Data Flow Diagra,

What can a level 1 DFD include that a context diagram cannot

• Data Stores

• Multiple external entities

• Direct entity to entity communication

• direct data store to data store communication

What is most important to customers who want to complete transitions online?

• Security of transactions

• Consistent placement of navigation

• Speed of processing transactions

• Cost of developing the site

Choose 2 sentences that are the correct

• A level 1 DFD notates each of the main sub-processes that together form the complete system.

• A level 1 DFD does not include external entities

• A level 1 DFD MUST include one and only one external entity

• We can think of a level 1 DFD as an “exploded view” of the context diagram”.

 What does this notation represent in a data flow diagram?

• Decision

• Entity

• Process

• Datastore

What does this notation represent in a data flow diagram?

• Process

• Sink

• Source

• Entity