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Formative Test - 3
  • 1. CPU fetches the instruction from memory according to the value of
A) program status word
B) program counter
C) instruction register
D) status register
  • 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) physical address
B) none of the mentioned
C) absolute address
D) logical 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) mapping
B) paging
C) none of the mentioned
D) fragmentation
  • 6. The address of a page table in memory is pointed by
A) program counter
B) page table base register
C) page register
D) stack pointer
  • 7. Program always deals with
A) logical address
B) absolute address
C) physical address
D) relative address
  • 8. The page table contains
A) base address of each page in physical memory
B) none of the mentioned
C) page offset
D) page size
  • 9. What is compaction?
A) a paging technique
B) a technique for overcoming internal fragmentation
C) a technique for overcoming external fragmentation
D) a technique for overcoming fatal error
  • 10. Operating System maintains the page table for
A) each address
B) each process
C) each instruction
D) each thread
  • 11. The address generated by the CPU is referred to as
A) Logical address
B) None of the mentioned
C) Neither physical nor logical
D) Physical address
  • 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 management unit
B) Memory mapping unit
C) Virtual to physical mapper
D) None of the mentioned
  • 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) external storage
B) physical memory
C) none of the mentioned
D) secondary storage
  • 16. If execution time binding is being used, then a process ______ be swapped to a different memory space.
A) can never
B) may
C) has to be
D) must
  • 17. Swapping requires a
A) monitor
B) motherboard
C) keyboard
D) backing store
  • 18. The backing store is generally a
A) disk to provide direct access to the memory images
B) fast disk
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) secondary storage
B) ready queue
C) cpu
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) context – switch
B) all of the mentioned
C) waiting
D) execution
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