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Computer Science Quiz

Total questions: 52

Worksheet time: 26mins

Name
Class
Date
1.

Conversion of an octal number 123 to binary number is?

a)

1010011

b)

1110001

c)

1001001

d)

1101011

2.

The decimal equivalent of the binary number 1011001 is?

a)

89

b)

90

c)

91

d)

85

3.

The decimal equivalent of the binary number 100100 is?

a)

36

b)

37

c)

35

d)

34

4.

What is the number of bit patterns provided by a 7-bit code?

a)

128

b)

127

c)

64

d)

256

5.

Conversion of an octal number 44 to binary number is?

a)

100100

b)

100101

c)

100111

d)

110000

6.

Conversion of an octal number 47 to binary number is?

a)

100111

b)

101111

c)

101110

d)

111000

7.

What is the number of bit patterns provided by an 8-bit code?

a)

256

b)

255

c)

128

d)

512

8.

The decimal equivalent of the binary number 110101 is?

a)

53

b)

52

c)

54

d)

50

9.

Conversion of a hexadecimal number 2FB to binary number is?

a)

1011111011

b)

1011010101

c)

1001011111

d)

1011001111

10.

Conversion of a hexadecimal number BC to binary number is?

a)

10111100

b)

10011100

c)

11011100

d)

10110100

11.

The binary system uses powers of?

a)

2

b)

10

c)

8

d)

16

12.

Conversion of an octal number 20 to its binary number is?

a)

10000

b)

10001

c)

10010

d)

10011

13.

Conversion of an octal number 256 to binary number is?

a)

10101110

b)

10101101

c)

10111010

d)

10101010

14.

What is the highest binary number that can be referred to on a three-position jumper block?

a)

1

b)

10

c)

11

d)

111

15.

The binary equivalent of the octal number 13.54 is?

a)

1011.1011

b)

1010.1010

c)

1101.1011

d)

1110.1101

16.

Conversion of hexadecimal number 1D7F to a decimal number is?

a)

7551

b)

7549

c)

7531

d)

7520

17.

Conversion of a hexadecimal number 5BC to binary number is?

a)

10110111100

b)

10110110100

c)

10111011100

d)

10110111000

18.

The computer translates the condition of each switch to a number. What number is represented by the OFF state?

a)

0

b)

1

c)

-1

d)

2

19.

How many bits can be stored in the 8K RAM?

a)

65536 bits

b)

51200 bits

c)

1024 bits

d)

4096 bits

20.

The binary equivalent of the Hexadecimal number 7BD is?

a)

11110111101

b)

11111011001

c)

11111011111

d)

11110110101

21.

The computer translates the condition of each switch to a number. What number is represented by the ON state?

a)

1

b)

0

c)

-1

d)

2

22.

Conversion of a hexadecimal number 3D to binary number is?

a)

111101

b)

111100

c)

110111

d)

111011

23.

Conversion of an octal number 106 to binary number is?

a)

1000110

b)

1001001

c)

1010101

d)

1011010

24.

Conversion of an octal number 73 to binary number is?

a)

111011

b)

110110

c)

110101

d)

111101

25.

The decimal equivalent of the binary number 1010100 is?

a)

84

b)

85

c)

83

d)

82

26.

Conversion of a hexadecimal number D8 to binary number is?

a)

11011000

b)

11011100

c)

11101100

d)

11010110

27.

The octal equivalent of the number 10011.1101 is?

a)

116.54

b)

114.55

c)

115.56

d)

113.53

28.

Conversion of an octal number 74 to binary number is?

a)

111100

b)

111101

c)

111010

d)

110111

29.

The decimal equivalent of the binary number 101011 is?

a)

43

b)

42

c)

44

d)

45

30.

What type of user interface does use windows, icons, menus and pointers?

a)

GUI or WIMP

b)

Command-line interface

c)

Touchscreen interface

d)

Voice-based interface

31.

The basic data structure of the relational model is?

a)

both simple and complex

b)

Table

c)

Tree

d)

Graph

32.

In the range A1:A4, the values 1, 2, 3, 4 are entered in order. What will be the result in cell B1 if it specifies the formula "=MAX(A1:A4)"?

a)

4

b)

3

c)

2

d)

1

33.

What format of cells does not exist?

a)

Imaginary format or virtual format

b)

Number format

c)

Text format

d)

Date format

34.

Which is the type of local area network in which all microcomputers in the network communicate directly with one another without relying on a server?

a)

Peer-to-peer LAN

b)

Client-server LAN

c)

Hybrid LAN

d)

Wireless LAN

35.

Which of these is NOT a type of server?

a)

Browser

b)

RAM

c)

Client

d)

File Server

36.

Which of these best describes the regular telephone line that is used in most homes today?

a)

Twisted pair wire

b)

Coaxial cable

c)

Fiber optic cable

d)

Shielded twisted pair

37.

How do fiber-optic cables transmit data?

a)

Via pulsating beams of light

b)

Via electrical signals

c)

Via sound waves

d)

Via radio signals

38.

What is hardware and/or software that protects computers from intruders?

a)

Firewall

b)

Antivirus

c)

Proxy server

d)

Router

39.

Which attack slows down or crashes equipment and programs?

a)

Denial of Service (DoS)

b)

Phishing

c)

Spyware

d)

Ransomware

40.

Which option describes malicious code running on user devices?

a)

Virus, worm, or Trojan horse

b)

Spyware

c)

Adware

d)

Firewall

41.

What is the purpose of an IP address?

a)

It identifies the source and destination of data packets on a network

b)

It encrypts data for security

c)

It provides access to websites

d)

It stores data

42.

What is an advantage of the peer-to-peer network model?

a)

Ease of setup

b)

Centralized control

c)

High scalability

d)

Better security

43.

Short for electronic commerce, it is the business of buying and selling products online?

a)

E-commerce

b)

E-business

c)

E-marketing

d)

Online business

44.

What is a collection of files storing related data?

a)

Database

b)

Folder

c)

Table

d)

Spreadsheet

45.

Give an example of Database Management System?

a)

Oracle

b)

Excel

c)

Word

d)

PowerPoint

46.

What concepts don't relate to database?

a)

Folder

b)

Record

c)

Table

d)

Field

47.

What language is used to communicate with a database?

a)

Structured Query Language

b)

Python

c)

HTML

d)

C++

48.

A group of 8 bits taken as a single unit?

a)

Byte

b)

Bit

c)

Kilobyte

d)

Nibble

49.

What data query in SQL means to choose lines from tables?

a)

SELECT

b)

INSERT

c)

UPDATE

d)

DELETE

50.

What data query in SQL means to add a line to the table?

a)

INSERT

b)

SELECT

c)

UPDATE

d)

DELETE

51.

What is a system software for creating and managing databases?

a)

Database Management System

b)

Operating System

c)

File Management System

d)

Application Software

52.

What should the user do to select the information stored in the database?

a)

The user shall execute a request (query)

b)

Create a new table

c)

Delete existing data

d)

Backup the database

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