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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) absolute address
B) logical address
C) none of the mentioned
D) physical address
  • 4. Run time mapping from virtual to physical address is done by
A) CPU
B) None of the mentioned
C) Memory management unit
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) none of the mentioned
D) fragmentation
  • 6. The address of a page table in memory is pointed by
A) stack pointer
B) page register
C) page table base register
D) program counter
  • 7. Program always deals with
A) relative address
B) absolute address
C) logical address
D) physical address
  • 8. The page table contains
A) base address of each page in physical memory
B) page offset
C) page size
D) none of the mentioned
  • 9. What is compaction?
A) a paging technique
B) a technique for overcoming fatal error
C) a technique for overcoming internal fragmentation
D) a technique for overcoming external fragmentation
  • 10. Operating System maintains the page table for
A) each instruction
B) each process
C) each address
D) each thread
  • 11. The address generated by the CPU is referred to as
A) Neither physical nor logical
B) None of the mentioned
C) Physical address
D) Logical address
  • 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) None of the mentioned
B) Memory management unit
C) Memory mapping unit
D) Virtual to physical mapper
  • 14. The base register is also known as the
A) delocation register
B) relocation register
C) relocation register
D) basic register
  • 15. The size of a process is limited to the size of
A) physical memory
B) secondary storage
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) must
B) may
C) has to be
D) can never
  • 17. Swapping requires a
A) monitor
B) backing store
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) all of the mentioned
D) disk to provide direct access to the memory images
  • 19. The ________ consists of all processes whose memory images are in the backing store or in memory and are ready to run.
A) ready queue
B) secondary storage
C) wait queue
D) cpu
  • 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) all of the mentioned
C) context – switch
D) execution
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