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