Operating System Basics Questions and Answers

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Q381
The memory management, y one clock policy is applied then the page first loaded into a frame in memory its use bit is set to
  • A Zero
  • B One
  • C Two
  • D Three
Answer: Option B
Q382
In memory management Free page list as : A-A list of page frames available for reading in pages. B- A list where replaced page is assigned without modification. C-A list where replaced page is assigned with modification.
  • A A, B, C are true
  • B A and B are true
  • C A and C are true
  • D B and C are true
Answer: Option B
Q383
A policy in memory management referred as clock policy because one can vasualize the page frames as laid out in
  • A Straight line
  • B Rectangle
  • C Circle
  • D Square
Answer: Option C
Q384
In memory management : A-Fixed allocation policy, B-Variable allocation polocy: 1-it gives a process a fixed number of frames in main memory within which to execute. 2-It allows the number of page frames allocated to a process to be varied over the life time of the process. 3-It a number of allocated frames are decided at initial load time.
  • A A-1, 3, B-2
  • B A-2, B-1, 3
  • C A-2, B-1, 3
  • D A-1, 2, B-3
Answer: Option A
Q385
In uni-processor scheduling : A : Turnaround time, B : Response time, 1: A time interval between the submission of a process and its completion. 2: For interactive process, it is a time from the submission of a request until the response begins to received. 3: It includes actual execution time plus time spent waiting for resources.
  • A A-2,2, B-3
  • B A-1, 3, B-2
  • C A-2, B-1, 2
  • D A-2, B-1, 3
Answer: Option B
Q386
In uni-processor management processor through put
  • A Is a measure of how much work is being performed
  • B Is the percentage of time that the processor is busy
  • C is a time interval between the submission of a process and its completion
  • D None of these
Answer: Option A
Q387
In uni-pricessor scheduling, if non-preemptive policy is applied then
  • A Once a processor is in running state, it continues to execute until it terminates or blck itself.
  • B Currently running process can be interrupted and moved to ready state by the operating system
  • C The clock interrupt is generated at periodic intervals.
  • D None of these
Answer: Option A
Q388
In aperiodic (real time) tasks
  • A The dead line for start is mandatory, but for finish it is not.
  • B The dead line for finish is mandatry, but for start it is not.
  • C The dead line for finish and start is mandatory.
  • D The dead line for finish and start is not mandatory
Answer: Option C
Q389
The times table of railway, and airline which defines arrival and departure can be considered as
  • A Hard real time scheduling
  • B Soft real time scheduling
  • C None real time scheduling
  • D None of these
Answer: Option A
Q390
When preemptive policy is applied to uni-processor scheduling then
  • A Once a process is in running state, it continues to execute until it terminates or block itself.
  • B Currently running process can be interrupted and rmoved to ready state by the operating system
  • C The processes are assigned priorites.
  • D None of these
Answer: Option B

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