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Formative Test - 3
  • 1. CPU fetches the instruction from memory according to the value of
A) status register
B) program status word
C) program counter
D) instruction register
  • 2. A memory buffer used to accommodate a speed differential is called
A) accumulator
B) cache
C) disk buffer
D) stack pointer
  • 3. Which one of the following is the address generated by CPU?
A) none of the mentioned
B) absolute address
C) physical address
D) logical address
  • 4. Run time mapping from virtual to physical address is done by
A) CPU
B) PCI
C) Memory management unit
D) None of the mentioned
  • 5. Memory management technique in which system stores and retrieves data from secondary storage for use in main memory is called?
A) none of the mentioned
B) fragmentation
C) mapping
D) paging
  • 6. The address of a page table in memory is pointed by
A) page register
B) page table base register
C) program counter
D) stack pointer
  • 7. Program always deals with
A) relative address
B) absolute address
C) physical address
D) logical address
  • 8. The page table contains
A) page size
B) none of the mentioned
C) page offset
D) base address of each page in physical memory
  • 9. What is compaction?
A) a paging technique
B) a technique for overcoming internal fragmentation
C) a technique for overcoming fatal error
D) a technique for overcoming external fragmentation
  • 10. Operating System maintains the page table for
A) each process
B) each thread
C) each address
D) each instruction
  • 11. The address generated by the CPU is referred to as
A) Neither physical nor logical
B) Logical address
C) Physical address
D) None of the mentioned
  • 12. The address loaded into the memory address register of the memory is referred to as
A) None of the mentioned
B) Logical address
C) Physical address
D) Logical address
  • 13. The run time mapping from virtual to physical addresses is done by a hardware device called the
A) Virtual to physical mapper
B) Memory management unit
C) Memory mapping unit
D) None of the mentioned
  • 14. The base register is also known as the
A) relocation register
B) relocation register
C) delocation register
D) basic register
  • 15. The size of a process is limited to the size of
A) external storage
B) none of the mentioned
C) physical memory
D) secondary storage
  • 16. If execution time binding is being used, then a process ______ be swapped to a different memory space.
A) must
B) may
C) can never
D) has to be
  • 17. Swapping requires a
A) keyboard
B) backing store
C) motherboard
D) monitor
  • 18. The backing store is generally a
A) fast disk
B) disk large enough to accommodate copies of all memory images for all users
C) disk to provide direct access to the memory images
D) all of the mentioned
  • 19. The ________ consists of all processes whose memory images are in the backing store or in memory and are ready to run.
A) cpu
B) wait queue
C) secondary storage
D) ready queue
  • 20. The _________ time in a swap out of a running process and swap in of a new process into the memory is very high.
A) execution
B) context – switch
C) waiting
D) all of the mentioned
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