Operating System Basics Questions and Answers

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Q511
A monitor program is a program that
  • A interprets the iterrupt calls
  • B restres the status of the CPU after a function call
  • C interprets the input from akeyboard and converts the input into it binary equivalent
  • D checks the status of the I/O devices
Answer: Option C
Q512
The process sheduler in the processor management unit
  • A gives ll jobs to the job scheduler
  • B selects a job to run
  • C selects a process to run
  • D co-ordinates the process synchronization
Answer: Option C
Q513
Round robin is a
  • A kind of magnetic drum
  • B process scheduling policy
  • C process synchronization policy
  • D memory allocation policy
Answer: Option B
Q514
Which is the correct definition of a valid prcess transittion in an operating system ?
  • A Wake up: ready ? running
  • B Dispatch : ready ? running
  • C Block : ready ? running
  • D Timer runout : ready ? blocked
Answer: Option B
Q515
A critical section is a program segment
  • A Which should run in a certain specified amount of time.
  • B Which avoids deadlocks
  • C Where shared resources are accessed
  • D which mut be encolsed by a pair of semaphore operations.
Answer: Option C
Q516
Which of the following is an example of a spooled device ?
  • A A line printer used to print the output of a nummber of jobs
  • B A terminal used to enter input data to a running program
  • C A secondary storage device in a virtual memory system
  • D A graphic display device.
Answer: Option A
Q517
A solution to the Dining Philosophers probemswhich avoids deadlock is
  • A ensure that all philosophers pick up the left fork before the right fork
  • B ensure that all philosophers pick up the right fork beforre the left fork.
  • C ensure that one partcular philosopher picks up the left fork before the right fork, and all other philosophers pick up the right fork before the left fork.
  • D None of the above
Answer: Option C
Q518
Locality f reference implies that the page reference being made by a process
  • A will always be to the page used in the previous page reference
  • B ensure that all philosophers pick up the right fork before the left fork.
  • C Ensure that one partiular philosopher picks up the left fork before the right fork,and all other philosophers pick up the right fork before the left fork.
  • D None of the above
Answer: Option C
Q519
Locality of reference implies that the page reference being made by a process
  • A will always be to the page used in the previous page reference.
  • B is likely to be to one of the pages used in the last few page references
  • C will always be to one of the pages existing in memory
  • D will always lead to a page fault.
Answer: Option B
Q520
The correct matching for the following pairs is - (A) Disk suchduling, (1) Round robin, (B) Batch processing, (2) SCAN, (C) Time sharing, (3) LIFO, (D) Interrupt processing, (4) FIFO
  • A A-2, B-4, C-1, D-3
  • B A-1, B-2, C-3, D-4
  • C A-2, B-1, C-4, D-3
  • D None of these
Answer: Option A

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