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