Operating Systems Concepts problems
- 1. Which, of the following checks, cannot be carried out on the input data to a system?
Options- A. consistency check
- B. Syntax check
- C. Range check
- D. All of the above
- E. None of the above Discuss
Correct Answer: Syntax check
- 2. Semaphores
Options- A. synchronize critical resources to prevent deadlock
- B. synchronize critical resources to prevent contention
- C. are used to do I/O
- D. are used for memory management
- E. None of the above Discuss
Correct Answer: synchronize critical resources to prevent deadlock
- 3. The technique, for sharing the time of a computer among several jobs. Which switches jobs so rapidly such that each job appears to have the computer to itself:
Options- A. time sharing
- B. time out
- C. time domain
- D. FIFO
- E. None of the above Discuss
Correct Answer: time sharing
- 4. A public key encryption system
Options- A. allows anyone to decode the transmission
- B. allows only the correct sender to decode the data
- C. allows only the correct receiver to decode the data
- D. does not encode the data before transmitting it
- E. None of the above Discuss
Correct Answer: allows only the correct receiver to decode the data
- 5. Which of the following is characteristic of an operating system?
Options- A. resource management
- B. error recovery
- C. memory management
- D. All the above
- E. None of the above Discuss
Correct Answer: All the above
- 6. What is the initial value of the semaphore to allow only one of the many processes to enter their critical section?
Options- A. 8
- B. 1
- C. 16
- D. 0
- E. None of the above Discuss
Correct Answer: 1
- 7. In which of the storage placement strategies a program is placed in the largest available hole in the main memory?
Options- A. best fit
- B. first fit
- C. worst fit
- D. buddy
- E. None of the above Discuss
Correct Answer: worst fit
- 8. Page-map table is
Options- A. A data file
- B. A directory
- C. Used for address translation
- D. All of the above
- E. None of the above Discuss
Correct Answer: Used for address translation
- 9. What scheduling algorithm allows processes that are logical runnable to be temporarily suspended?
Options- A. preemptive scheduling
- B. non-preemptive scheduling
- C. FIFO
- D. FCFS
- E. None of the above Discuss
Correct Answer: preemptive scheduling
- 10. Paging
Options- A. is a method of memory allocation by which the program is subdivided into equal portions, or pages and core is subdivided into equal portions or blocks.
- B. consists of those addresses that may be generated by a processor during execution of a computation.
- C. is a method of allocating processor time.
- D. allows multiple programs to reside in separate areas of core at the time.
- E. None of the above Discuss
Correct Answer: is a method of memory allocation by which the program is subdivided into equal portions, or pages and core is subdivided into equal portions or blocks.
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