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 Computer Questions

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Q:

A modem ______

A) translates analog signals from a computer into digital signals that can travel along conventional telephone lines B) translates digital signals from a computer into analog signals that can travel along conventional telephone lines
C) demodulates digital signals from a computer D) modulates signals an analog telephone line
 
Answer & Explanation Answer: B) translates digital signals from a computer into analog signals that can travel along conventional telephone lines

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Q:

The difference between a virus and a self-replicating program which is like a virus is that rather than creating copies of itself on only one system it propagate through computer network. What is that called as _____

A) Keylogger B) Worm
C) Time Bomb D) Cracker
 
Answer & Explanation Answer: B) Worm

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Q:

The output quality of a printer is measured by

A) Dots per line B) Dots printed per unit time
C) Dots per inch D) All of the above
 
Answer & Explanation Answer: C) Dots per inch

Explanation:

DPI [Dots Per Inch] is a measurement of output quality of printer resolution. It represents number of ink dots the printer can place in an area of one square inch. The lesser the DPI the less sharper the image and vice versa.

 

Therefore, a printer that may have 400 DPI, a printer that can print 400 x 400 per square inch or 1,60,000 dots per inch.

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Q:

The brain of any computer system is

A) CPU B) Memory
C) Control D) ALU
 
Answer & Explanation Answer: A) CPU

Explanation:

Central Processing Unit (CPU) is the brain of any computer system.

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Q:

A program which helps create written documents and lets you go back and make corrections as necesary ______

A) Spreadsheet B) Personal writer
C) Word printer D) Word processor
 
Answer & Explanation Answer: D) Word processor

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Q:

OCR stands for

A) Optical Character Recognition B) Optical CPU Recognition
C) Optimal Character Rendering D) Other Character Restoration
 
Answer & Explanation Answer: A) Optical Character Recognition

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Q:

Fifth generation computer is also known as

A) Very Large Scale Integration (VLSI) B) Knowledge information processing system
C) Both A & B D) None of the above
 
Answer & Explanation Answer: B) Knowledge information processing system

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Q:

Which is NOT a good Web security strategy ?

A) Remove unnecessary compilers and interpreters B) Add demo programs, so users can test system without accessing production data
C) Limit the users who can load software, edit or add files D) Restrict access to the Web server keep a minimum number of ports open
 
Answer & Explanation Answer: A) Remove unnecessary compilers and interpreters

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