# CSC 100 | Study Mode

Question 61
A
2
B
8
C
10
D
1
##### Explanation
In a binary number system, the value of base or radix is 2. The binary system uses only two digits for the representation of numbers, therefore its base id chosen to be 2.

Question 62
A
10
B
10
C
1010
D
10
##### Explanation
To get the binary equivalent of any number, we need to divide the number by 2 and obtain the remainders as : We then write the remainders in the reverse order as 1010 .

Question 63
A
machine language
B
C
C
C#
D
pascal
##### Explanation
Machine Language is written in binary codes only . It can be easily understood by the computer and is very difficult for us to understand. A machine language , unlike other languages requires no translators or interpreters.

Question 64
A
624.12
B
145.12
C
154.12
D
145.21
##### Explanation
The octal equivalent is obtained by grouping the numbers into three, from right to left before decimal and from right to left after the decimal place. Here, i.e. 145.12 is the octal equivalent of the number.

Question 65
A
111
B
E
C
15
D
14
##### Explanation
In hexadecimal number system, 1110 = 15, which is represented by the alphabet E. Some representations are: A 10
B 11
C 12
D 13
E 14
F 15.

Question 66
A
True
B
False
##### Explanation
A bit stands for a binary digit. A binary digit can have only two digits i.e. 0 or 1. A binary number consisting of n-bits is called a n-bit number.

Question 67
A
21
B
12
C
22
D
31
##### Explanation
To convert a binary number to its decimal equivalent follow these steps : 24 * 1 + 23 * 0 + 22 *1 + 21 * 0 + 20 * 1 = 21. Therefore, the answer is 21.

Question 68
A
1111
B
101
C
11E
D
0
##### Explanation
A binary number can have only two possible digits, 0 and 1. In the third option, there is an alphabet E present which makes it an invalid binary number. Alphabets are only allowed in hexadecimal number system.

Question 69
A
(124)2
B
1110
C
(110)2
D
(000)2
##### Explanation
The binary numbers should comprise only two digits 0 and 1. Also, for the base, the value should be 2 and it should be written as a subscript enclosing the entire number. Here, the fourth option gives the correct representation

Question 70
A
Synchronous Software
B
Package Software
C
Application Software
D
System Software
##### Explanation
Software refers to a collection of programs. Softwares designed to do a specific task are referred to as the application softwares. Eg. :Inventory management, banking, etc.

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