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MCQs — Computational Thinking & Algorithms

Practice questions for Computer Science.

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Question 81

Which design method uses graphical symbols connected by arrows?

A. Pseudocode

B. Flowchart

C. Algorithm written in sentences

D. Program code

Question 82

Which design method describes the steps using short, English-like statements?

A. Flowchart

B. Concept map

C. Pseudocode

D. Machine code

Question 83

Why is a design method used before writing the program?

A. To avoid writing the program

B. To make the computer faster

C. To replace testing

D. To plan and check the logic of the solution before coding

Question 84

How does a flowchart differ from pseudocode?

A. A flowchart uses symbols and arrows, while pseudocode uses short text statements

B. A flowchart is made only of text, while pseudocode is a diagram

C. Both are programming languages

D. Both must be written on a computer

Question 85

A group needs to see at a glance how a solution branches into yes and no decisions. Which method suits best?

A. Flowchart

B. Program code

C. Table of contents

D. Pseudocode without indentation

Question 86

Ali writes numbered steps in ordinary English: 1. Input two numbers, 2. Add them, 3. Display the sum. Which design method has he used?

A. Flowchart

B. Algorithm

C. Pseudocode

D. Concept map

Question 87

Can pseudocode be run directly on a computer?

A. Yes, all computers understand it

B. No, it must be converted into program code first

C. Yes, but only on mobile phones

D. No, because it has no steps

Question 88

Which flowchart symbol is used to show Start and End?

A. Oval

B. Rectangle

C. Diamond

D. Parallelogram

Question 89

Which flowchart symbol is used for input and output?

A. Diamond

B. Parallelogram

C. Oval

D. Rectangle

Question 90

Which flowchart symbol is used for a process such as a calculation?

A. Oval

B. Diamond

C. Rectangle

D. Parallelogram

Question 91

Which flowchart symbol is used to show a decision?

A. Rectangle

B. Oval

C. Parallelogram

D. Diamond

Question 92

What is a flowchart?

A. A graphical representation of an algorithm using symbols

B. A list of programming errors

C. A table of input data

D. A type of computer program

Question 93

Why does a decision symbol have two exits?

A. One exit is for input and one for output

B. There are two possible answers, such as Yes and No

C. One exit is for starting and one for ending

D. It repeats every step twice

Question 94

Which is a rule for drawing a flowchart?

A. It should begin with a Start symbol and finish with an End symbol

B. Arrows can be left out

C. Symbols can be placed in any order

D. A decision symbol must have only one exit

Question 95

What do the arrows in a flowchart show?

A. The colour of the symbols

B. The direction of the flow of steps

C. The number of inputs

D. The name of the programmer

Question 96

In a flowchart that checks whether a number is positive, which symbol should contain the text 'Is the number greater than 0?'

A. Diamond

B. Rectangle

C. Oval

D. Parallelogram

Question 97

A flowchart reads the radius, calculates the area and displays it. Which is the correct order of symbols after Start?

A. Rectangle, parallelogram, parallelogram

B. Parallelogram, rectangle, parallelogram

C. Diamond, rectangle, parallelogram

D. Parallelogram, diamond, rectangle

Question 98

A flowchart runs: Start, input A, input B, Sum = A + B, print Sum, End. What is printed if A = 7 and B = 5?

A. 2

B. 35

C. 12

D. 75

Question 99

A flowchart runs: Start, input N, 'Is N greater than 10?' If Yes print Big, if No print Small, End. What is printed if N = 8?

A. Big

B. 8

C. Nothing is printed

D. Small

Question 100

A flowchart sets Count = 1. While Count is 3 or less, it prints Count and adds 1 to Count. What is printed?

A. 1, 2, 3

B. 1, 2, 3, 4

C. 2, 3, 4

D. 1, 2

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