The translator which performs macro calls expansion is called :

Answer: Macro pre-processor

Explanation:

• A macro pre-processor performs macro call expansion as a preprocessing step before compilation. It replaces macro invocations with their corresponding definitions (textual substitution).

• The output of the macro pre-processor is source text with macros expanded; that output is then passed to the compiler.

• Example: if a macro defines PI as 3.14, any occurrence of PI is replaced with 3.14 by the pre-processor before compilation.

Why the other choices are incorrect:

• "Macro processor": This is an informal term and can be ambiguous. The standard and precise term for the translator that expands macros before compilation is macro pre-processor.

• "Micro pre-processor": Not a recognized standard term in compiler design; likely a confusion with other terms.

• Dynamic linker: Operates at link/load time to resolve symbols and link modules or libraries, not at the preprocessing stage for macro expansion.

Takeaway: The component responsible for expanding macros before compilation is the macro pre-processor.