BTEC DIT LAD1

In data flow diagrams, circles can be used to represent processes that take data inflows and transform them to information outflows.

• True

• False

This is the symbol for

• External entitles

• Processes

• Data stores

• Data flows

This is the symbol for

• External entitles

• Processes

• Data stores

• Data flows

In the data flow diagram (DFD), arrows represent which way the data goes (in or out); these are called...

• External entitles

• Processes

• Data stores

• Data flows

This is the symbol for

• External entitles

• Processes

• Data stores

• Data flows

This is the symbol for

• External entitles

• Processes

• Data stores

• Data flows

What is a Data Flow Diagram (DFD)?

• A DFD is a graphical representation of how data flows through a business information system

• A DFD is a flow chart that represent how data flows in a system

• A DFD is is a way to structure an organization using different levels of authority and a vertical link, or chain of command, between superior and subordinate levels of the organization

• A DFD is a chart showing how data is handled

• A DFD is a graphical representation of how data flows through a business information system

What does the following describe?

A person, object or company. For example, shop assistant, customer, credit card processor

• Entity

• Process

• Data store

• Data flow

What does the following describe?

An action that is taken. For example, collect payment, ship product. It can be numbered.

• Entity

• Process

• Data store

• Data flow

What does the following describe?

It may be a database or a file. It is where data is stored and may be numbered.

• Entity

• Process

• Data store

• Data flow