Category: Operating System Objective Questions

Operating System Multiple Choice Questions on “Tertiary Storage”.

1. Tertiary storage is built with ____________
a) a lot of money
b) unremovable media
c) removable media
d) secondary storage

Answer: c

2. Floppy disks are examples of ____________
a) primary storage
b) secondary storage
c) tertiary storage
d) none of the mentioned

Answer: c

3. What is a magneto-optic disk?
a) primary storage
b) secondary storage
c) removable disk
d) none of the mentioned

Answer: c

4. The magneto-optic head flies ___________ the disk surface than a magnetic disk head does.
a) much farther from
b) much closer to
c) at the same distance as
d) none of the mentioned

Answer: a

5. Optical disks ______ magnetism.
a) use
b) do not use
c) may use
d) none of the mentioned

Answer: b

6. The phase change disk is coated with a material that can freeze into either _______ or ________ state.
a) crystalline, solid
b) ice, amorphous
c) crystalline, liquid
d) crystalline, amorphous

Answer: d

7. WORM stands for ____________
a) write only, read mandatory
b) write once, read many times
c) write only once, read multiple
d) none of the mentioned

Answer: b

8. A tape holds _______ data than optical or magnetic disk cartridge.
a) lesser
b) more
c) much lesser
d) none of the mentioned

Answer: b

9. Random access to tape is _______ a disk seek.
a) much slower than
b) much faster than
c) comparable to
d) none of the mentioned

Answer: a

10. A typical tape drive is ________ a typical disk drive.
a) more expensive than
b) cheaper than
c) of the same cost as
d) none of the mentioned

Answer: a

11. The surface area of tape is ________ the surface area of a disk.
a) much lesser than
b) much larger than
c) equal to
d) none of the mentioned

Answer: b

Operating System Multiple Choice Questions on “CPU Scheduling”.

1. Which module gives control of the CPU to the process selected by the short-term scheduler?
a) dispatcher
b) interrupt
c) scheduler
d) none of the mentioned

Answer: a
Clarification: None.

2. The processes that are residing in main memory and are ready and waiting to execute are kept on a list called _____________
a) job queue
b) ready queue
c) execution queue
d) process queue

Answer: b
Clarification: None.

3. The interval from the time of submission of a process to the time of completion is termed as ____________
a) waiting time
b) turnaround time
c) response time
d) throughput

Answer: b
Clarification: None.

4. Which scheduling algorithm allocates the CPU first to the process that requests the CPU first?
a) first-come, first-served scheduling
b) shortest job scheduling
c) priority scheduling
d) none of the mentioned

Answer: a
Clarification: None.

5. In priority scheduling algorithm ____________
a) CPU is allocated to the process with highest priority
b) CPU is allocated to the process with lowest priority
c) Equal priority processes can not be scheduled
d) None of the mentioned

Answer: a
Clarification: None.

6. In priority scheduling algorithm, when a process arrives at the ready queue, its priority is compared with the priority of ____________
a) all process
b) currently running process
c) parent process
d) init process

Answer: b
Clarification: None.

7. Which algorithm is defined in Time quantum?
a) shortest job scheduling algorithm
b) round robin scheduling algorithm
c) priority scheduling algorithm
d) multilevel queue scheduling algorithm

Answer: b
Clarification: None.

8. Process are classified into different groups in ____________
a) shortest job scheduling algorithm
b) round robin scheduling algorithm
c) priority scheduling algorithm
d) multilevel queue scheduling algorithm

Answer: d
Clarification: None.

9. In multilevel feedback scheduling algorithm ____________
a) a process can move to a different classified ready queue
b) classification of ready queue is permanent
c) processes are not classified into groups
d) none of the mentioned

Answer: a
Clarification: None.

10. Which one of the following can not be scheduled by the kernel?
a) kernel level thread
b) user level thread
c) process
d) none of the mentioned

Answer: b
Clarification: User level threads are managed by thread library and the kernel is unaware of them.

Operating System Questions on “Swapping Processes” and will also be useful for interview preparations for experienced people.

1. The address generated by the CPU is referred to as ____________
a) Physical address
b) Logical address
c) Neither physical nor logical
d) None of the mentioned

Answer: b
Clarification: None.

2. The address loaded into the memory address register of the memory is referred to as ____________
a) Physical address
b) Logical address
c) Neither physical nor logical
d) None of the mentioned

Answer: a
Clarification: None.

3. The run time mapping from virtual to physical addresses is done by a hardware device called the ____________
a) Virtual to physical mapper
b) Memory management unit
c) Memory mapping unit
d) None of the mentioned

Answer: b
Clarification: None.

4. The base register is also known as the ____________
a) basic register
b) regular register
c) relocation register
d) delocation register

Answer: c
Clarification: None.

5. The size of a process is limited to the size of ____________
a) physical memory
b) external storage
c) secondary storage
d) none of the mentioned

Answer: a
Clarification: None.

6. If execution time binding is being used, then a process ______ be swapped to a different memory space.
a) has to be
b) can never
c) must
d) may

Answer: d
Clarification: None.

7. Swapping requires a _________
a) motherboard
b) keyboard
c) monitor
d) backing store

Answer: d
Clarification: None.

8. The backing store is generally a ____________
a) fast disk
b) disk large enough to accommodate copies of all memory images for all users
c) disk to provide direct access to the memory images
d) all of the mentioned

Answer: d
Clarification: None.

9. The ________ consists of all processes whose memory images are in the backing store or in memory and are ready to run.
a) wait queue
b) ready queue
c) cpu
d) secondary storage

Answer: b
Clarification: None.

10. The _________ time in a swap out of a running process and swap in of a new process into the memory is very high.
a) context – switch
b) waiting
c) execution
d) all of the mentioned

Answer: a
Clarification: None.

11. The major part of swap time is _______ time.
a) waiting
b) transfer
c) execution
d) none of the mentioned

Answer: b
Clarification: None.

12. Swapping _______ be done when a process has pending I/O, or has to execute I/O operations only into operating system buffers.
a) must
b) can
c) must never
d) maybe

Answer: c
Clarification: None.

13. Swap space is allocated ____________
a) as a chunk of disk
b) separate from a file system
c) into a file system
d) all of the mentioned

Answer: a

Operating System Multiple Choice Questions on “Compression”.

1. The major difference between a multimedia file and a regular file is ___________
a) the size
b) the attributes
c) the ownership
d) the rate at which the file must be accessed

Answer: d
Clarification: Multimedia files must be accessed at a specific rate whereas accessing regular files requires no special timings.

2. Video is represented as a series of images formally known as ___________
a) pics
b) shots
c) frames
d) snaps

Answer: c
Clarification: None.

3. The faster the frames are displayed, ___________
a) the rougher the video appears
b) the smoother the video appears
c) it gets blurry
d) none of the mentioned

Answer: b
Clarification: None.

4. The characteristic of the eye to retain the image for a short time after it has been presented is known as ___________
a) persistence of vision
b) learning power
c) memory mapped input
d) none of the mentioned

Answer: a
Clarification: None.

5. When will Local playback be used?
a) the multimedia data are delivered from a local file system
b) a computer next to you is playing something
c) a multimedia file is being played on a system in the local network
d) none of the mentioned

Answer: a
Clarification: None.

6. Multimedia files stored on a remote server are delivered to a client across the network using a technique known as ___________
a) download
b) streaming
c) flowing
d) leaking

Answer: b
Clarification: None.

7. What are the two types of streaming techniques?
a) progressive download & real time streaming
b) regular download & real time streaming
c) real time & virtual time streaming
d) virtual time streaming

Answer: a
Clarification: None.

8. A media file containing audio or video is downloaded and stored on the client’s local file system in ___________
a) progressive download
b) regular download
c) real time streaming
d) virtual time streaming

Answer: a
Clarification: As the file is being downloaded, the client is able to play back the media file without having to wait for the file to be downloaded in its entirety.

9. Progressive download is most useful for ___________
a) short video clips
b) long video clips
c) extremely long and high quality videos
d) none of the mentioned

Answer: a
Clarification: None.

10. The media file is streamed to the client but is only played and not stored by the client in ___________
a) progressive download
b) regular download
c) real time streaming
d) virtual time streaming

Answer: c
Clarification: None.

11. Real time streaming is most useful for ___________
a) short video clips
b) long video clips
c) extremely short and low quality videos
d) none of the mentioned

Answer: b

Operating System Multiple Choice Questions on “Thread Cancellation”.

1. What is Thread cancellation?
a) the task of destroying the thread once its work is done
b) the task of removing a thread once its work is done
c) the task of terminating a thread before it has completed
d) none of the mentioned

Answer: c
Clarification: None.

2. When a web page is loading, and the user presses a button on the browser to stop loading the page?
a) the thread loading the page continues with the loading
b) the thread loading the page does not stop but continues with another task
c) the thread loading the page is paused
d) the thread loading the page is cancelled

Answer: d
Clarification: None.

3. When one thread immediately terminates the target thread, it is called ____________
a) Asynchronous cancellation
b) Systematic cancellation
c) Sudden Termination
d) Deferred cancellation

Answer: a
Clarification: None.

4. When the target thread periodically checks if it should terminate and terminates itself in an orderly manner, it is called?
a) Asynchronous cancellation
b) Systematic cancellation
c) Sudden Termination
d) Deferred cancellation

Answer: d
Clarification: None.

5. Cancelling a thread asynchronously ____________
a) frees all the resources properly
b) may not free each resource
c) spoils the process execution
d) none of the mentioned

Answer: b
Clarification: None.

6. Cancellation point is the point where ____________
a) the thread can be cancelled – safely or otherwise doesn’t matter
b) the thread can be cancelled safely
c) the whole process can be cancelled safely
d) none of the mentioned

Answer: b
Clarification: None.

7. If multiple threads are concurrently searching through a database and one thread returns the result then the remaining threads must be ____________
a) continued
b) cancelled
c) protected
d) none of the mentioned

Answer: b