Question $1$

$2pts$

The relationship between use cases and data flow diagrams is:

Both are tools in a systems analysts toolbox, although they do unrelated things

Use cases come out of JAD sessions and clarify what was discussed by users in those sessions; DFD$\text{'}$s come out of analysts interviews

Data flow diagrams start with information in the use cases and the requirements. The set of DFDs that make up the process model simply integrates the individual use cases

They are the same thing $-$ use cases are process models using the DeMarco and Yourdon notation; and DFD$\text{'}$s are process models using the Gane and Sarson notation