When performing top-down testing, which of the following tools is used in place of a...

Top-down testing involves testing the top-level modules first and progressively integrating and testing lower-level modules.

Stubs :

Definition : A stub is a piece of code used to simulate the behavior of lower-level modules that are not yet developed or integrated.

Functionality : Provides a temporary implementation that allows the top-level module to be tested without the presence of actual lower-level modules.

Purpose in Top-Down Testing :

Facilitate Testing : Enables the testing of higher-level modules early in the development process.

Incremental Integration : Supports the progressive integration of modules as they become available.