Difference between Drivers and Stubs

Drivers-method used to call module(returns values also).
Stubs-Module used for testing that replaces CALLED module(acts as temporary module when actual module is not ready).

Difference between Mocks and Stubs

Mock object-takes care if the expected actions has worked out and would verify it.
Stub object-is used to pass to code,would act in certain ways of expectation but wont verify the actions.

Difference between Bug,Error,Failure,Defects

Bug-Functionality is not as per requirement.
Error-When there is problem with code.
Failure-When the problem reaches customer end
Defect-When the problem is resolved within development environment.

Difference between Priority and Severity

Severity-How badly the bug affects the application?
For eg:If an application crashes once in a while or rarely,then severity=major and priority=low

Priority-The order/scheduling for fixing the bugs by developer
For eg If company name is misspelled in site logo,then severity=minor and priority=high

Difference between SQA and SQC

SQA
-Set of activities for ensuring quality in software engineering process.
-Organization wide.
-Relates to all products that will ever be created by a process.

SQC
-Set of activities for ensuring quality in software products.
-Product/project specific.
-Relates to specific product.

Difference between Windows and Sql Server authentication

• SQL server authentication requires credentials,useful where multiple users can access to different databases on shared server.
• Windows authentication-Useful when accessing from same computer and does not require credentials since it already knows that someone is logged in into the OS with the correct credentials