555+ Computer Questions And Answers MCQ

Q:

Which file format can be added to a powerpoint show?

A) .Gif	B) .Wav
C) .Jpg	D) All of the above

Answer & Explanation Answer: D) All of the above

Explanation:

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Q:

Which memory needs refresh?

A) DRAM	B) SRAM
C) ROM	D) All of the above

Answer & Explanation Answer: A) DRAM

Explanation:

Memory refresh is the process of periodically reading information from an area of computer memory and immediately rewriting the read information to the same area without modification, for the purpose of preserving the information.

DRAM1532669979.png image

Memory refresh is a background maintenance process required during the operation of semiconductor dynamic random-access memory (DRAM), the most widely used type of computer memory.

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Q:

Backup means

A) Protecting data by copying it from the original source to a different destination	B) Accessing data on tape
C) Filtering old data from the new data	D) Adding more components to your network

Answer & Explanation Answer: A) Protecting data by copying it from the original source to a different destination

Explanation:

Protecting data by copying it from the original source to a different destination is called as Backup. When an original data is lossed, to restore the information by copying the data from the source to other destination is called as Backup or Data backup.

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Q:

In a spreadsheet program how is data organized?

A) Rows and columns	B) Layers and planes
C) Lines and spaces	D) All of the above

Answer & Explanation Answer: A) Rows and columns

Explanation:

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Q:

Operating system is an example of

A) Application software	B) System software
C) Both A & B	D) None of the above

Answer & Explanation Answer: B) System software

Explanation:

A computer software are of two types. They are :

1. System software

2. Application software

Systems software includes the operating system and all the utilities that enable the computer to function.

Application software includes programs that do real work for users.

Hence, Operating system is an example of system software.

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Q:

Which of the following is the lightest computer?

A) Desktop	B) Tablet
C) Laptop	D) Ultrabook

Answer & Explanation Answer: B) Tablet

Explanation:

The lightest computer is the tablet.

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Q:

AT&T designed its first commercial modem, specifically forconverting digital computer data to analog signals fortransmission across its long distance network. What is thename of the modem?

A) Telex	B) Memex
C) CompuServe	D) Bell 103 dataset

Answer & Explanation Answer:

Explanation:

In 1960s AT&T introduces its Data phone, the firstcommercial modem. The first commercial modem made for converting digital computer data at analog signalsfor transmission across long distance networks

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Q:

On the PC side the printer port is a