Class 8 Computer Science Notes, Unit 3: Algorithm Thinking and Problem Solving -- Exercise Short Response and Miscellaneous (within the chapter) Questions and Answers.

Class 8 Computer Science Notes for 8th Centralized Exam 2023 
and onward, FDE, Islamabad 

Unit-3 

"Algorithm Thinking and Problem Solving"

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Class 8 Computer Science MCQs (All Units Exercise) 

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1. Exercise Short Response Questions and Answers:

Q1. Explain the feature of the information processing model.

Ans:

A computer is a problem-solving machine. The main features of the Computer process model are Input, Processor, output, and Memory.

Input is data that we enter with the help of input devices like a keyboard, mouse, scanner, etc. while the processor process data, and output are the processed data or information. While data and information are stored in a memory location.

Q2. Demonstrate the main steps to solve the problem.

Ans:

To solve a problem, we follow the following steps

1. Understand the problem
2. Formulate the model
3. Develop an algorithm
4. Write the program
5. Test the program
6. Evaluate the solution

Q3. How Nested loops are useful in arranging a calendar?

Ans:

Nested loops are important in arranging a calendar because the year consists of months (outer loop), months consist of weeks (inner loop) and further months consist of seven days (sub-inner loop).

Q4. Differentiate between the scope and limitation of the problem.

Ans:

The scope defines the boundaries of what a solution must provide to meet the requirements, where the limitation of the problem refers to the aspects that are beyond the study/implementation of the problem.

2. Miscellaneous Questions and Answers (Within the Unit):

Q.1.  Define the Problem-solving.

Ans:

The process of analyzing some particular situation and behaving accordingly in order to generate some response.

Q2. Write an algorithm that allows a user to check whether the input is even or odd.

Ans: 

Algorithm to find whether the input is even or odd.

Line 0 Start
Line 1 Take input (any number)
Line 2 IF number mod 2=0
Lien 3 It is an even number
Line 4 Else
Line 5 It is an odd number
Line 6 End

Q3. Define Program.

Ans: 

A program is a set of instructions that are written in a programming language to solve a problem.

Q4. Define Pseudo code.

Ans: 

“Pseudo code” is helpful for programmers to interpret the algorithm in any programming language of the programmer’s choice. Pseudocode is pronounced by keeping the first character ‘P’ silent and breaking the reaming word into two parts so ‘pseudo’ and ‘code’.

Q5.  Define Algorithm.

Ans:

The algorithm is the step-by-step procedure to solve a problem. We can write it in any general language.

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