Operating System Questions Answers - Chapter 1

• 8. Memory protection is normally done by

  1. the processor and the associated hardware
  2. the operating system
  3. the compiler
  4. the user program

  Answer :

  Option A

• 9. Dijkstra's algorithm deals with

  1. mutual exclusion
  2. deadlock recovery
  3. deadlock avoidance
  4. cache coherence

  Answer :

  Option C

• 10. In real time OS, which is most suitable scheduling scheme

  1. round robin
  2. FCFS
  3. pre-emptive scheduling
  4. random scheduling

  Answer :

  Option C

• 11. Multiprogramming systems

  1. Are easier to develop than single programming systems
  2. Execute each job faster
  3. Execute more jobs in the same time
  4. Are used only on large main frame computers

  Answer :

  Option C

• 12. Problem of thrashing is affected significantly by

  1. program structure
  2. program size
  3. primary storage size
  4. all of above

  Answer :

  Option A

• 13. Reference bit is used for

  1. Implementing LRU page replacement algorithm
  2. Implementing NRU algorithm
  3. To check the page table entry in the cache memory
  4. none of above
  5. 68
  6. 74
  7. 78
  8. 80

  Answer :

  Option

• 14. A hardware device which is capable of executing a sequence of instructions, is known as

  1. CPU
  2. ALU
  3. CU
  4. Processor
  5. Rs 22650
  6. Rs 22750
  7. Rs 22850
  8. Rs 22950

  Answer :

  Option