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Formative Test - 3
  • 1. CPU fetches the instruction from memory according to the value of
A) instruction register
B) status register
C) program counter
D) program status word
  • 2. A memory buffer used to accommodate a speed differential is called
A) disk buffer
B) stack pointer
C) accumulator
D) cache
  • 3. Which one of the following is the address generated by CPU?
A) none of the mentioned
B) logical address
C) physical address
D) absolute address
  • 4. Run time mapping from virtual to physical address is done by
A) CPU
B) Memory management unit
C) PCI
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) fragmentation
B) paging
C) none of the mentioned
D) mapping
  • 6. The address of a page table in memory is pointed by
A) program counter
B) page table base register
C) stack pointer
D) page register
  • 7. Program always deals with
A) logical address
B) absolute address
C) relative address
D) physical 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 external fragmentation
B) a technique for overcoming fatal error
C) a paging technique
D) a technique for overcoming internal fragmentation
  • 10. Operating System maintains the page table for
A) each instruction
B) each thread
C) each process
D) each address
  • 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) Logical address
B) Physical address
C) Logical address
D) None of the mentioned
  • 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) basic register
B) relocation register
C) relocation register
D) delocation register
  • 15. The size of a process is limited to the size of
A) none of the mentioned
B) physical memory
C) secondary storage
D) external storage
  • 16. If execution time binding is being used, then a process ______ be swapped to a different memory space.
A) must
B) can never
C) has to be
D) may
  • 17. Swapping requires a
A) monitor
B) backing store
C) motherboard
D) keyboard
  • 18. The backing store is generally a
A) all of the mentioned
B) disk to provide direct access to the memory images
C) disk large enough to accommodate copies of all memory images for all users
D) fast disk
  • 19. The ________ consists of all processes whose memory images are in the backing store or in memory and are ready to run.
A) wait queue
B) cpu
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) all of the mentioned
B) context – switch
C) execution
D) waiting
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