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Formative Test - 3
  • 1. CPU fetches the instruction from memory according to the value of
A) program counter
B) status register
C) instruction 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) absolute address
B) none of the mentioned
C) logical address
D) physical address
  • 4. Run time mapping from virtual to physical address is done by
A) None of the mentioned
B) CPU
C) PCI
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) paging
C) mapping
D) fragmentation
  • 6. The address of a page table in memory is pointed by
A) program counter
B) stack pointer
C) page table base register
D) page register
  • 7. Program always deals with
A) relative address
B) physical address
C) absolute address
D) logical 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 technique for overcoming internal fragmentation
B) a technique for overcoming external fragmentation
C) a paging technique
D) a technique for overcoming fatal error
  • 10. Operating System maintains the page table for
A) each thread
B) each process
C) each instruction
D) each address
  • 11. The address generated by the CPU is referred to as
A) None of the mentioned
B) Physical address
C) Neither physical nor logical
D) Logical address
  • 12. The address loaded into the memory address register of the memory is referred to as
A) Logical address
B) Physical address
C) None of the mentioned
D) Logical address
  • 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) Memory management unit
D) None of the mentioned
  • 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) 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) must
C) has to be
D) may
  • 17. Swapping requires a
A) monitor
B) backing store
C) keyboard
D) motherboard
  • 18. The backing store is generally a
A) all of the mentioned
B) disk large enough to accommodate copies of all memory images for all users
C) disk to provide direct access to the memory images
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) execution
C) waiting
D) context – switch
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