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.

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
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   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.

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