Operating System Questions

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61.

The Banker's algorithm is used

A

to rectify deadlock

B

to detect deadlock

C

to prevent deadlock

D

to solve deadlock

Correct Answer: C

The Banker algorithm, sometimes referred to as the detection algorithm, is a resource allocation and deadlock avoidance algorithm developed by Edsger Dijkstra that tests for safety by simulating the allocation of predetermined maximum possible amounts of all resources, and then makes an "s-state" check to test for possible deadlock conditions for all other pending activities, before deciding whether allocation should be allowed to continue. Source : wikipedia.org

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62.

The primary purpose of an operating system is:

A

To make the most efficient use of the computer hardware

B

To allow people to use the computer

C

To keep systems programmers employed

D

To make computers easier to use

Correct Answer: A

An operating system (OS) is system software that manages computer hardware and software resources and provides common services for computer programs. For hardware functions such as input and output and memory allocation, the operating system acts as an intermediary between programs and the computer hardware, although the application code is usually executed directly by the hardware and frequently makes system calls to an OS function or is interrupted by it. Source : wikipedia.org

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63.

You can use print manage window

A

To check status of files in the print queue

B

To cancel the print job

C

To interrupt printing

D

All of the above

Correct Answer: D

None.

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64.

Which of the following operating system reads and reacts in actual time?

A

Quick Response System

B

Real Time System

C

Time Sharing System

D

Batch Processing System

Correct Answer: B

A real-time operating system (RTOS) is an operating system (OS) intended to serve real-time applications that process data as it comes in, typically without buffer delays. Processing time requirements (including any OS delay) are measured in tenths of seconds or shorter increments of time. A real time system is a time bound system which has well defined fixed time constraints.

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65.

All of the following are TRUE regarding virtual memory EXCEPT

A

Any amount of RAM can be allocated to virtual memory

B

The setting for the amount of hard disk drive space to allocate virtual memory can be manually change

C

This temporary storage is called the swap file or page file

D

Virtual memory is the physical space o the hard drive

Correct Answer: A

None.

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66.

The essential difference between an operating system like Linux and one like Windows is that

A

Windows can run with an Intel processor, whereas Linux cannot

B

Linux is a proprietary whereas Windows is not

C

There are multiple versions of Linux, but only one version of Windows

D

Any programmer can modify Linux code which is not permitted with Windows

Correct Answer: D

None.

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67.

What is dispatch latency?

A

The time taken by the dispatcher to stop one process and start another

B

The time taken by the processor to write a file into disk

C

The whole time taken by all processor

D

None of Above

Correct Answer: A

None.

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68.

A page fault occurs when

A

the Deadlock happens

B

the Segmentation starts

C

the page is found in the memory

D

the page is not found in the memory

Correct Answer: D

An interrupt that occurs when a program requests data that is not currently in real memory. The interrupt triggers the operating system to fetch the data from a virtual memory and load it into RAM. An invalid page fault or page fault error occurs when the operating system cannot find the data in virtual memory.

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69.

Whenever you move a directory from one location to another

A

All files inside the directory are moved

B

All the subdirectory inside that directory are moved

C

The directory is moved the source file is not moved

D

Both A and B

Correct Answer: D

All the files inside the directory and inside subdirectory are moved in that location

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70.

The Basic Input Output System (BIOS) resides in

A

RAM

B

ROM

C

The CPU

D

Memory Cache

Correct Answer: B

None.

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