Operating System Basics Questions and Answers

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Q311
Instruction register contains
  • A The address of an instruction to be feteched
  • B The instructions most recently fetched.
  • C The Data to be written into memory.
  • D The data to be read from memory.
Answer: Option B
Q312
The following
  • A Start ? Fetch next instruction? Execute instruction ? Halt, represents
  • B instruction cycle with interrupt
  • C Instruction cycle without interrupt
  • D Instruction Cycle with two interrupts
Answer: Option C
Q313
Instruction processing consists of
  • A Fetch cycle only
  • B Execution cycle only
  • C Fetch and Execution cycle both
  • D None of these
Answer: Option C
Q314
Operating System is
  • A Software
  • B Hardware
  • C Software and Hardware both
  • D None of these
Answer: Option A
Q315
The concept used to support multi programming environment on a computer is
  • A Virtual memory
  • B hierachy of physical memory
  • C Display of multiple windows
  • D None the above
Answer: Option C
Q316
Which combination of the folowing features will siffice to characterize an OS as a multi programmed OS? (i)More than one program may be loaded into main memory at the same time for execution. (ii)If a program waits for certain events such as I/O, another program is immediately scheduled for execution. (iii)If the execution of a program terminates, another program is immediately scheduled for execution.
  • A (i) only
  • B (ii) and (iii)
  • C (i) and (iii)
  • D (i), (ii) and (iii)
Answer: Option D
Q317
Which combination of the folowing features will siffice to characterize an OS as a multi programmed OS? (i)More than one program may be loaded into main memory at the same time for execution. (ii)If a program waits for certain events such as I/O, another program is immediately scheduled for execution. (iii)If the execution of a program terminates, another program is immediately scheduled for execution.
  • A (i) only
  • B (ii) and (iii)
  • C (i) and (iii)
  • D (i), (ii) and (iii)
Answer: Option D
Q318
Turnaround time is defined as
  • A Delay between job submission and job completion
  • B A waiting time
  • C Both (A) and (B) above
  • D None of these
Answer: Option A
Q319
The only state transition initiated by the user process itself in an operating system is
  • A Block
  • B Timer run out
  • C Dispatch
  • D Wake up
Answer: Option A
Q320
Window 98 is a
  • A Single user system
  • B Multi user system
  • C Single tasking system
  • D None of these
Answer: Option A

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