Page 123 - Computer Science V2.0 Class 11

C. Fill in the blanks.
1. The two ways to represent an algorithm are ____________ and ____________.
2. The sequence of instructions written in a programming language to solve a particular problem is called a ____________.
3. A _________________ looks like a code written in a programming language.
4. In a problem-solving cycle, the bugs are identified and removed during __________ phase.
D. Answer the following questions:
1. What do you mean by the term problem-solving cycle?
2. Write any three characteristics of an algorithm.
3. Write a pseudocode to read two numbers, multiply them and display the result.
4. Write a pseudocode that reads two numbers and find the larger of the two numbers.
5. Write pseudocode that will perform the following:
a. Input the marks of four subjects: Computer Science, Physics, Chemistry, and Mathematics out of 100
b. Calculate the aggregate marks
c. Calculate the percentage

6. Draw a flowchart to read two numbers from the user and find the greatest common divisor of the two numbers.
7. Write a pseudocode to check whether a number is prime or not.
8. Draw a flowchart to accept a number and check whether it is an Armstrong number or not. If a number has p
digits, then it is an Armstrong number if the sum of its digits raised to the power p is equal to the number itself.
4
4
4
4
For example, 9474 = 9 + 4 + 7 + 4 .
9. Write an algorithm to display the sum of the first 10 even numbers.
10. Write an algorithm to display the number of digits in a number.
11. Draw a flowchart to display the sum of digits of a number.
12. Match the following flowchart symbols functions:

Flowchart Symbols Functions

(i) Decision
a.

(ii) Start/Stop
b.

(iii) Process
c.

13. The following table shows the average monthly expenditure per person on items of consumption in rural India. For example,
Rice and wheat in rural areas at 25% means that for every 100 rupees spent, rupees 25 goes towards the purchase of rice
and wheat alone.

Items Rural
Rice and wheat 25.0
Pulses and their products 5.7

Milk and milk products 17.4
Vegetables and fruits 15.1
Meat, fish and eggs 6.3

Sugar 3.3
Salt and spices 10.8
Other food items 16.5
Total: All food 100

Problem Solving 109