Basic Concepts of Algorithms Quiz - CBSE Class 7 Computer Science

Free practice quiz: Basic Concepts of Algorithms (CBSE Class 7 Computer Science). 19 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This CBSE Class 7 Computer Science practice quiz has 19 multiple-choice questions on Basic Concepts of Algorithms, and 19 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. What is an algorithm?

   1. A type of computer virus
   2. A step-by-step procedure for solving a problem
   3. A hardware component of a computer
   4. A programming language
   Show answer

   Answer: B. A step-by-step procedure for solving a problem

   An algorithm is a clear and finite set of instructions to solve a problem or perform a task. It is essential in computer science as it outlines how to approach a problem.

2. What should come after identifying the problem in algorithm design?

   1. Implement the solution
   2. Write the code
   3. Create a flowchart
   4. Test the algorithm
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   Answer: C. Create a flowchart

   After identifying the problem, the next step is to visualize the process, which is often done through creating a flowchart or pseudocode. This helps in organizing thoughts before implementation.

3. What is the role of a conditional statement in an algorithm?

   1. To repeat actions
   2. To perform calculations
   3. To make decisions based on conditions
   4. To end the program
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   Answer: C. To make decisions based on conditions

   Conditional statements in algorithms allow the flow of execution to change based on whether a condition is true or false, which is crucial for decision-making processes.

4. What role does 'time complexity' play in an algorithm?

   1. It measures how long an algorithm takes to run
   2. It describes the amount of memory used
   3. It defines the number of steps
   4. It explains how to write the code
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   Answer: A. It measures how long an algorithm takes to run

   Time complexity refers to the computational complexity that describes the amount of time it takes to run an algorithm as a function of the length of the input. It provides insight into the efficiency of the algorithm.

5. What is the purpose of a 'loop' in an algorithm?

   1. To execute a block of code repeatedly
   2. To stop execution
   3. To create functions
   4. To declare variables
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   Answer: A. To execute a block of code repeatedly

   A loop in an algorithm allows a block of code to be executed multiple times based on a specified condition, making it possible to handle repetitive tasks efficiently.

More questions in this quiz

Answers and explanations are in the full quiz.

1. Which of the following is NOT an algorithm?
2. What is the first step in designing an algorithm?
3. What is pseudocode?
4. Why is testing an algorithm important?
5. Which of the following best describes a flowchart?
6. In algorithm design, what does 'iteration' refer to?
7. What type of algorithm guarantees finding the best solution?
8. Which of the following is an example of sorting an algorithm?
9. What does 'divide and conquer' refer to in algorithms?
10. Which is an example of an algorithm using recursion?
11. What does complexity analysis involve?
12. Which algorithm is known for its quick sorting ability?
13. In terms of algorithm efficiency, what does 'big O notation' represent?
14. What is a greedy algorithm?

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