Operating Systems MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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In the context of deadlocks, which of the following best defines ‘Hold and Wait’?
A. A process holds a resource while waiting for other resources
B. A process waiting for I/O to complete
C. Processes wait in a queue for resources to be released
D. All processes are in a waiting state
Answer: A process holds a resource while waiting for other resources
What does the ‘critical section problem’ refer to?
A. The problem of ensuring no two processes are in their critical section at the same time
B. The issue of managing CPU allocation
C. Handling I/O bound processes
D. Managing memory usage
Answer: The problem of ensuring no two processes are in their critical section at the same time
Which of the following is the best description of ‘deadlock avoidance’?
A. A method that ensures no circular wait condition can exist
B. Killing processes to resolve deadlock
C. Allowing multiple processes to acquire the same resource
D. Requiring processes to release their resources in a specific order
Answer: A method that ensures no circular wait condition can exist
What is the ‘thrashing’ phenomenon in memory management?
A. Excessive swapping of pages in and out of memory
B. A process stuck in an infinite loop
C. The system running out of memory
D. Data corruption in memory
Answer: Excessive swapping of pages in and out of memory
What is the key difference between ‘microkernel’ and ‘monolithic kernel’?
A. Microkernel runs the minimal set of services in kernel mode while monolithic kernel runs all services in kernel mode
B. Microkernel does not support inter-process communication
C. Monolithic kernel uses less memory than microkernel
D. Microkernel is not suitable for real-time systems
Answer: Microkernel runs the minimal set of services in kernel mode while monolithic kernel runs all services in kernel mode
Which type of memory does not lose its contents when power is turned off?
A. Non-volatile memory
B. Volatile memory
C. Cache memory
D. Dynamic memory
Answer: Non-volatile memory
Which of the following is true about the ‘Monolithic Kernel’ architecture?
A. All operating system services run in kernel space
B. OS services are isolated in modules
C. Each service runs in its own process
D. OS services communicate via message passing
Answer: All operating system services run in kernel space
Which of the following best describes a ‘bootloader’?
A. A program that loads the operating system into memory
B. A process that runs in the background
C. A driver for peripheral devices
D. A method of organizing data on the disk
Answer: A program that loads the operating system into memory
Which type of interrupt is generated by the software itself?
A. Software interrupt
B. Hardware interrupt
C. External interrupt
D. I/O interrupt
Answer: Software interrupt