Operating System Questions Answers - Chapter 1

• 36. Which technique is used by operating systems to execute several programs concurrently by switching back and forth

  1. Partitioning
  2. Multitasking
  3. Windowing
  4. Paging

  Answer :

  Option C

• 37. Dirty bit is used to show

  1. Page with corrupted data
  2. Wrong page in memory
  3. Page that is modified after being loaded in the cache memory
  4. page that is less frequently accessed

  Answer :

  Option C

• 38. Which one is true

  1. The linkage editor is used to edit programs which have to later link together
  2. The linkage editor links object module during compiling
  3. The linkage editor links objects modules and resolves external references between them before loading
  4. none of above

  Answer :

  Option C

• 39. Which scheduling policy is best suited for time-sharing operating systems

  1. Shortest job first
  2. Round robin
  3. First come first serve
  4. Elevator

  Answer :

  Option B

• 40. Which of the following does not interrupt an running process

  1. A device
  2. Timer
  3. Schedular Process
  4. Power failure

  Answer :

  Option C

• 41. Dynamic allocation of storage areas with VSAM files is accomplished by

  1. hashing
  2. control splits
  3. over flow areas
  4. relative recording

  Answer :

  Option B

• 42. If the property of locality of reference is well pronounced in a program

  1. the number of page faults will be more
  2. the number of page faults will be less
  3. the number of page faults will same
  4. none of above

  Answer :

  Option B