Acc. to BS 7925-I:-

Validation- Is product made according to the product that user intended- "Is Specification correct"

Verification:-  "Is product made according to requirements"

Verification :

Verification is a process in which information is checked using accurate measures. E.g. when you enter a new password you are asked to retype it to verify that the password supplied is correct.Verification is CORRECTNESS.

Validation :

Validation however is the automatic process in which rules are applied in order to make information correct,e.g. if the right type of data is entered in a certain cell in a database.Validation is TRUTH.

Apologies Monu for the below Answers regarding Index. That information is mistakenly posted here.

Let me explain you the difference b/w Verification & Validation??

Verification is: Verifying whether all the features/functionalities are available or not (Which should be)

Validation is: Validating whether the existing Functionalities/features are working correctly or not as per the requirement.

There are five types of indexes: Unique and Non-Unique indexes, and Clustered and Non-Clustered indexes, and system generated block indexes for multidimensional clustered (MDC) tables .

There are five types of indexes: Unique and Non-Unique indexes, and Clustered and Non-Clustered indexes, and system generated block indexes for multidimensional clustered (MDC) tables .