Computer Science questions and answers

Computer Science Questions and Answers

Challenge your competence level in computers, computing, algorithms, hardware and software with these Computer science questions and answers.

11.

The computer that combines the functions of both analog and digital computers is called ?

A.

Digital computer

B.

Analog computer

C.

Hybrid computer

D.

multipurpose computer

Correct answer is C

A hybrid computer is a type of computer that combines the characteristics of both digital and analog computers. It is designed to offer the speed of analog equipment and the accuracy and memory of digital equipment

12.

Computers manipulate data in many ways, and this manipulation is called ?

A.

batching

B.

utilizing

C.

processing

D.

upgrading

Correct answer is C

Computers manipulate data in many ways, and this manipulation is called processing. Data processing refers to the conversion of raw data into meaningful output by performing computations, logical comparisons, and other operations

13.

Which of the following monitors has only two colours

A.

colour monitor

B.

colour graphic adapter (CGA)

C.

dichrome monitor

D.

monochrome monitor

Correct answer is D

A monochrome monitor is a type of CRT computer monitor which was very common in the early days of computing, from the 1960s through the 1980s, before color monitors became popular. They are designed to display one color of information (usually green, amber, or white) along with a different color background (usually black). Therefore, the correct answer is 'monochrome monitor

14.

which communication channel allows the sending of information in one direction only?

A.

simplex mode

B.

half duplex mode

C.

duplex mode

D.

full duplex mode

Correct answer is A

simplex mode allows the sending of information in one direction only, which is similar to a one-way street

15.

Which of the following is an example of graphics software ?

A.

Microsoft word

B.

Adobe Illustrator

C.

Microsoft powerpoint

D.

MS Access

Correct answer is B

Adobe Illustrator is a vector graphics editor and design program developed and marketed by Adobe Inc. It is an example of graphics software, which is used to create, edit, and manipulate visual images

16.

___ is the type of computer that is designed to operate on two states, 0 and 1

A.

Analog computer

B.

Hybrid computer

C.

Digital computer

D.

micro computer

Correct answer is C

A digital computer is a type of computer that operates on digital data, which is represented in binary form (0 and 1). These computers perform calculations using binary digits and can process both numerical and non-numerical data

17.

The term used to describe when new information replaces old information or data is

A.

file loss

B.

delete

C.

re-write

D.

overwrite

Correct answer is D

In computing, when new information replaces old information or data, it is referred to as 'overwrite'. This is because the new data is written over the old data, effectively replacing it. Therefore, the correct answer is 'overwrite

18.

Which of these programming languages is the most suitable for a business data processing?

A.

BASIC

B.

ALGOL

C.

COBOL

D.

FORTRAN

Correct answer is C

COBOL (Common Business-Oriented Language) is the most suitable for business data processing. It was specifically designed for business data processing needs such as arithmetic operations, file handling, and record management. BASIC and FORTRAN are more suited for educational and scientific computations respectively, while ALGOL is more for algorithmic representation

19.

The process where a programmer converts a program specifications into computer instructions is called ?

A.

Debugging

B.

Coding

C.

Testing

D.

System design

Correct answer is B

The process where a programmer converts a program specifications into computer instructions is called Coding. Testing is the process of checking the functionality of the program, System design is the process of defining the architecture, components, modules, interfaces, and data for a system to satisfy specified requirements, and Debugging is the process of finding and resolving defects or problems within a computer program

20.

The diagrammatic representation of an algorithm is

A.

pseudocodes

B.

codes

C.

graphics

D.

flowchart

Correct answer is D

The diagrammatic representation of an algorithm is a flowchart. A flowchart is a type of diagram that represents an algorithm, workflow or process, showing the steps as boxes of various kinds, and their order by connecting them with arrows


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