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Answers
celebrate New Year
Answer
Step 1: Start
Step 2: Prepare a guest list for New Year party
Step 3: Decide the venue, food menu, games and fun activities for the party
Step 4: Invite the guests for the party
Step 5: On New Year eve, get ready and enjoy the party
Step 6: Stop
Question 3
To make tea/coffee
Answer
Step 1: Start
Step 2: Boil water in a saucepan
Step 3: Add tea to boiling water
Step 4: Add sugar to boiling water
Step 5: Add milk to boiling water
Step 6: Boil this water with all the ingredients for 2 mins
Step 7: Sieve the tea in a cup
Step 8: Stop
Question 4
To celebrate Teachers' Day
Answer
Step 1: Start
Step 2: Decide the activities for teachers' day like dance performances, plays, etc.
Step 3: Form groups of students and assign the decided activities from step 2 to each group.
Step 4: Decide the practice timings for each group.
Step 5: Each group to practice as per the timings decided in step 4.
Step 6: Invite the teachers to Teachers' Day celebrations.
Step 7: Perform the activities planned in step 2 on Teachers' Day
Step 8: Stop
Answer the following questions
Question 1
What is a flowchart? What are the features of a flowchart?
Answer
A flowchart is a pictorial representation of an algorithm. It uses boxes of different shapes to represent different types of instructions. These boxes are connected with arrow marks to indicate the flow of operations.
The features of a flowchart are:
It is an easy method of communication.
It is independent of a programming language.
It is the key to correct programming.
It helps to plan and design a new system.
It clearly indicates the task to be performed at each level.
Question 2
What is an algorithm? What are its characteristics?
Answer
An algorithm is defined as the sequence of instructions written in simple English that are required to get the desired results. It helps to develop the fundamental logic of a problem that leads to a solution.
Some characteristics of an algorithm are as follows:
Each step of an algorithm must be precisely defined.
An algorithm must contain blocks that will help to solve problems more efficiently and logically.
It should accept a set of inputs and produce a defined output.
It must be terminated after a finite number of steps.
It should be independent from a computer programming language.
It should develop a platform for writing programs.
Question 3
Define the following and draw their symbols:
(a) Process Box
Answer
A process box is used to represent all types of mathematical tasks like addition, subtraction, multiplication, division, etc.
Process Box Flowchart Class 8 ICSE Computer Studies
(b) Terminal Box
Answer
Terminal Box is used to indicate the beginning (START) and the end (STOP) of a flowchart. A terminal box with the word 'START' is used at the beginning and a box with the word 'STOP' is used at the end of a flowchart.
Start Symbol Flowchart Class 8 ICSE Computer Studies
Stop Symbol Flowchart Class 8 ICSE Computer Studies
(c) Input/Output Box
Answer
Input/Output Box is used to represent an input/output operation of a task. Statements like INPUT, PRINT, etc. are used in these boxes.
Input Output Box Flowchart Class 8 ICSE Computer Studies
(d) Decision Box
Answer
Decision Box is used to check a condition in a flowchart. The Decision Box has two paths, one if the condition is true and the other is the condition is false.
Decision Box Flowchart Class 8 ICSE Computer
Answer:
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