v-stands for verification and validation.

VERFICATION:it specifies testing on documents like 
CRS,SRS,HLD and LLD'S.

VALIDATION:it specifies testing on programs,programs 
interconnection,software and changes in s/w.

VERIFICATION :

Verification specifies as per requirements the application 
or the product is developed or not.
->It is a Static Testing
->Involves Inspection,Walk-through,Peer-review

VALIDATION :
Validation specifies as per user need the application or 
the product is working or not.
->It is a Dynamic Testing
->Involves BBT & WBT

verification invovles on the one side of the v-model i.e
crs,srs,hld ,lld and validation means system and functional 
testing.
othermeaning is tat right product to build is verification
product right build is validation

Verification is process of confirming whether software 
meets its specifications.
Validation is process of confirming whether software meets 
user requirements

Verification - Are we building the Product RIGHT

This is to ensure that the Software product is build the 
right way

Validation - Are we building the RIGHT product

It is the testing done to ensure that the product works as 
expected,

verification is the first steps 
validation is the next steps , ie checking the verification 
is done correctly or not are examined by tester 


Example :  object questions are corrected by students is 
verification  ,  next steps checking same answers by the 
staff is called by  validations

For the above question i'm explaning definitions with 
logical reason.

Verification:

Verification typically involves reviews and meetings to 
evaluate documents, plans, code, requirements, and 
specifications. 
The determination of consistency, correctness & 
completeness of a program at each stage

Validation:
Validation typically involves actual testing and takes 
place after verifications are completed. 
The determination of correctness of a final program with 
respect to its requirements.

I hope you got it....

Thx,
Sudir
sudir.csc@gmail.com

Verification is process of confirming whether software 
meets its specifications.
Validation is process of confirming whether software meets 
user requirements