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Computer Fundamentals → Number System 11

The binary number system uses how many digits?
2
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Hexadecimal number system has a base of?
16
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Which letter represents the decimal value 10 in hexadecimal?
A
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The decimal value of hexadecimal FF is?
255
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The octal number system has a base of?
8
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Hexadecimal 1A in decimal is?
26
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Which number system is most natural for computers?
Binary
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Decimal 100 in hexadecimal is?
64
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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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Computer Fundamentals → Introduction to Computer 29

What is the decimal equivalent of binary 1010?
10
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ASCII stands for?
American Standard Code for Information Interchange
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How many bits are used in standard ASCII?
7
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Unicode uses how many bits in UTF-8 minimum?
8
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Binary 11111111 is equal to what decimal value?
255
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Convert decimal 25 to binary?
11001
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BCD stands for?
Binary Coded Decimal
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In 2's complement, how is -1 represented in 8-bit binary?
11111111
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The decimal value of octal 17 is?
15
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EBCDIC stands for?
Extended Binary Coded Decimal Interchange Code
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The 1's complement of binary 1010 is?
0101
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How many bytes does Unicode UTF-32 use per character?
4
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Binary addition: 1 + 1 = ?
10
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The most significant bit (MSB) is located at?
Leftmost position
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How many different values can 8 bits represent?
256
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Which encoding supports all world languages?
Unicode
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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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