computer MCQs - 9th class Chapter 07 Mcqs

1

Which of the following best describes computational thinking?

A

A problem-solving approach that employs systematic, algorithmic, and logical thinking.

B

A method of solving problems using mathematical calculations only.

C

A technique used exclusively in computer programming.

D

An approach that ignores real-world applications.

2

What is decomposition in computational thinking?

A

It simplifies problems by breaking them down into smaller, more manageable parts.

B

It complicates problems by adding more details.

C

It eliminates the need for solving the problem.

D

It is only useful for simple problems.

3

What does pattern recognition involve?

A

Finding and using similarities within problems.

B

Ignoring repetitive elements.

C

Breaking problems into smaller pieces.

D

Writing algorithms.

4

Which term refers to the process of ignoring irrelevant details to focus on the main idea?

A

Abstraction

B

Decomposition

C

Pattern recognition

D

Algorithm design

5

What is a fundamental principle of computational thinking?

A

Problem simplification

B

Ignoring problem understanding

C

Avoiding solution design

D

Implementing random solutions

6

What is an algorithm?

A

Step-by-step instructions for solving a problem.

B

Graphical representations.

C

Lists of data.

D

Repetitive patterns.

7

According to computational thinking, what is the first step in problem-solving?

A

Understanding the problem

B

Writing the solution

C

Designing a flowchart

D

Selecting a solution

8

What are flowcharts used for?

A

Representing algorithms graphically.

B

Coding a program.

C

Solving mathematical equations.

D

Identifying patterns.

9

What is pseudocode?

A

A high-level description of an algorithm using plain language.

B

A type of flowchart.

C

A programming language.

D

A debugging tool.

10

What does dry running a flowchart involve?

A

Testing the flowchart with sample data manually.

B

Writing the code in a programming language.

C

Converting the flowchart into pseudocode.

D

Ignoring the flowchart details.

11

Which of these is a key component of computational thinking?

A

Decomposition

B

Compilation

C

Execution

D

Integration

12

An algorithm is similar to what everyday example?

A

Following a recipe to bake a cake

B

Watching a movie

C

Reading a novel

D

Listening to music

13

What does LARP stand for?

A

Logic of Algorithms for Resolution of Problems

B

Logic and Resolution Programming

C

Logical Algorithm Resolution Practice

D

Language for Algorithm Resolution

14

What type of error occurs if you try to perform an impossible operation, such as dividing by zero?

A

Runtime Error

B

Syntax Error

C

Logical Error

D

Compilation Error

15

What is the primary purpose of abstraction?

A

To simplify complex problems by focusing on essential details.

B

To make a problem more complex.

C

To create a visual representation of the problem.

D

To find every possible error.

16

In a flowchart, what symbol is used to represent a decision point?

A

Diamond

B

Rectangle

C

Oval

D

Parallelogram

17

What does the rectangle symbol in a flowchart represent?

A

A process, task, or operation

B

The start or end of a process

C

A decision point

D

Data input or output

18

What does a parallelogram symbol in a flowchart represent?

A

Data input or output

B

A process or task

C

A decision point

D

The start or end

19

What is the main goal of debugging?

A

To find and fix errors in an algorithm or flowchart

B

To write an algorithm from scratch

C

To simplify a complex problem

D

To execute the code faster

20

Time complexity is a measure of what?

A

How fast or slow an algorithm performs as input size increases

B

The amount of memory an algorithm uses

C

The number of symbols in a flowchart

D

The clarity of pseudocode

21

What does space complexity measure?

A

The amount of memory an algorithm uses relative to input size

B

The time an algorithm takes to run

C

The number of steps in an algorithm

D

The number of errors in the code

22

A manual walk-through of an algorithm with sample data is called a?

A

Dry run

B

Simulation

C

Execution

D

Compilation

23

Using computer programs to model a real-world process is known as?

A

Simulation

B

Decomposition

C

Abstraction

D

Dry run

24

Which error is the hardest to find because the algorithm runs but produces incorrect results?

A

Logical Error

B

Syntax Error

C

Runtime Error

D

System Error

25

What is the first standardized flowchart symbols' development year?

A

1947

B

1957

C

1967

D

1977

26

The term 'debugging' originated from what?

A

An actual bug (a moth) found in an early computer

B

A software tool named 'Debugger'

C

A famous computer scientist named Deb Ug

D

A book about computer errors

27

What does the Oval symbol in a flowchart represent?

A

The start or end of a process

B

A decision

C

Input/Output

D

A process

28

Which of the following helps in understanding the logic of an algorithm without worrying about specific syntax?

A

Pseudocode

B

Flowchart

C

Compiler

D

Debugger

29

Breaking down the task of 'building a birdhouse' into smaller tasks is an example of what?

A

Decomposition

B

Pattern Recognition

C

Abstraction

D

Simulation

30

Identifying that the area of any square is the side length multiplied by itself is an example of?

A

Pattern Recognition

B

Decomposition

C

Abstraction

D

Debugging

31

Hiding complex details to focus on high-level steps, like in a recipe for tea, is an example of?

A

Abstraction

B

Algorithm

C

Pattern Recognition

D

Decomposition

32

What is the purpose of an 'IF...THEN...ELSE' statement in an algorithm?

A

To handle decision-making processes

B

To repeat a set of instructions

C

To read input from a user

D

To display output

33

In the LARP software, what does an 'Undefined Variable' error message indicate?

A

You are using a variable that hasn't been defined yet

B

You forgot to include an important step

C

You are trying to perform an invalid operation

D

There is a logical mistake in your algorithm

34

Big O notation, like O(n²), is used to express what?

A

Time complexity

B

Space complexity

C

The number of variables

D

The algorithm's accuracy

35

The login system flowchart in the book locks the account after how many failed attempts?

A

Five

B

Three

C

Four

D

Six

36

In the shop order flowchart, what is the first decision made after getting an order?

A

If the item is available

B

If the customer pays

C

If the customer rating is high

D

If the item can be packed

37

A prime number is a natural number greater than 1 that has no positive divisors other than...?

A

1 and itself

B

1 and 2

C

Only 2

D

Any even number

38

The pseudocode to check if a number is even uses what mathematical operator?

A

Modulo (%)

B

Addition (+)

C

Division (/)

D

Multiplication (*)

39

What is a key benefit of simulation?

A

It allows testing in a safe environment without real-world risk

B

It always gives a perfectly accurate result

C

It is faster than any other method

D

It requires no input data

40

Which of these is NOT a debugging technique mentioned in the text?

A

Consulting a colleague

B

Trace the Steps

C

Use Comments

D

Simplify the Problem

41

In the context of problem-solving, what did Albert Einstein suggest spending most of the time on?

A

Thinking about the problem

B

Thinking about the solutions

C

Writing the code

D

Testing the final product

42

Flowcharts and pseudocode are both tools used to do what?

A

Describe algorithms

B

Write executable code

C

Compile programs

D

Debug hardware

43

In the pseudocode example for checking credentials, what is the first thing the procedure checks?

A

if the username is valid

B

if the password is valid

C

if the user exists

D

if the system is online

44

What is the primary function of the arrows (Flowlines) in a flowchart?

A

To show the direction of flow and connect symbols

B

To represent calculations

C

To indicate the start

D

To store data

45

Which principle involves evaluating different approaches and selecting the most efficient one?

A

Solution Selection and Design

B

Problem Understanding

C

Problem Simplification

D

Decomposition

46

Meteorologists using computer models to predict weather is an example of what?

A

Simulation

B

Dry run

C

Abstraction

D

Decomposition

47

When drawing flowcharts in LARP, what do diamonds represent?

A

Decisions

B

Processes

C

Input/Output

D

Start/End

48

Which is a benefit of using pseudocode for planning?

A

It helps in understanding the logic without worrying about syntax.

B

It can be executed directly by the computer.

C

It provides a visual map of the process.

D

It automatically finds all logical errors.

49

The first step in dry running the flowchart for adding two numbers is?

A

Start

B

Input the first number

C

Add the two numbers

D

Display Sum

50

What is the output of the 'FindMax' pseudocode if the inputs are num1=10 and num2=15?

A

15

B

10

C

False

D

Error