Operating System Questions Answers - Chapter 1 Online Quiz Test

• 1. Main function of shared memory is:

  1. to use primary memory efficently
  2. to do intra process communication
  3. to do inter process communication
  4. none of above

• 2. 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

• 3. 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

• 4. Disk scheduling includes deciding

  1. which should be accessed next
  2. order in which disk access requests must be serviced
  3. the physical location of the file
  4. the logical location of the file

• 5. Belady anamoly occurs in

  1. Optimal replacement
  2. FIFO
  3. LRU
  4. both in FIFO and LRU

• 6. 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

• 7. Memory protection is normally done by

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

• 8. Which among following scheduling algorithms give minimum average waiting time

  1. FCFS
  2. SJF
  3. Round robin
  4. On priority

• 9. 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

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

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

• 11. Size of virtual memory depends on

  1. size of data bus
  2. size of address bus
  3. size of main memory
  4. none of above

• 12. Semophores are used to solve the problem of

  1. race condition
  2. process synchronization
  3. mutual exclusion
  4. belady problem

• 13. For multiprogramming operating system

  1. special support from processor is essential
  2. special support from processor is not essential
  3. cache memory is essential
  4. none of above

• 14. In which scheduling policies, context switching never takes place

  1. FCFS
  2. round robin
  3. Shortest job first
  4. Pre-empitive

• 15. Which is single user operating system

  1. MS-DOS
  2. UNIX
  3. XENIX
  4. LINUX

• 16. 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

• 17. Which operating system reacts in the actual time

  1. Batch system
  2. Quick response system
  3. Real time system
  4. Time sharing system

• 18. Macintosh computer uses

  1. System 7.0
  2. AU/X
  3. Xenix
  4. none of above

• 19. Problem of thrashing is affected significantly by

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

• 20. 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