Which statement is true about default values on parameters?

• A. They are ignored during evaluation
• B. They are compulsory to modify
• C. They hide the parameter
• D. They will be evaluated during search

Answer: (D)

When a parameter has a default value, that value is used as the actual input if you don’t provide one. During the search, these defaults aren’t skipped or forgotten—they’re resolved as part of the evaluation. If the default is a simple value, it’s used directly; if it’s an expression, that expression is evaluated to produce the concrete value before applying the rest of the search logic. This makes the behavior predictable because every parameter has a defined value at evaluation time.

So the statement that default values will be evaluated during search is describing what actually happens: the system uses those defaults and computes any needed expressions to determine the results.