Top 250+ Solved Operating System Advanced MCQ Questions Answer
Q. A policy in memory management referred asclock policy because one can visualize the page frames as laid out in
a. Straight line
b. Rectangle
c. Circle
d. Square
Q. In memory management :A-Fixed allocation policy, B-Variable allocation policy: 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-In it a number of allocated frames are decided at initial load time.
a. A – 1, 3, B – 2
b. A – 1, B – 3
c. A – 2, B – 1, 3
d. A – 1, 2, B – 3
Q. 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
Q. 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
Q. In uni-processor scheduling, a priorities enforcement is
a. When processes are assigned priorities and scheduling policy favor higher priority processes.
b. The scheduling keeps resources of system busy.
c. Here currently running process can be interrupted and moved to ready state by the operating system.
d. None of these.
Q. In uni-processor scheduling, if non- preemptive policy is applied 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 moved to ready state by the operating system.
c. The clock interrupt is generated at periodic intervals.
d. None of these.
Q. 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 mandatory, 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.
Q. The time 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.
Q. 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 moved to ready state by the operating system.
c. The processes are assigned priorities.
d. None of these.
Q. The normalized turnaround time is
a. Ratio of turnaround time to service time
b. Ratio of turnaround time to waiting time
c. Ratio of service time to waiting time
d. Ratio of waiting time to service time.
Q. In round robin (time slicing) policy applied on uni-processor scheduling
a. When interrupt occurs, the currently running process is placed in ready queue, and next ready job is selected in First come First serve basis.
b. When interrupt occurs, the currently running process is placed in ready queue and next ready job is selected in random order.
Q. If normalized turnaround time of different process are given. Then Highest response ratio next policy in uni- processor scheduling policy selects.
a. The ready process with lowest normalized turnaround time.
b. The ready process with highest normalized turnaround time.
c. The process with shortest expected processing time.
d. The process with highest expected processing time.
Q. In multi processor scheduling, independent parallelism indicates
a. There is synchronization among processes at gross level.
b. There is no explicit synchronization among processes.
c. A parallel processing or multi tasking is done within a single application.
d. None of these.
Q. In round robin (time slicing) policy appliedon uni processor scheduling
a. When interrupt occurs, the currently running process is placed in ready queue, and next ready job is selected in First come First serve basis.
b. When interrupt occurs, the currently running process is placed in ready queue and next ready job is selected in random order.
Q. If normalized turnaround time of different process are given. Then Highest response ratio next policy in uni processor scheduling policy selects
a. The ready process with lowest normalized turnaround time.
b. The ready process with highest normalized turnaround time.
c. The process with shortest expected processing time.
d. The process with highest expected processing time.