Data Flow Diagrams Quiz

What is a Level 0 Data Flow Diagram commonly referred to as?

• Process diagram

• Context diagram

• Workflow diagram

• Entity-Relationship diagram

What does a rectangle represent in a Data Flow Diagram?

• Process

• External entity

• Data store

• Data flow

Which of the following is NOT a component of a DFD?

• Process

• Data flow

• Decision tree

• Data store

What is the primary purpose of a Level 0 DFD?

• To show detailed processes and data stores

• To describe the entire system’s scope in one diagram

• To focus on individual modules of the system

• To create a database schema

In a Level 1 DFD, what compared to a Level 0 DFD?

• External entities only

• Subprocesses and data flows within the main processes

• System-wide data stores

• None of the above

A Level 0 DFD shows all detailed processes of a system.

• True

• False

Data flows in a DFD must always connect to at least one process.

• True

• False

Level 1 DFDs break down high-level processes into smaller, more detailed processes.

• True

• False

Describe the difference between a Level 0 DFD and a Level 1 DFD.

Why is it important to clearly identify all external entities in a Level 0 DFD?