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Formative Test - 3
  • 1. CPU fetches the instruction from memory according to the value of
A) instruction register
B) program status word
C) status register
D) program counter
  • 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) logical address
B) physical address
C) absolute address
D) none of the mentioned
  • 4. Run time mapping from virtual to physical address is done by
A) CPU
B) Memory management unit
C) None of the mentioned
D) PCI
  • 5. Memory management technique in which system stores and retrieves data from secondary storage for use in main memory is called?
A) paging
B) mapping
C) fragmentation
D) none of the mentioned
  • 6. The address of a page table in memory is pointed by
A) program counter
B) stack pointer
C) page register
D) page table base register
  • 7. Program always deals with
A) relative address
B) logical address
C) absolute address
D) physical address
  • 8. The page table contains
A) page offset
B) base address of each page in physical memory
C) none of the mentioned
D) page size
  • 9. What is compaction?
A) a technique for overcoming external fragmentation
B) a paging technique
C) a technique for overcoming fatal error
D) a technique for overcoming internal fragmentation
  • 10. Operating System maintains the page table for
A) each address
B) each thread
C) each process
D) each instruction
  • 11. The address generated by the CPU is referred to as
A) Physical address
B) Logical address
C) Neither physical nor logical
D) None of the mentioned
  • 12. The address loaded into the memory address register of the memory is referred to as
A) Physical address
B) Logical address
C) None of the mentioned
D) Logical address
  • 13. The run time mapping from virtual to physical addresses is done by a hardware device called the
A) Memory mapping unit
B) None of the mentioned
C) Virtual to physical mapper
D) Memory management unit
  • 14. The base register is also known as the
A) relocation register
B) relocation register
C) basic register
D) delocation register
  • 15. The size of a process is limited to the size of
A) external storage
B) none of the mentioned
C) secondary storage
D) physical memory
  • 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) may
D) can never
  • 17. Swapping requires a
A) backing store
B) motherboard
C) keyboard
D) monitor
  • 18. The backing store is generally a
A) all of the mentioned
B) fast disk
C) disk to provide direct access to the memory images
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) wait queue
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) all of the mentioned
C) waiting
D) context – switch
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