Verification and validation is a form of testing that defense against error
prone software development and maintenance process.

Verification and validation are not the same, verification shows conformance
with the specifications and validation shows that the program meets the
customer's need

Verification : is a type of static testing as software inspection is convened
with analysis of the static system representation to discover problems.

Formal approach to document reviews

Intended explicitly for defect detection but not correction

Cannot check non functional characteristics such as performance, usability etc.

Many defects can be discovered in single inspection

Verification can be done on Requirements, specifications, design docs, Code

Validation : is a type of dynamic testing as software testing concerned with
exercising and observing product behaviour

One defect may mask another defect so several executions are required

Intended explicitly for correction

Validation is done in actual application and may be done on Prototype Validation
Take place after verification