CBSE Coding Class 7 Solution Student Handbook Chapter 2 Sequencing with Block Coding

CBSE Coding Class 7 Solution – Sequencing with Block Coding

CBSE Coding Class 7 Solution Student Handbook Chapter 2 Sequencing with Block Coding all Questions and Answers Solution by Coding Teacher. Net Ex. Here provided all Coding Solution for Class 7.

1.) What is a bug in programming?

Answer: A feature in a program that generates incorrect output.

Reason: Any deviation in the expected and actual output of the program is known as a bug.

2.) What is sequencing in programming?

Answer: A programming structure, where steps are performed in an order.

Reason: Sequencing refers to the specific order in which we need to perform the activities in order to get the desired output.

3.) What is looping in programming?

Answer: A programming structure that repeats itself until a condition is met.

Reason: A loop is an algorithm which executes a block of code multiple times till the time a specified condition is met.

4.) What is selection in programming?

Answer: A list of instructions where there is a choice based on a condition

Reason: Selection refers to the situation in which the algorithm needs to make a choice between two or more alternatives.

5.) What is iteration in programming?

Answer: A list of instructions where there is a choice based on a condition.

Reason: The iteration can also be set to run for a specific number of times.

Standard Questions

1.) Explain what an algorithm is with the help of an example.

Answer: Algorithm is a step-by-step process to solve a problem. An algorithm is a sequence of instructions that act on some input data to produce some output in a finite number of steps. There are three basic building blocks that can be used when designing algorithms:

  • Sequencing
  • Selection
  • Iteration

For example: Algorithm for adding 2 numbers Step 1. Start

Step 2. Read num1 and num2

Step 3. Result = num1 + num 2

Step 4. Print Result

Step 5. Stop

2.) Explain a bug in any program/application that you have encountered in real life.

Answer: A bug is a failure in program that produces incorrect results. It’s an error that prevents the program from functioning as per the desired expectations. Any deviation in the expected and actual output of the program is known as a bug.

For example:

You create a boat which is expected to sail in ocean. Now when the boat is ready and you try to sail it in the water, you realize that there is a small hole in the bottom on the boat from where water is seeping in.

This water seeping in the boat at a slow speed may create a problem for the boat in the long run. Thus, this hole in the bottom of the boat can be termed as a “bug” in programming.

3.) Explain if sequencing, selection and iteration can be used together? Support your answer with a proper explanation.

Answer:

A sequence is a series of steps that runs in a predefined order. In sequence all steps execute exactly at once.

Selection refers to the situation in which the algorithm needs to make a choice between two or more alternatives.

Iteration refers to the process of doing the same task over and repeatedly, until a certain task is complete, or a certain condition is met. The iteration can also be set to run for a specific number of times.

Sequence, Selection, and Iteration all can be used together in the same program.

For example: Using sequencing with loops and conditionals we can create a program to get the sum of all even numbers till 50.

Start

Declare a variable sum = 0.

Run a loop from 1 to 50.

Check if number % 2 == 0, If True

Then, add the number in sum variable

Display the sum at the end of the program

Stop

4.) Explain three examples where you can apply loop and conditionals to simplify sequencing

Answer: Examples of applying loop and conditionals to simplify sequencing:

1.) For Finding all natural numbers between from 1 to 100.

Steps:

1.) Start

2.) Start loop from 1 to 100.

3.) Check it the number is natural or not, if yes print the number else move to next number.

4.) Check if the loop reaches 100, if yes Stop else go back to step 3.

5.) Stop

2.) For Distributing Chocolates in a birthday Party.

Steps:

1.) Start

2.) Take one chocolate from the bag.

3.) Give chocolate to the students.

4.) check if there are any students left who did not get the chocolates, if yes then go to step 2

5.) Stop

3.) To find the sum of all even numbers from 1 to 100.

Steps:

1.) Start

2.) Declare a variable sum = 0.

3.) Run a loop from 1 to 100.

4.) Check if number % 2 == 0, If True

5.) Then, add the number in sum variable

6.) Display the sum at the end of the program

7.) Stop

Higher Order Thinking Skills (HOTS)

1.) Write an algorithm to print cube of numbers from 1 to 10.

Answer:

2.) Draw a flowchart to explain the iterative process that Arun followed while distributing birthday sweets.

Answer:

Applied Project

1.) Create a rectangle of length 5 and height 3 using a loop (repeat block) in Minecraft.

Answer:

Updated: March 2, 2022 — 4:46 pm

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