a2zinterviews

46.

What is the difference between black box testing and white box testing?

Black box testing : No knowledge of the internal logic of the system is used to develop test cases. Uses validation techniques. Applied during later stages of testing. Examples include unit testing, integration testing, system testing, acceptance testing. White box testing : Knowledge of the internal logic of the system is used to develop test cases. Uses verification techniques Performed early in the testing process.

47.	Mention the various types of maintenance?
	The various types of maintenance are : Corrective maintenance Adaptive maintenance Perfective maintenance Preventive maintenance

48.	What is the difference between software engineering and system engineering?
	System Engineering - is concerned with all aspects of computer based systems development including hardware, software and process engineering. System Engineering - are involves in system specification architectural design intergration and deployment.