Operating Systems MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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Which of the following is a technique used for ‘load balancing’ in a distributed system?
A. Distributing tasks across multiple servers to ensure no single server is overwhelmed
B. Maximizing the use of virtual memory
C. Increasing the speed of the CPU
D. Reducing the number of processes running concurrently
Answer: Distributing tasks across multiple servers to ensure no single server is overwhelmed
Which of the following best describes ‘thrashing’?
A. A situation where excessive paging occurs, leading to reduced system performance
B. A method of process scheduling to maximize CPU utilization
C. A technique to reduce the number of context switches
D. An error condition in memory allocation
Answer: A situation where excessive paging occurs, leading to reduced system performance
Which scheduling algorithm is designed to minimize the average waiting time for processes?
A. Shortest Job First (SJF)
B. Round Robin
C. First-Come, First-Served (FCFS)
D. Priority Scheduling
Answer: Shortest Job First (SJF)
In the context of process synchronization, what does ‘mutual exclusion’ refer to?
A. A condition where only one process can access a critical section at a time
B. A method to ensure that processes are executed in a specific order
C. A way to increase the efficiency of process execution
D. A technique to minimize the CPU usage
Answer: A condition where only one process can access a critical section at a time
In a UNIX-like operating system, which command is used to display the status of all processes?
A. ps
B. top
C. df
D. ls
Answer: ps
What is the main difference between ‘paging’ and ‘segmentation’?
A. Paging divides memory into fixed-sized blocks, while segmentation divides it into variable-sized sections
B. Paging causes fragmentation, while segmentation does not
C. Segmentation is only used in multiprocessor systems
D. Paging requires more CPU overhead than segmentation
Answer: Paging divides memory into fixed-sized blocks, while segmentation divides it into variable-sized sections
Which of the following is true about ‘deadlock prevention’?
A. It ensures that deadlock will not occur by preventing one of the four necessary conditions for deadlock
B. It involves restarting the system if a deadlock occurs
C. It detects deadlock after it occurs and then resolves it
D. It allocates resources dynamically to avoid deadlock
Answer: It ensures that deadlock will not occur by preventing one of the four necessary conditions for deadlock
Which of the following is a characteristic of ‘multithreading’ in an operating system?
A. Multiple threads within the same process share memory and resources
B. Each thread has its own memory space
C. Threads cannot run concurrently
D. Threads are isolated from each other in terms of memory
Answer: Multiple threads within the same process share memory and resources
Which of the following is a key benefit of using virtual memory?
A. It allows for processes to be executed even if the system lacks enough physical memory
B. It prevents deadlock situations
C. It increases the speed of disk I/O
D. It reduces the number of context switches
Answer: It allows for processes to be executed even if the system lacks enough physical memory