Data flow modeling Questions

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1.

What is DFD stands for ?

A

Data Flowchart Diagram

B

Data Flow Diagram

C

Depict Flow Diagram

D

Data Flow Depicts

Correct Answer: C

Data flow diagram is graphical representation of flow of data in an information system

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2.

Which type of DFD concentrates on the system process, and flow of data in the system ?

A

Physical DFD

B

Logical DFD

C

Flowchart DFD

D

System DFD

Correct Answer: B

This type of DFD concentrates on the system process, and flow of data in the system.For example in a Banking software system, how data is moved between different entities.

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3.

How many levels of DFD is?

A

2

B

3

C

4

D

5

Correct Answer: B

There are generally 3 level of DFD: level 0, level 1, level 2.

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4.

Which of the following is not a component in DFD ?

A

Entities

B

Attributes

C

Process

D

Data Flow

Correct Answer: B

Attributes is not a component in DFD.

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5.

 HIPO model was developed by?

A

Microsoft

B

AT&T Labs

C

IBM

D

Oracle

Correct Answer: C

HIPO model was developed by IBM in year 1970.

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6.

What is level 2 in DFD means?

A

Highest abstraction level DFD is known as Level 2.

B

Level 2 DFD depicts basic modules in the system and flow of data among various modules.

C

Level 2 DFD shows how data flows inside the modules mentioned in Level 1.
 

D

All of the above

Correct Answer: C

Level 2 : At this level, DFD shows how data flows inside the modules mentioned in Level 1.

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7.

HIPO stand for ?

A

High Input Process Output

B

High Input Provide Output

C

Hierarchical Input Provide Output

D

Hierarchical Input Process Output

Correct Answer: D

HIPO (Hierarchical Input Process Output) diagram is a combination of two organized method to analyze the system and provide the means of documentation.

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8.

The context diagram is also known as _____________.

A

Level-0 DFD

B

Level-1 DFD

C

Level-2 DFD

D

All of the above

Correct Answer: A

Context diagram captures the various entities external to the system interacting with it and data flow occurring between the system and the external entities.

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9.

 A directed arc or line in DFD represents

A

Data Store

B

Data Process

C

Data Flow

D

All of the above

Correct Answer: C

It resembles data flow in the direction of the arrow

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10.

Which of the following is a function of CASE Tool ?

A

Supporting Structured analysis and design (SA/SD)

B

Maintaining the data dictionary

C

Checking whether DFDs are balanced or not

D

None of the above

Correct Answer: A

Supporting Structured analysis and design (SA/SD) is a function of CASE Tool.

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