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Formative Test - 3
  • 1. CPU fetches the instruction from memory according to the value of
A) program counter
B) instruction register
C) status register
D) program status word
  • 2. A memory buffer used to accommodate a speed differential is called
A) disk buffer
B) cache
C) accumulator
D) stack pointer
  • 3. Which one of the following is the address generated by CPU?
A) none of the mentioned
B) physical address
C) absolute address
D) logical address
  • 4. Run time mapping from virtual to physical address is done by
A) PCI
B) None of the mentioned
C) Memory management unit
D) CPU
  • 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) fragmentation
D) none of the mentioned
  • 6. The address of a page table in memory is pointed by
A) program counter
B) stack pointer
C) page register
D) page table base register
  • 7. Program always deals with
A) relative address
B) physical address
C) absolute address
D) logical address
  • 8. The page table contains
A) page size
B) base address of each page in physical memory
C) none of the mentioned
D) page offset
  • 9. What is compaction?
A) a paging technique
B) a technique for overcoming external fragmentation
C) a technique for overcoming internal fragmentation
D) a technique for overcoming fatal error
  • 10. Operating System maintains the page table for
A) each thread
B) each process
C) each address
D) each instruction
  • 11. The address generated by the CPU is referred to as
A) Neither physical nor logical
B) None of the mentioned
C) Logical address
D) Physical address
  • 12. The address loaded into the memory address register of the memory is referred to as
A) Logical address
B) Logical address
C) Physical 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) delocation register
B) relocation register
C) basic 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) must
B) can never
C) may
D) has to be
  • 17. Swapping requires a
A) monitor
B) backing store
C) keyboard
D) motherboard
  • 18. The backing store is generally a
A) fast disk
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) 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) ready queue
B) cpu
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) waiting
C) context – switch
D) all of the mentioned
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