Data Flow Diagram (DFD) Quiz

What is the rule regarding data flow between two entities?

• Data cannot flow between two entities.

• Data can flow freely between entities.

• Data can only flow from a process to an entity.

• Data can flow from an entity to a datastore.

Can data flow directly between two datastores?

• Data can flow from a process to a datastore.

• Data can flow from a datastore to an entity.

• No, data cannot flow between two datastores.

• Yes, data can flow directly between datastores.

What must happen before data flows from an entity to a datastore?

• Data must be processed by a process.

• Data must be stored in another entity first.

• Data must be retrieved from the datastore.

• Data can flow directly without processing.

How many input data flows must a process have?

• Only one input data flow.

• At least two input data flows.

• At least one input and one output data flow.

• No input data flows are required.

What is required for a datastore to function properly?

• It only needs an output data flow.

• It must have multiple input data flows.

• It can operate without any data flows.

• It must have at least one input and one output data flow.

Can two data flows cross each other in a DFD?

• Yes, they can cross each other.

• No, two data flows cannot cross each other.

• Only if they are from the same entity.

• Only if they are from different processes.

What is the minimum requirement for processes in a system?

• They must only link to entities.

• They must have multiple data stores.

• They can exist independently without any links.

• They must be linked to at least one data store or another process.

What is the relationship between entities and processes in a DFD?

• Data can flow directly from an entity to another entity.

• Data must flow from an entity to a process before going to a datastore.

• Entities do not interact with processes.

• Processes can only receive data from datastores.

What is the role of a process in a DFD?

• To store data.

• To process data and produce output.

• To link entities directly.

• To manage data flows between datastores.

What happens to data after it is processed by a process?

• It is discarded.

• It can only flow to another process.

• It must go to a datastore or another entity.

• It can flow back to the same process.