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