When would you use Dynamic Expressions in Tosca?

• A. They are used to hard-code values during design time.
• B. You'll use Dynamic Expressions if you need to specify values in your TestCases that are not generated until those particular TestCases are executed.
• C. They only apply to test steps that fail.
• D. They are used to define global constants.

Answer: (B)

Dynamic Expressions are evaluated during test execution to provide values that depend on the runtime context. They are used when you need to supply values in your TestCases that aren’t known until that TestCase runs, such as results produced by earlier steps or environment-specific data. This lets the test adapt to what actually happens when it runs, rather than relying on fixed, design-time values. For example, if a previous action returns a newly created record’s ID, you can reference that ID with a dynamic expression for subsequent steps. They are not meant for hard-coded constants defined at design time, and they’re not only for handling failures—you use them whenever runtime-generated data is required.