CSC 100 | Study Mode

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Question 51
A
4
B
5
C
6
D
9
Explanation
The base 2 represents that the number is binary ,whereas, the base 10 represents that it is to be converted to the decimal format. Conversion: 22 * 1 + 21 * 1 + 20 *0 = 6.

Correct option: C
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Question 52
A
0
B
1
C
10
D
100
Explanation
2s complement is obtained by adding 1 to the 1s complement of the number. Here, Binary of 15 = 1111 1s complement of 15= 0000 2s complement of 15= 0000+1=0001.

Correct option: B
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Question 53
A
root
B
radix
C
entity
D
median
Explanation
Another name for base is radix. Base refers to the number of digits that a particular number system consists of. The base of decimal number system is 10 , binary is 2 and so on.

Correct option: B
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Question 54
A
0.5
B
0.625
C
0.25
D
0.875
Explanation
Since the base is 2 , it could be easily guessed that the number is binary. Conversion: 2-1 * 1 + 2-2 * 0 + 2-3 * 1 = 0.625.

Correct option: B
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Question 55
A
11
B
10000011
C
11111101
D
11111100
Explanation
Signed Magnitude of a number is a representation to determine if the number is positive or negative. If the MSB of a number is 0 , the number is positive , else if it is 1 the number is negative. Here, +3 = 00000011 -3= 100000011.

Correct option: B
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Question 56
A
True
B
False
Explanation
In a decimal number system, a number with both integer and a fractional part has digits raised to both positive and negative powers of 10 and not 2. e.g. 22.34 = 2 * 101 + 2 * 100 + 3 * 10-1 + 4 * 10-2.

Correct option: B
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Question 57
A
A
B
F
C
D
D
E
Explanation
The hexadecimal representations are as follows: 10 : A 11 : B 12 : C 13 : D 14 : E 15 : F.

Correct option: D
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Question 58
A
114
B
43.47
C
99.9A
D
10101
Explanation
All the numbers except 99.9A are decimal numbers. This number has a hexadecimal component A in it therefore, it is not a valid decimal number. The decimal equivalent of A is 10.

Correct option: C
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Question 59
A
(101)10 = (1100101)2
B
G is valid in hexadecimal system.
C
C represents 12
D
The base of a decimal number system is 10.
Explanation
G is not a valid hexadecimal number. In this system , only representations from A to E are used to represent the numbers from 10 to 15. The base of the hexadecimal number system is 16

Correct option: B
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Question 60
A
Roman Number System
B
Octal Number System
C
Binary Number System
D
Hexadecimal Number System
Explanation
The Roman number system isnt a positional number system since , it uses symbols to represent numbers. The octal number system uses digits from 0-7 , the binary number system uses digits from 0-1 whereas, the hexadecimal number system uses digits from 0-15.

Correct option: A

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