Question 1 (10 points) What are the four major components of a DFD? Question 2 (

Question

Question 1 (10 points)

What are the four major components of a DFD?

Question 2 (10 points)

What is the difference between "Programming" and "Software Engineering"?

Question 3 (10 points)

Write a brief description of a Data Flow Diagram (DFD).

Question 4 (10 points)

A control Process supervises and coordinates the activities of the other bubbles in the Data Flow Diagram. It is represented graphically as a …………………..

Question 5 (10 points)

A Control Flow carries only………………….information. It is represented graphically as a dashed line.

Question 6 (10 points)

A double-headed Data Flow represents …………….flow of information.

Question 7 (10 points)

The terminator shows the external entities with which the system communicates. The Terminator is graphically represented as a …………..

Question 8 (10 points)

Give an example of the use of the "[]" notation.

Question 9 (10 points)

Give an example of the use of the iteration "{}" notation.

Question 10 (10 points)

Correct the following Data Dictionary definitions:

a = b + {c} + (d|e)

Explanation / Answer

1.)

Four major components of DFDs are given as follows:

External entity: External entities are represented by squares.

Processes: Processes are represented by circles rectangle with round corner

Data Flows: Arrows are used to represent the flow of data.

Datastores: Open-ended rectangles are used to represent.

2.)

Programming is writing a set of logics to manipulate some set of data to perform some kind of operation.

Software engieering is the application of systematic, diciplined and quantifiable approach to the development, operation and maintenance of the software.

3.)

A data flow diagram (DFD) is a representation of data which is graphical (flow)with the help of an information system, modeling the process aspects as well. A data flow diagram is created generally to create preliminary steps or to create an overview of software, model or system. Data flow diagram also shows the processing of the data in a structural manner also called structural processing.

A DFD shows what kind of information will pe produced by a system after putitng some input and generating output.

4.)

circles rectangle with rounded corners

5.)

Data

6.)

Bidirectional

7.)

Rectangle

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