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Formative Test - 3
  • 1. CPU fetches the instruction from memory according to the value of
A) instruction register
B) status register
C) program status word
D) program counter
  • 2. A memory buffer used to accommodate a speed differential is called
A) stack pointer
B) disk buffer
C) accumulator
D) cache
  • 3. Which one of the following is the address generated by CPU?
A) physical address
B) logical address
C) absolute address
D) none of the mentioned
  • 4. Run time mapping from virtual to physical address is done by
A) Memory management unit
B) CPU
C) PCI
D) None of the mentioned
  • 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) fragmentation
D) mapping
  • 6. The address of a page table in memory is pointed by
A) stack pointer
B) page register
C) program counter
D) page table base register
  • 7. Program always deals with
A) physical address
B) relative address
C) absolute address
D) logical address
  • 8. The page table contains
A) none of the mentioned
B) base address of each page in physical memory
C) page offset
D) page size
  • 9. What is compaction?
A) a paging technique
B) a technique for overcoming external fragmentation
C) a technique for overcoming fatal error
D) a technique for overcoming internal fragmentation
  • 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) None of the mentioned
C) Logical address
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) delocation register
C) basic register
D) relocation register
  • 15. The size of a process is limited to the size of
A) none of the mentioned
B) external storage
C) physical memory
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) must
C) has to be
D) may
  • 17. Swapping requires a
A) monitor
B) backing store
C) motherboard
D) keyboard
  • 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) ready queue
C) cpu
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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