UNIT 01: PROBLEM SOLVING AND ALGORTHM DESIGNING - Lab Activities - Computer Science For Class X

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Computer Science For Class X
Unit 01: Problem Solving And Algorithm Designing
LAB ACTIVITIES

1. Design an algorithm to find the greater number by taking two numbers as input.
Ans: Greater Number By Taking two numbers

• Step 1: Start
• Step 2: Declare variable num1 , num2 & result
• Step 3: Read num1 and num2
• Step 4: Check If numl>num2 then print "Result = Number 1 is greater"
  Else print "Result = Number 2 is greater"
• Step 5: Stop

OR

• Step 1: Start
• Step 2: Read a, b
• Step 3: If a > b then
  Display “A is the largest number”,
  otherwise
  Display “B is the largest number”,
• Step 4: Stop.

2) Design an algorithm to find area of a triangle.
Ans: Area Of A Triangle

• Step 1: Start
• Step 2: Declare variable Base, Height & Area of triangle
• Step 3: Read Base and Height
• Step 4: Use formula Area of triangle = (1/2)*Base*Height
• Step 5 : Display Area of triangle
• Step 6: Stop

OR

• Step 1: Start
• Step 2: Input base, height
• Step 3: Calculate area =  ½ * base * height
• Step 4: Display “Area of Triangle =“ area
• Step 5: Stop

3. Sort the following steps of the algorithm in correct order for baking a cake:
Step: Gather the ingredients
Step: End
Step: Grease a pan
Step: Preheat the oven
Step: Put the pan in the oven
Step: Start
Step: Pour the batter into the pan
Step: When the timer goes off, take the pan out of the oven
Step: Set a timer
Step: Mix together the ingredients to make the batter
Ans: Baking A Cake

• Step l: Start
• Step 2: Gather the ingredients
• Step 3: Mix together the ingredients to make the batter
• Step 4: Grease a pan
• Step 5: Pour the batter into the pan
• Step 6: Preheat the oven
• Step 7: Put the pan in the oven
• Step 8: Set a timer
• Step 9: When the timer goes off, take the pan out of the oven
• Step 10: End

4. Draw a flow chart to calculate gross salary by adding 20% house rent and 30% medical allowances in basic salary.
Ans: Gross Salary Flowchart

OR

5. Draw a flow charts for all the algorithms given in this unit.
Ans:

Algorithm 1: Making a cup of tea

• Step 1: Start
• Step 2: Place the fresh water in a pot or a kettle.
• Step 3: Boil the water.
• Step 4: Put the black tea leaves in that pot.
• Step 5: After that add some milk into that pot.
• Step 6: Add some sugar.
• Step 7: Boil for some time.
• Step 8: Stop

Flowchart 1: Making a cup of tea

Algorithm 2: Sum of two numbers

• Step 1: Start
• Step 2: Declare variables num1, num2 and sum.
• Step 3: Read values num1 and num2.
• Step 4: Add num1 and num2 and assign the result to sum.
  sum = num1 + num2
• Step 5: Display sum
• Step 6: Stop

Flowchart 2: Sum of two numbers

OR

Algorithm 3: Average of three numbers

• Step 1: Start
• Step 2: Declare variables num1, num2, num3 and avg.
• Step 3: Read values num1, num2 and num3.
• Step 4: Apply formula {Average = Sum / No. of values}
  avg = (num1 + num2 + num3) / 3
• Step 5: Display avg
• Step 6: Stop

Flowchart 3: Average of three numbers

OR

Algorithm 4: Volume of a box

• Step 1: Start
• Step 2: Declare variables length, width, height and volume.
• Step 3: Read values length, width and height.
• Step 4: Apply formula {Volume = length x width x height}
  volume = length x width x height
• Step 5: Display volume
• Step 6: Stop

Flowchart 4: Volume of a box

OR

Algorithm 5: Percent Calculate

• Step 1: Start
• Step 2: Declare variables part, total and percentage.
• Step 3: Read values part and total.
• Step 4: Apply formula {Percentage = (part / total) x 100}
  percentage = (part / total) x 100
• Step 5: Display percentage
• Step 6: Stop

Flowchart 5: Percent Calculate

OR

6. Draw the following structure
a. Tree with six nodes.
b. Graph with five nodes.
Ans: TREE WITH SIX NODES:

OR

GRAPH WITH FIVE NODES

OR