7th Class Computers Science Types of Computer Languages Developing Flowchart

      Developing Flowchart

Flowchart is a technique that allows you to represent computer program graphically. Using flowchart you can easily understand the logic of a program. A flowchart represents the logical and operational steps to be performed within the system for transforming the input process into output. Flowchart serves as a basis for discussion and communication between the system analysts and the programmers.  

   To create a flowchart, you need to use the following symbols:

• Start and Stop symbol
• Processing symbol
• Flow Line symbol
• Input /Output symbol
• Decision Making symbol  

   The following table describes all the symbols:  

SYMBOL	DESCRIPTION
	This symbol is used to represent the start and the end of an algorithm or process.
	This symbol is used to represent the logic used in a process or algorithm.
	This symbol is used to represent the input/output steps of a process.
	This symbol is used to represent the conditional situation of a process.
	This symbol is used to represent the flow of control in a process.

  While creating a flow chart you need to keep the following points in mind: 

• While creating a flow chart only a single flow line comes out from a process symbol.
• Flow direction of a process will always indicate either from left to right or from top to bottom, as shown in the following figure:

• In decision box only one flow line enters and multiple flow lines can come out, as shown in the following figure:  

• Only a single flow line comes out from starting process and enters single flow line in stop process, as shown in the following figure:

Start Stop

• Every flowchart contains a logical start and a logical end.        

 An algorithm is a group of logical instruction that generates the output according to given input. Which one of the following techniques allows you to represent an algorithm in a graphical way?

(A) Flowchart                                    

(B) Pseudo code

(C) Computer program                                 

(D) All of these

(E) None of these

Answer: (a)

Explanation

Correct Option:

(A) Flowchart is a technique that allows you to represent computer program graphically.

Incorrect Options:

(B) Pseudo code is an informal description of a computer program that is written in simple English.

(C) Computer program is a set of instructions.    

 Using flowchart you can easily understand the logic of a program. Which one of the following symbols represents the logic used in a process?

(A) Start and Stop symbol                           

(B) Processing symbol

(C) Flow Line symbol                                     

(D) All of these

(E) None of these  

Answer: (b)

Explanation

Correct Option:

(B) Processing symbol is used to represent the logic used in a process or algorithm.

Incorrect Options:

(B) Start and Stop symbol is used to represent the start and the end of an algorithm or process.

(C) Flow line symbol is used to represent the flow of control in a process.  

  Before developing a computer program, you need to develop algorithm. The algorithms are written in..............

(A) Pseudo code                                             

(B) Group of graphical symbols

(C) C                                                                     

(D) All of these  

(E) None of these  

Answer: (a)

Explanation

Correct Option:

(A) Pseudo code is an informal description of a computer program that is written in simple English.                                      

Incorrect Options:

(B) Group of graphical symbols is called flow chart.

(C) C is a programming language.