Operating System Basics Questions and Answers

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Q241
The wait operation
  • A Decrements the semaphore value
  • B Inrements the semaphore value
  • C Fixes the semaphore value
  • D None of these
Answer: Option A
Q242
In semaphore, the process executing the wait is blocked if
  • A The semaphore value becomes negative
  • B The semaphore value become positive
  • C The semaphore value becomes non-positive
  • D The semaphore value becomes non-negative
Answer: Option B
Q243
In semaphore the process blocked by wait operation is unblocked if
  • A Semaphore value becomes non- negative
  • B Semaphore value becomes non-posiive
  • C Semaphore value is negative
  • D Semaphore value is positive
Answer: Option B
Q244
The compaction is the technique in memory management that is used to over come
  • A Internal fragmentation
  • B External fragmentation
  • C Both (A) and (B)
  • D None of these
Answer: Option B
Q245
Physical address (absolute address ) in memory partitioning is
  • A Actual location in main memory
  • B A reference to memory location independent of current assignment
  • C A logical address
  • D None of these
Answer: Option A
Q246
The frame
  • A Can hold exactly one page of data
  • B Can hold more than one page of data
  • C Can hole two page of data
  • D None of these
Answer: Option A
Q247
The page table that is maintained by operating system
  • A Shows frame loation for each page of the process
  • B Shows actural address in main memory
  • C Referrer memory location to memory
  • D None of these
Answer: Option A
Q248
Match the following pairs A. Logical address   (1) An actual location in main memory B. Relative address     (2) An address is expressed as a location relative to some known point. C. A memory location independent of the current assignment of data to memory
  • A A-3, B-2, C-1
  • B A-2, B-1, C-3
  • C A-3, B-1, C-2
  • D A-1, B-2, C-3
Answer: Option A
Q249
The resident set of process is
  • A A process that are actually in main memory at anytimes
  • B A process that are actually in virtual memory at any time.
  • C A proces that are actually in disk
  • D None of these
Answer: Option D
Q250
Physical address in memory management is
  • A Actual location in main memory
  • B Memory location independent of current assigment of data tol memory
  • C Memory location dependent to some known point.
  • D None of these
Answer: Option A

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