What is a control flow?

What is a control flow?

• A. An edge that transports control tokens, conveying sequencing constraints among a set of actions.
• B. An edge that transports object tokens, conveying data between nodes.
• C. A separate diagram that models data flow.
• D. An arrow indicating boundary of a subactivity.

Answer: (A)

In this area, the idea being tested is how the order of actions is represented. Control flow is the edge that carries a control token from one action to the next, which enforces the sequence in which actions must occur. It governs the execution order, independent of any data being produced or consumed. This is different from data flow, which uses edges to pass data tokens between actions rather than directing the order of execution. A diagram that models only data flow describes how information moves, not the step-by-step sequence. And an arrow indicating the boundary of a subactivity relates to scope or nesting, not to the sequencing of actions themselves.

In this area, the idea being tested is how the order of actions is represented. Control flow is the edge that carries a control token from one action to the next, which enforces the sequence in which actions must occur. It governs the execution order, independent of any data being produced or consumed.

This is different from data flow, which uses edges to pass data tokens between actions rather than directing the order of execution. A diagram that models only data flow describes how information moves, not the step-by-step sequence. And an arrow indicating the boundary of a subactivity relates to scope or nesting, not to the sequencing of actions themselves.