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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) stack pointer
B) accumulator
C) cache
D) disk buffer
  • 3. Which one of the following is the address generated by CPU?
A) logical address
B) absolute address
C) none of the mentioned
D) physical address
  • 4. Run time mapping from virtual to physical address is done by
A) PCI
B) None of the mentioned
C) CPU
D) Memory management unit
  • 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) paging
D) mapping
  • 6. The address of a page table in memory is pointed by
A) page register
B) stack pointer
C) program counter
D) page table base register
  • 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) page offset
C) base address of each page in physical memory
D) none of the mentioned
  • 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 address
B) each thread
C) each instruction
D) each process
  • 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) 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) Memory management unit
B) None of the mentioned
C) Virtual to physical mapper
D) Memory mapping unit
  • 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) none of the mentioned
B) physical memory
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) 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 large enough to accommodate copies of all memory images for all users
B) fast disk
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) 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) all of the mentioned
B) waiting
C) execution
D) context – switch
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