q56: The key feature of time-sharing systems is ________.
- A: Multi-user interaction
- B: Single-user control
- C: Hardware protection
- D: Task prioritization
View Answer
A
Q57: ________ systems are used to control critical applications like medical imaging and industrial control.
- A: Real-time
- B: Multi-user
- C: Time-sharing
- D: Batch
View Answer
A
Q58: The primary goal of multi-programming is to maximize ________.
- A: CPU utilization
- B: I/O processing
- C: User interaction
- D: Task completion
View Answer
A
Q59: Which of the following systems uses a CPU burst to switch between jobs?
- A: Batch systems
- B: Multi-programmed systems
- C: Time-sharing systems
- D: Real-time systems
View Answer
B
Q60: When the system needs to execute privileged instructions, the mode bit switches to ________.
- A: Monitor mode
- B: User mode
- C: System mode
- D: Kernel mode
View Answer
A