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Computer Basics Interview Questions and Answers

Ques 6. What is Binary?

Ans.

Binary describes a numbering scheme in which there are only two possible values for each digit: 0 and 1. The term also refers to any digital encoding/decoding system in which there are exactly two possible states.In digital data memory, storage, processing, and communications, the 0 and 1 values are sometimes called "low" and "high," respectively.

Binary numbers look strange when they are written out directly.This is because the digits weight increases by powers of 2, rather than by powers of 10. In a digital numeral, the digit furthest to the right is the "ones" digit; the next digit to the left is the "twos" digit; next comes the "fours" digit, then the "eights" digit, then the "16s" digit, then the "32s" digit, and so on.The decimal equivalent of a binary number can be found by summing all the digits.For example, the binary 10101 is equivalent to the decimal = 1x20 + 0x21 + 1x22 + 0x23 + 1x24 = 1 + 4 + 16 = 21:

DECIMAL = 216432168421
BINARY = 101010010101

The numbers from decimal 0 through 15 in decimal, binary, octal and hexadecimal form are listed below.

DECIMALBINARYOCTALHEXA-
DECIMAL
0000000
1000111
2001022
3001133
4010044
5010155
6011066
7011177
81000108
91001119
10101012A
11101113B
12110014C
13110115D
14111016E
15111117F

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Ques 7. What is Byte?
Ans. A Byte is equal to 8 Bits. A Byte can represent 256 states of information, for example, numbers or a combination of numbers and letters. 1 Byte could be equal to one character. 10 Bytes could be equal to a word. 100 Bytes would equal an average sentence.
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Ques 8. What is Button?
Ans. A button does some command in a program when it is clicked. Buttons usually have a 3-dimensional look, although you may have to move the mouse over the button for it to look 3D. You should single-click on buttons (do not double-click).
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Ques 9. What is CD-R?
Ans. Compact Disc Recordable. A special type of compact disc which can have information written onto it once. You must have a special CD-R drive to write to these discs, but most CD-ROM drives can read them.
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Ques 10. What is Activate of Windows?
Ans. To make a window active by bringing it to the front. You can activate a window by clicking on the window and the window comes in front of all windows.
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