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Computer Aptitude

OPERATING SYSTEM MCQs

Total Questions : 814 | Page 82 of 82 pages
Question 811. Which is the first program run on a computer when the computer boots up?
  1.    None
  2.    Operating system
  3.    System operations
  4.    System software
 Discuss Question
Answer: Option B. -> Operating system
Question 812. The initial value of the semaphore that allows only one of the many processes to enter their critical sections, is
  1.    None of these
  2.    1
  3.    0
  4.    16
  5.    8
 Discuss Question
Answer: Option B. -> 1
Question 813. A page fault
  1.    None of these
  2.    occurs when a program accesses a page of memory
  3.    is an error is a specific page
  4.    is a reference to a page belonging to another program
  5.    is an access to a page not currently in memory
 Discuss Question
Answer: Option E. -> is an access to a page not currently in memory
Question 814. The Register - to - Register (RR) instructions
  1.    which perform an operation on a register operand and an operand which is located in the main store, generally leaving the result in the register, except in the case of store operation when it is also
  2.    which perform indicated operations on two fast registers of the machine and leave the result in one of the registers.
  3.    All of these
  4.    None of these
  5.    have both their operands in the main store.
 Discuss Question
Answer: Option B. -> which perform indicated operations on two fast registers of the machine and leave the result in one of the registers.

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