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Formative Test - 3
Contributed by: PRAN
  • 1. CPU fetches the instruction from memory according to the value of
A) program status word
B) program counter
C) status register
D) instruction register
  • 2. A memory buffer used to accommodate a speed differential is called
A) accumulator
B) cache
C) disk buffer
D) stack pointer
  • 3. Which one of the following is the address generated by CPU?
A) logical address
B) absolute address
C) none of the mentioned
D) physical address
  • 4. Run time mapping from virtual to physical address is done by
A) Memory management unit
B) None of the mentioned
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) paging
B) none of the mentioned
C) fragmentation
D) mapping
  • 6. The address of a page table in memory is pointed by
A) program counter
B) page register
C) stack pointer
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) page size
B) page offset
C) base address of each page in physical memory
D) none of the mentioned
  • 9. What is compaction?
A) a technique for overcoming external fragmentation
B) a paging technique
C) a technique for overcoming internal fragmentation
D) a technique for overcoming fatal error
  • 10. Operating System maintains the page table for
A) each instruction
B) each process
C) each thread
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) 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 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) delocation register
B) relocation register
C) basic register
D) relocation register
  • 15. The size of a process is limited to the size of
A) physical memory
B) none of the mentioned
C) external storage
D) secondary storage
  • 16. If execution time binding is being used, then a process ______ be swapped to a different memory space.
A) may
B) must
C) can never
D) has to be
  • 17. Swapping requires a
A) motherboard
B) backing store
C) monitor
D) keyboard
  • 18. The backing store is generally a
A) disk large enough to accommodate copies of all memory images for all users
B) all of the mentioned
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) cpu
C) secondary storage
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) execution
C) all of the mentioned
D) waiting
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