Data Flow Diagrams Quiz

What does a data flow diagram show?

• How data is stored in a database

• How data moves between different processes in a system

• How to program a computer

• How to design a user interface

Why is a data flow diagram useful when designing a system?

• It helps in creating a user manual

• It breaks down the system into processes and data flows

• It provides a list of software requirements

• It shows the hardware specifications

What might seem daunting about data flow diagrams?

• Understanding the programming language

• Interpreting and creating them

• Designing the user interface

• Writing the system documentation

What does an external entity represent in a data flow diagram?

• A process within the system

• A data store

• A person, organization, or outside system that sends or receives data

• A decision point

What is the purpose of standardized symbols in data flow diagrams?

• To make diagrams look more complex

• To interpret information easily

• To confuse the reader

• To add color to the diagram

What does a process symbol in a data flow diagram indicate?

• A storage location

• An instruction or action that produces an output

• A data input

• A network connection

What is a Data Store in a Data Flow Diagram?

• A file, form, or database table that will hold data for later use.

• The direction that data is moving between entities.

• A process that transforms data.

• An external entity that interacts with the system.

What does a Data Flow represent in a Data Flow Diagram?

• A file, form, or database table.

• The direction that data is moving between external entities, processes, and data stores.

• A process that transforms data.

• An external entity that interacts with the system.

Which of the following is a rule for creating a data flow diagram?

• Every process must have at least one input and one output.

• Every process can have only outputs.

• Data can flow directly between external entities.

• A data store can have only inputs.

What must data flowing into a data store do according to the rules for creating a data flow diagram?

• Go through a process.

• Go directly to another data store.

• Go directly to an external entity.

• Skip the process step.