Sail E0 Webinar

Computer Aptitude

OPERATING SYSTEM MCQs

Total Questions : 622 | Page 3 of 63 pages
Question 21. A system program that combines the separately compiled modules of a program into a form suitable for execution
  1.    assembler
  2.    linking loader
  3.    cross compiler
  4.    load and go
  5.    None of the above
 Discuss Question
Answer: Option B. -> linking loader
Question 22. Process is
  1.    program in High level language kept on disk
  2.    contents of main memory
  3.    a program in execution
  4.    a job in secondary memory
  5.    None of the above
 Discuss Question
Answer: Option C. -> a program in execution
Question 23. Addressing structure
  1.    defines the fundamental method of determining effective operand addresses
  2.    are variations in the use of fundamental addressing structures, or some associated actions which are related to addressing.
  3.    performs indicated operations on two fast registers of the machine and leave the result in one of the registers.
  4.    all of the above
  5.    None of the above
 Discuss Question
Answer: Option A. -> defines the fundamental method of determining effective operand addresses
Question 24. The strategy of allowing processes that are logically runnable to be temporarily suspended is called
  1.    preemptive scheduling
  2.    non preemptive scheduling
  3.    shortest job first
  4.    first come first served
  5.    None of the above
 Discuss Question
Answer: Option A. -> preemptive scheduling
Question 25. The Memory Buffer Register (MBR)
  1.    is a hardware memory device which denotes the location of the current instruction being executed.
  2.    is a group of electrical circuits (hardware), that performs the intent of instructions fetched from memory.
  3.    contains the address of the memory location that is to be read from or stored into.
  4.    contains a copy of the designated memory location specified by the MAR after a "read" or the new contents of the memory prior to a "write".
  5.    None of the above
 Discuss Question
Answer: Option D. -> contains a copy of the designated memory location specified by the MAR after a "read" or the new contents of the memory prior to a "write".
Question 26. The Storage-to-Storage instructions
  1.    have both their operands in the main store.
  2.    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, expect in the case of store operation when it is also
  3.    which perform indicated operations on two fast registers of the machine and have the result in one of the registers
  4.    all of the above
  5.    None of the above
 Discuss Question
Answer: Option A. -> have both their operands in the main store.
Question 27. The LRU algorithm
  1.    pages out pages that have been used recently
  2.    pages out pages that have not been used recently
  3.    pages out pages that have been least used recently
  4.    pages out the first page in a given area
  5.    None of the above
 Discuss Question
Answer: Option C. -> pages out pages that have been least used recently
Question 28. Which of the following systems software does the job of merging the records from two files into one?
  1.    Security software
  2.    Utility program
  3.    Networking software
  4.    Documentation system
  5.    None of the above
 Discuss Question
Answer: Option B. -> Utility program
Question 29. Fork is
  1.    the dispatching of a task
  2.    the creation of a new job
  3.    the creation of a new process
  4.    increasing the priority of a task
  5.    None of the above
 Discuss Question
Answer: Option C. -> the creation of a new process
Question 30. Thrashing
  1.    is a natural consequence of virtual memory systems
  2.    can always be avoided by swapping
  3.    always occurs on large computers
  4.    can be caused by poor paging algorithms
  5.    None of the above
 Discuss Question
Answer: Option D. -> can be caused by poor paging algorithms

Latest Videos

Latest Test Papers