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Computer Fundamentals → Introduction to Computer 26

The binary representation of decimal 0 is?
0
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Gray code is also known as?
Reflected Binary Code
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In BCD, decimal 9 is represented as?
1001
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What is 2's complement of 10110?
01010
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Parity bit is used for?
Error detection
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Even parity means?
Number of 1s is even
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Decimal 255 in binary is?
11111111
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Floating point representation is used to store?
Real (decimal) numbers
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IEEE 754 is a standard for?
Floating-point arithmetic
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The sign bit in 2's complement representation of a signed integer: 0 means?
Positive
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ASCII code of 'A' (uppercase) is?
65
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ASCII code of lowercase 'a' is?
97
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Complement of 0 in binary is?
1
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The range of 8-bit unsigned integer is?
0 to 255
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The range of 8-bit signed integer (2's complement) is?
-128 to 127
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How many characters does extended ASCII support?
256
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Binary subtraction 1010 - 0011 = ?
0111
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In IEEE 754 single precision, how many bits represent the exponent?
8
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The word 'bit' is a contraction of?
Binary digit
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Convert octal 77 to decimal?
63
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Binary 1000 in decimal is?
8
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Convert decimal 64 to binary?
0100 0000
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Convert binary 11000000 to decimal?
192
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Octal 10 in decimal is?
8
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Decimal 128 in binary is?
10000000
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Adding binary 0110 + 0111 = ?
1101
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Computer Fundamentals → Number System 14

Hexadecimal is preferred over binary for programmers because?
It compactly represents binary
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The hexadecimal equivalent of binary 10101010 is?
AA
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How many bits in a nibble?
4
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Binary 1101 0011 in hexadecimal is?
D3
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Hexadecimal FF + 1 = ?
100 hex
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Which of the following is NOT a valid hexadecimal digit?
G
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Decimal 16 in hexadecimal is?
10
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The base of decimal number system is?
10
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Hexadecimal C in decimal is?
12
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Which number system uses 8 as its base?
Octal
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Hexadecimal 10 in decimal is?
16
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What is decimal 15 in hexadecimal?
F
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Binary 0000 1111 in hexadecimal is?
0F
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Hexadecimal FF in octal is?
377
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