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Formative Test - 3
  • 1. CPU fetches the instruction from memory according to the value of
A) status register
B) program counter
C) instruction register
D) program status word
  • 2. A memory buffer used to accommodate a speed differential is called
A) cache
B) stack pointer
C) accumulator
D) disk buffer
  • 3. Which one of the following is the address generated by CPU?
A) none of the mentioned
B) physical address
C) logical address
D) absolute address
  • 4. Run time mapping from virtual to physical address is done by
A) Memory management unit
B) CPU
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) fragmentation
B) paging
C) none of the mentioned
D) mapping
  • 6. The address of a page table in memory is pointed by
A) page register
B) program counter
C) page table base register
D) stack pointer
  • 7. Program always deals with
A) absolute address
B) logical 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 internal fragmentation
B) a technique for overcoming fatal error
C) a paging technique
D) a technique for overcoming external fragmentation
  • 10. Operating System maintains the page table for
A) each process
B) each address
C) each instruction
D) each thread
  • 11. The address generated by the CPU is referred to as
A) None of the mentioned
B) Physical address
C) Logical address
D) Neither physical nor logical
  • 12. The address loaded into the memory address register of the memory is referred to as
A) Physical address
B) Logical 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) Memory mapping unit
B) Virtual to physical mapper
C) None of the mentioned
D) Memory management 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) none of the mentioned
C) external storage
D) physical memory
  • 16. If execution time binding is being used, then a process ______ be swapped to a different memory space.
A) can never
B) has to be
C) may
D) must
  • 17. Swapping requires a
A) motherboard
B) monitor
C) backing store
D) keyboard
  • 18. The backing store is generally a
A) disk large enough to accommodate copies of all memory images for all users
B) disk to provide direct access to the memory images
C) all of the mentioned
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) secondary storage
B) cpu
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) waiting
B) context – switch
C) all of the mentioned
D) execution
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