Basic Operating System MCQ

Basic Operating System MCQ
511. A monitor program is a program that
  • interprets the iterrupt calls
  • restres the status of the CPU after a function call
  • interprets the input from akeyboard and converts the input into it binary equivalent
  • checks the status of the I/O devices
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512. The process sheduler in the processor management unit
  • gives ll jobs to the job scheduler
  • selects a job to run
  • selects a process to run
  • co-ordinates the process synchronization
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513. Round robin is a
  • kind of magnetic drum
  • process scheduling policy
  • process synchronization policy
  • memory allocation policy
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514. Which is the correct definition of a valid prcess transittion in an operating system ?
  • Wake up: ready ? running
  • Dispatch : ready ? running
  • Block : ready ? running
  • Timer runout : ready ? blocked
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515. A critical section is a program segment
  • Which should run in a certain specified amount of time.
  • Which avoids deadlocks
  • Where shared resources are accessed
  • which mut be encolsed by a pair of semaphore operations.
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516. Which of the following is an example of a spooled device ?
  • A line printer used to print the output of a nummber of jobs
  • A terminal used to enter input data to a running program
  • A secondary storage device in a virtual memory system
  • A graphic display device.
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517. A solution to the Dining Philosophers probemswhich avoids deadlock is
  • ensure that all philosophers pick up the left fork before the right fork
  • ensure that all philosophers pick up the right fork beforre the left fork.
  • 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.
  • None of the above
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518. Locality f reference implies that the page reference being made by a process
  • will always be to the page used in the previous page reference
  • ensure that all philosophers pick up the right fork before the left fork.
  • 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.
  • None of the above
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519. Locality of reference implies that the page reference being made by a process
  • will always be to the page used in the previous page reference.
  • is likely to be to one of the pages used in the last few page references
  • will always be to one of the pages existing in memory
  • will always lead to a page fault.
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520. 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-2, B-4, C-1, D-3
  • A-1, B-2, C-3, D-4
  • A-2, B-1, C-4, D-3
  • None of these
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