Operating System MCQs with Answers
Practice important Operating System MCQs with answers and explanations.
Chapter: 2
Q61:
When an interrupt occurs, the CPU ________ the execution of the current task.
A. Terminates
B. Pauses
C. Switches to another task
D. Resumes immediately
Correct Answer:
C
Chapter: 2
Q62:
A ________ system may require swapping jobs in and out of memory to ensure timely response.
A. Multi-programmed
B. Real-time
C. Time-sharing
D. Batch
Correct Answer:
C
Chapter: 2
Q63:
The main objective of real-time systems is to meet strict ________ constraints.
A. Time
B. I/O
C. Data
D. Memory
Correct Answer:
A
Chapter: 2
Q64:
In a real-time system, the consequences of missing a deadline may lead to ________.
A. Process failure
B. Data loss
C. System crash
D. Task termination
Correct Answer:
A
Chapter: 2
Q65:
The main advantage of time-sharing systems is that they provide ________ response times for users.
A. Faster
B. Slower
C. Fixed
D. No
Correct Answer:
A
Chapter: 2
Q66:
________ systems allow multiple users to interact with a computer at the same time.
A. Time-sharing
B. Batch
C. Multi-programmed
D. Real-time
Correct Answer:
A
Chapter: 3
Q67:
The region in memory that a process is allowed to access is known as process __________.
A. address space
B. heap area
C. stack space
D. data section
Correct Answer:
A
Chapter: 3
Q68:
What does the base register hold in memory protection?
A. Smallest legal memory address
B. Maximum memory address
C. Process size
D. Starting address of OS
Correct Answer:
A
Chapter: 3
Q69:
What is the main function of the limit register in memory protection?
A. To hold the process’s maximum memory size
B. To define the process’s address space
C. To store the process’s starting address
D. To hold the memory address of the interrupt table
Correct Answer:
B
Chapter: 3
Q70:
Which of the following is used to ensure a process does not access memory outside its address space?
A. Timer interrupt
B. Limit register
C. Interrupt vector table
D. Memory fragmentation
Correct Answer:
B
Chapter: 3
Q71:
In CPU protection, a timer interrupt is used to:
A. Prevent I/O operations
B. Ensure OS control over the CPU
C. Enable hardware interrupts
D. Track memory usage
Correct Answer:
B
Chapter: 3
Q72:
Which of the following is responsible for keeping track of free memory space?
A. Main memory management
B. Secondary storage management
C. I/O system management
D. Protection system
Correct Answer:
A
Chapter: 3
Q73:
The operating system uses a __________ to track which parts of memory are being used and by which processes.
A. memory management unit
B. free-space manager
C. secondary storage tracker
D. page table
Correct Answer:
B
Chapter: 3
Q74:
Which operating system component is responsible for creating and terminating processes?
A. Process management
B. File management
C. Memory management
D. Device management
Correct Answer:
A
Chapter: 3
Q75:
Main memory is primarily used for storing __________.
A. Programs and data currently being executed
B. Archived files
C. Operating system backups
D. Network configurations
Correct Answer:
A
Chapter: 3
Q76:
Which of the following tasks is part of disk management in an operating system?
A. Memory allocation
B. Free-space management
C. Buffering
D. Interrupt handling
Correct Answer:
B
Chapter: 3
Q77:
The I/O subsystem includes all the following components EXCEPT:
A. Buffering and caching
B. Device-driver interface
C. Interrupt vector table
D. Spooling
Correct Answer:
C
Chapter: 3
Q78:
What is the function of the file management component in an OS?
A. Allocating CPU time to processes
B. Mapping files onto secondary storage
C. Handling network protocols
D. Managing memory allocation
Correct Answer:
B
Chapter: 3
Q79:
A computer system with multiple users must ensure proper __________ of resources.
A. protection
B. management
C. synchronization
D. access control
Correct Answer:
A
Chapter: 3
Q80:
Which of the following OS services allows programs to communicate with each other across different systems?
A. Error detection
B. Program execution
C. Communications
D. File system manipulation
Correct Answer:
C