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Root directory of a disk should be placed

  • at the fixed address in the main memory
  • at a fixed location on the disk
  • at the fixed location on system disk
  • anywhere on the disk

Answer: Option B

Similar Questions :

1. Reference bit is used for

  • Implementing LRU page replacement algorithm
  • Implementing NRU algorithm
  • To check the page table entry in the cache memory
  • none of above

Answer: Option B

2. Four necessary conditions for deadlock are non pre-emption, circular wait, hold and wait and

  • mutual exclusion
  • race condition
  • buffer overflow
  • None of above

Answer: Option A

3. Dirty bit is used to show

  • Page with corrupted data
  • Wrong page in memory
  • Page that is modified after being loaded in the cache memory
  • page that is less frequently accessed

Answer: Option C

4. Semaphores function is to

  • synchronize critical resources to prevent deadlock
  • synchronize processes for better CPU utilization
  • used for memory management
  • none of above

Answer: Option A

5. The LRU algorithm

  • pages out pages that have been used recently
  • pages out pages that have not been used recently
  • pages out pages that have been least used recently
  • pages out the first page in a given area

Answer: Option C

Read more from - Operating System Questions Answers - Chapter 1
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