Solved Exercise:
Class-6th
Chapter-6 Algorithms and Flowcharts
A. Multiple choice questions:
1. How many steps are there to write a program on computer?
a. two b. three c. four d. five
Answer: three
2. Graphical representation of an algorithm is called:
a. procedure b. graph c. flowchart d. chart
Answer: flowchart
3. It is a step-by-step procedure to solve any problem.
a. flowchart b. algorithm c. instruction d. perimeter
Answer: algorithm
4. Which shape is used for the processing box?
a. rectangle b. square c. circle d. star
Answer: rectangle
5. These lines indicate the control of flow of instructions in a flowchart.
a. control lines b. flow lines c. display lines d. print lines
Answer: flow lines
B. Write 'T' for true and 'F' for false statements:
1. A flowchart uses some complex symbols.
Answer: T
2. A flowchart is drawn after writing the algorithm.
Answer: T
3. A computer can only understand the instructions given in its language.
Answer: T
4. The arrows in a flowchart are known as line segment.
Answer: T
5. Algorithms are difficult to understand and implement.
Answer: F
6. A flowchart always begins with the start symbol and ends with the stop symbol.
Answer: T
C. Fill in the blanks:
1. The rectangle-shaped symbol in a flowchart is known as ________.
Answer: processing box
2. A flowchart is a _______ representation of an algorithm.
Answer: graphical
3. With the help of __________ problem can be analyzed in more effective way.
Answer: flowchart
4. ________ is used to connect tile various sections of a flowchart to maintain its linear flow.
Answer: Connector
5. Flowchart is ___________ of any programming language.
Answer: independent
D. Match the following:
Column A Column B
1. Processing box a. circle
2. Decision box b. rectangle
3. Input/Output box c. arrow
4. Connector d. diamond
5. Flow lines e. parallelgram
Answer:
1. b.
2. d.
3. e.
4. a.
5. c.
E. Answer the following questions in detail:
1. What is an algorithm?
Answer: An algorithm is a set of instructions given to computer to solve any mathematical or logical problem.
2. What are the three steps to write a program?
Answer:
1. Write an algorithm
2. Design a flowchart based on the algorithm
3. Conversion of flowchart into program.
3. What are the characteristics of an algorithm?
Answer:
1. Input
2. Output
3. Finiteness
4. Well-ordered
5. Unambiguous
6. Effectiveness
4. Write down three advantages of an algorithm?
Answer:
1. They are easy to understand and execute.
2. They make the removal of any type of error easy while solving out any problem.
3. They give clear description of all the steps needed to solve a problem.
4. They are free from any language specification.
5. Name four different symbols used in a flowchart.
Answer:
1. Start or Stop box
2. Input or Output box
3. Processing box
4. Decision box
5. Flow lines
6. Connector
6. Write down three limitations of a flowchart.
Answer:
1. When the program logic is quite complicated, flowchart becomes complex to understand.
2. Designing a flowchart requires more space than writing an algorithm.
3. If some modifications are required, the flowchart may require re-drawing completely.
F. Define the following:
1. Decision box 2. Input/Output box
3. Processing box 4. Connector
Answer:
1. Decision Box: It is used to indicate some decision making process on data.
2. Input or Output box: It is used to indicate the input or output of data.
3. Processing box: It is used to indicate the processing of data or some calculation.
4. Connector: It is used to connect the various sections of a flowchart to maintain its linear flow.
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