AP ECET COMPUTER SCIENCE AND ENGINEERING Multiple Choice Questions (MCQs)
Multiple Choice Questions - Operating Systems
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Which of the following is the primary function of an operating system?
- a) Memory management
- b) Process management
- c) File management
- d) All of the above
Answer: d) All of the above
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Which of the following is an example of a process?
- a) A running program
- b) A stored file
- c) A program that has not started execution
- d) None of the above
Answer: a) A running program
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In which state does a process reside after it has been executed for a while and is waiting for an event to occur?
- a) New
- b) Ready
- c) Blocked
- d) Terminated
Answer: c) Blocked
-
Which of the following is the primary goal of process synchronization?
- a) To avoid deadlocks
- b) To ensure efficient CPU utilization
- c) To ensure that processes do not interfere with each other
- d) To prioritize the execution of processes
Answer: c) To ensure that processes do not interfere with each other
-
Which synchronization mechanism is used to prevent multiple processes from accessing a critical section simultaneously?
- a) Semaphore
- b) Mutex
- c) Monitor
- d) All of the above
Answer: d) All of the above
-
What is a deadlock in an operating system?
- a) When two or more processes are waiting indefinitely for each other to release resources
- b) When the system terminates a process to avoid conflict
- c) When a process becomes unresponsive due to resource overload
- d) None of the above
Answer: a) When two or more processes are waiting indefinitely for each other to release resources
-
Which of the following is NOT a condition for a deadlock to occur?
- a) Mutual exclusion
- b) Hold and wait
- c) No preemption
- d) Process starvation
Answer: d) Process starvation
-
Which of the following disk scheduling algorithms gives the shortest seek time?
- a) First-Come, First-Served (FCFS)
- b) Shortest Seek Time First (SSTF)
- c) SCAN
- d) Circular SCAN
Answer: b) Shortest Seek Time First (SSTF)
-
In which of the following memory management schemes, the physical memory is divided into fixed-size partitions?
- a) Paging
- b) Segmentation
- c) Fixed Partitioning
- d) Dynamic Partitioning
Answer: c) Fixed Partitioning
-
Which of the following is a disadvantage of paging?
- a) Internal fragmentation
- b) External fragmentation
- c) Increased CPU time
- d) None of the above
Answer: a) Internal fragmentation
-
Which of the following algorithms is used for disk space allocation in file systems?
- a) First-Come, First-Served (FCFS)
- b) Best Fit
- c) Contiguous Allocation
- d) All of the above
Answer: c) Contiguous Allocation
-
Which of the following describes a "long-term scheduler" in an operating system?
- a) It decides which process to admit into the ready queue
- b) It allocates CPU time to processes in the ready queue
- c) It handles deadlock detection and recovery
- d) It manages memory allocation to processes
Answer: a) It decides which process to admit into the ready queue
-
Which of the following is the main purpose of memory management in an operating system?
- a) To keep track of the status of each process
- b) To allocate and deallocate memory space to processes
- c) To manage file storage on disk
- d) To manage input and output devices
Answer: b) To allocate and deallocate memory space to processes
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In which type of file allocation method is a file's blocks stored in contiguous memory locations?
- a) Linked allocation
- b) Contiguous allocation
- c) Indexed allocation
- d) None of the above
Answer: b) Contiguous allocation
-
Which of the following strategies can be used to handle deadlock prevention?
- a) Resource allocation graph
- b) Circular wait prevention
- c) Both a and b
- d) None of the above
Answer: c) Both a and b
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