Verification is nothing but whether the application is
correct or not

Validation is nothing but whether the application is working
w.r.t customer requirements.

Verification: The process of evaluating a system or 
component to determine whether the products of the given 
development phase satisfy the conditions imposed at the 
start of that phase.

Validation:  Determination of the correctness of the 
products of software development with respect to the user 
needs and requirements.

verification: verification is to ensure that weather we 
built software right r not.

validation: validation is to ensure that weather we built 
right software r not.

Verification: The process of preventing the error 

Validation : The process of checking the error

Verification: Process of evaluation before execution of the 
application


Validation: Process of evaluation after execution of the 
application

Verification:- 
1) It is static process.
2) It is a process of prevention of errors.
3) It consist of checking the requirements specification.
4) Error/Issue found at this stage are very less cost
   effective.

Validation:-
1) It is dynamic process.
2) It is a process of detection of errors.
3) it consist of validating the requirements specification
   with the help of executing on machine or PC. 
4) Error/Issue found at this stage is very high cost 
   effective.