Top 250+ Solved Operating System Advanced MCQ Questions Answer
Q. The real time task
a. The tasks that reacts to events that take place in out side world.
b. The tasks that do not reacts to the outside world events.
c. The tasks are independent of the time when it occurs.
d. None of these.
Q. Hard real-time tasks are
a. A real time task that do not require dead line constraints.
b. A real time task that requires dead line constraints.
c. A task independent to time when it occurs.
d. None of these.
Q. The deterministic operating system
a. Where operations are performed with in pre-determined time interval.
b. Where operations can be performed with out pre-determined time interval.
Q. In Responsive real time operating system
a. The interruption is acknowledge and operating system response to interrupt.
b. Once the operation starts no interrupt is acknowledge.
c. The operation completes in fixed inter of time.
d. None of these.
Q. In multi processor scheduling; A: Gang scheduling, B: Dynamic scheduling, C: Dedicated processor management.; 1- The number of threads in a process can be altered during the course of execution. 2- This provides implicit scheduling defined by the assignment of threads to processors, 3- It is applied to the simultaneous scheduling of threads that make up a single process.
a. A – 1, B – 2, C – 3
b. A – 2, B – 1, C – 3
c. A – 1, B – 3, C – 2
d. A – 3, B – 1, C – 1
Q. In soft real time tasks
a. The dead line is always mandatory.
b. The dead line is desirable but not mandatory.
c. The results are independent of the time, when it took place.
d. None of these.
Q. In real time scheduling: A: Static table driven approach, B: Static priority driven preemptive approach, C: Dynamic planning based approach; 1- A static analysis of feasible scheduler of dispatching is done and implemented. 2- A static analysis of feasible schedules of dispatching is done and assigns priorities to tasks. 3- Feasibility is determined at run time.
a. A – 1, B – 2, C – 3
b. A – 2, B – 3, C – 1
c. A – 3, B – 1, C – 2
d. None of these.
Q. Match the following I/O devices : A- Keyboard, 1- Human readable, B- Disk and tape drives, 2- Communication, C- Modems, 3-Machine readable
a. A – 1, B – 3, C – 2
b. A – 1, B – 2, C – 3
c. A – 3, B – 2, C – 1
d. A – 2, B – 1, C – 3
Q. Arrange the following I/O device in increasing data rate Hard disk, Floppy disk, Key board
a. Key board, Floppy disk, Hard disk
b. Floppy disk, Key board, Hard disk
c. Key board, Hard disk, Floppy disk
d. Hard disk, Floppy disk, Key boar
Q. Resident set of process is
a. Portion of a process that is actually in main memory at any time.
b. Portion of a process that is actually in virtually memory at any time.
c. A and b both true.
d. None of these.
Q. Memory that is located on the disk either Hard or floppy is referred as
a. Virtual memory
b. Real memory
c. Main memory
d. None of these.
Q. The principle of locality states
a. The program and data references within a process tend to cluster.
b. The program and data references within a process do not tend to cluster.
c. A process actually referred in virtual memory.
d. None of these.
Q. In memory management : A- Fetch Policy B- Cleaning Policy C- Placement Policy: 1- It determines when a modified page should be written out to secondary memory. 2- It determines when a page should be bought into main memory. 3- It determines where in real memory a process piece is to be reside.
a. A – 1, B – 2, C – 3
b. A – 2, B – 1, C – 3
c. A – 2, B – 1, C – 3
d. A – 3, B – 1, C – 2
Q. In memory management when demand cleaning policy is applied
a. A modified page is written before their page frames are needed to so that pages can be written out in batches.
b. A page is written out to secondary memory only when it has been selected for replacement.
c. A and B both true.
d. None of these.