Question

Advantages and disadvantagea of top down integration

Answer 1

Answer:

Disadvantages of top down integration testing :

Until a certain set of modules have been integrated, it may not be possible to observe meaningful system functions because of an absence of lower level modules and the presence of stubs.

Test case selection and stub design become increasingly difficult when stubs lie far away from the top level module.

Observation of test output is more difficult.

Stubs have to be written with utmost care as they will simulate setting of output parameters.

Advantages of top down integration testing :

Isolation of interface errors becomes easier because of incremental nature of top down integration.

Test cases designed to test the integration of a module are reused during the regression tests performed after integrating other modules.

Advantageous if major flaws occur toward the top of the program.

It provides early working module of the program and so design defects can be found and corrected early.

Explanation: