Explore topic-wise MCQs in Computer Science.

This section includes 93 Mcqs, each offering curated multiple-choice questions to sharpen your Computer Science knowledge and support exam preparation. Choose a topic below to get started.

51.

One byte equals to how many bits ?

A. 4 bits
B. 8 bits
C. 12 bits
D. 16 bits
Answer» C. 12 bits
Discussion
52.

The normalized representation of 0.0010110 * 2 ^ 9 is

A. 0 10001000 0010110
B. 0 10000101 0110
C. 0 10101010 1110
D. 0 11110100 11100
Answer» C. 0 10101010 1110
Discussion
53.

In double precision format the size of the mantissa is ______.

A. 32 bit
B. 52 bit
C. 64 bit
D. 72 bit
Answer» C. 64 bit
Discussion
54.

In 32 bit representation the scale factor as a range of ________.

A. -128 to 127
B. -256 to 255
C. 0 to 255
D. None of the above
Answer» B. -256 to 255
Discussion
55.

ASCII stands for [IBPS Clerk 2011,2014]

A. American Special Computer for Information Interaction
B. American Standard Computer for Information Interchange
C. American Special Code for Information Interchange
D. American Special Computer for Information Interchange
E. American Standard Code for Information Interchange
Answer» F.
Discussion
56.

Computer uses the ......... number system to store data and perform calculations [IBPS Clerk 2013]

A. binary
B. octal
C. decimal
D. hexadecimal
E. None of these
Answer» B. octal
Discussion
57.

Conversion of decimal number \[{{(61)}_{10}}\] to its binary number equivalent is  [IBPS Clerk 2012]

A. \[{{\left( 110011 \right)}_{2~}}\]
B. \[{{\left( 11001110 \right)}_{2}}\]
C. \[{{\left( 111101 \right)}_{2~}}\]
D. \[{{\left( 11111 \right)}_{2}}~\]
E. None of these
Answer» D. \[{{\left( 11111 \right)}_{2}}~\]
Discussion
58.

Which of the following is not a binary number?  [IBPS Clerk 2011]

A. 1
B. 101
C. 202
D. 110
E. 11
Answer» D. 110
Discussion
59.

Which of the following is an example of binary number? [IBPS Clerk 2011]

A. 6AH1
B. 100101
C. 5
D. ABCD
E. 23456
Answer» C. 5
Discussion
60.

What type of information system would be recognised by digital circuits?

A. Hexadecimal system
B. Binary system
C. Both a and b
D. Only roman system
E. None of the above
Answer» D. Only roman system
Discussion
61.

In EBCDIC code, maximum possible characters set size is

A. 356
B. 756
C. 556
D. 256
E. 156
Answer» E. 156
Discussion
62.

Code 'EBCDIC' that is used in computing stands for

A. Extension of BCD information code
B. Extended of BCD interchange code
C. Extension of BCD interchange conduct
D. Extended BCD information conduct
E. None of the above
Answer» C. Extension of BCD interchange conduct
Discussion
63.

Conversion of decimal number \[{{\left( 15 \right)}_{10}}\]to hexadecimal number is

A. \[{{\left( 14 \right)}_{16}}\]
B. \[{{\left( 13 \right)}_{16}}\]
C. \[{{\left( F \right)}_{16}}\]
D. \[{{\left( 7F \right)}_{16}}\]
E. \[\left( F{{F}_{6}} \right)\]
Answer» D. \[{{\left( 7F \right)}_{16}}\]
Discussion
64.

To convert binary number to decimal, multiply the all binary digits by power of

A. 0
B. 2
C. 4
D. 6
E. 8
Answer» C. 4
Discussion
65.

Numbers that are written with base 10 are classified as

A. decimal number
B. whole number
C. hexadecimal number
D. exponential integers
E. Mantissa
Answer» B. whole number
Discussion
66.

Conversion of decimal number \[{{(93)}_{10}}\]to hexadecimal number is

A. \[{{(2D)}_{16}}\]
B. \[{{(5D)}_{16}}\]
C. \[{{(62)}_{16}}\]
D. \[{{(31)}_{16}}\]
E. None of these
Answer» C. \[{{(62)}_{16}}\]
Discussion
67.

Determine the octal equivalent of \[{{(432267)}_{10}}\]

A. \[{{\left( 432267 \right)}_{8}}\]
B. \[{{\left( 346731 \right)}_{8}}\]
C. \[{{\left( 2164432 \right)}_{8}}~\]
D. \[{{\left( 123401 \right)}_{8}}~\]
E. None of these
Answer» F.
Discussion
68.

Most commonly used codes for representing bits are

A. ASCII
B. BCD
C. EBCDIC
D. All of these
E. None of these
Answer» E. None of these
Discussion
69.

Conversion of decimal number \[{{(42)}_{10}}\]to its octal number equivalent is

A. \[{{(57)}_{8}}\]
B. \[{{(42)}_{8}}\]
C. \[{{(47)}_{8}}\]
D. \[{{(52)}_{8}}\]
E. None of these
Answer» E. None of these
Discussion
70.

Hexadecimal number system has .......... base.

A. 2
B. 8
C. 10
D. 16
E. None of these
Answer» E. None of these
Discussion
71.

Decimal number system is the group of ............ numbers.

A. 0 or 1
B. 0 to 9
C. 0 to 7
D. 0 to 9 and A to F
E. None of these
Answer» C. 0 to 7
Discussion
72.

A hexadecimal number is represented by

A. three digits
B. four binary digits
C. four digits
D. All of these
E. None of these
Answer» C. four digits
Discussion
73.

Binary system is also called

A. base one system
B. base two system
C. base system
D. binary system
E. None of these
Answer» C. base system
Discussion
74.

MSD refers as

A. Most Significant Digit
B. Many Significant Digit
C. Multiple Significant Digit
D. Most Significant Decimal
E. None of the above
Answer» B. Many Significant Digit
Discussion
75.

The coding system allows non-English characters and special characters to be represented

A. ASCII
B. UNICODE
C. EBCDIC
D. All of these
E. None of these
Answer» C. EBCDIC
Discussion
76.

Which of the following is invalid hexadecimal number?

A. AOXB
B. A0F6
C. 4568
D. ACDB
E. 60AC
Answer» B. A0F6
Discussion
77.

Which of the following is an octal number equal to decimal number\[{{\left( 896 \right)}_{10}}\]?

A. 61
B. 6001
C. 1006
D. 1600
E. 601
Answer» E. 601
Discussion
78.

Which of the following is a binary number equivalent to octal number (.431)8?

A. \[{{\left( 100011001 \right)}_{2}}~\]
B. \[{{\left( .100011001 \right)}_{2}}\]
C. \[{{\left( 100110100 \right)}_{2}}\]
D. \[{{\left( .100110001 \right)}_{2}}\]
E. \[{{\left( 1000.11001 \right)}_{2}}\]
Answer» C. \[{{\left( 100110100 \right)}_{2}}\]
Discussion
79.

One thousand bytes is a......... [Allahabad Bank Clerk 2011]

A. Kilobyte
B. megabyte
C. Gigabyte
D. Terabyte
E. None of these
Answer» B. megabyte
Discussion
80.

Information on a computer is stored as what? [Allahabad Bank Clerk 2011]

A. Analog data
B. Digital data
C. Modem data
D. Watts data
E. None of these
Answer» C. Modem data
Discussion
81.

The computer abbreviation KB usually means. [Allahabad Bank Clerk 2011]

A. Key Block
B. Kernel Boot
C. Kilo Byte
D. Kit Bit
E. None of these
Answer» D. Kit Bit
Discussion
82.

Information on a computer is stored as.... [Allahabad Bank Clerk 2010]

A. Analog data
B. digital data
C. Modem data
D. watts data
E. None of these
Answer» C. Modem data
Discussion
83.

Computers use the.............System to process data.

A. Processing
B. kilobyte
C. Binary
D. representational
E. None of these
Answer» D. representational
Discussion
84.

A computer works on a ................ number system. [Syndicate Bank 2010]

A. Binary
B. octal
C. Decimal
D. hexadecimal
E. None of these
Answer» B. octal
Discussion
85.

.............. Is approximately one billion bytes.

A. Kilobyte
B. Bit
C. Gigabyte
D. Megabyte
E. None of these
Answer» D. Megabyte
Discussion
86.

The time bit is short for..............  [SBI 2008]

A. Megabyte
B. Binary language
C. Binary digit
D. Binary number
E. None of these
Answer» D. Binary number
Discussion
87.

The largest unit of storage is..................

A. GB
B. KB
C. MB
D. TB
E. None of these
Answer» E. None of these
Discussion
88.

..............measures in megabyte.

A. Intensity of earthquake
B. Capacity of power
C. Memory capacity of computers
D. None of these
Answer» D. None of these
Discussion
89.

What is logic gate?

A. A software
B. A type of circuit
C. A special CD
D. A computer game
E. None of these
Answer» C. A special CD
Discussion
90.

1001, Series of four bits is called....................

A. Byte
B. Nibble
C. Bit
D. Input
E. None of these
Answer» C. Bit
Discussion
91.

The length of any word in a computer is measured in.............

A. Byte
B. Millimeter
C. Meter
D. Bits
E. None of these
Answer» E. None of these
Discussion
92.

........shows 'off' state of current in binary code.

A. 1
B. 0
C. 3
D. 2
E. 5
Answer» C. 3
Discussion
93.

Group of eight bits 10010110 or 01100101 is called...................

A. Nibble
B. Byte
C. Bit
D. Robot
E. None of these
Answer» C. Bit
Discussion