Definitions

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Bug / Defect:The deviation from the specification or standard
Validation:The testing phase of the life cycle ensures that the final product meets user needs.
Verification:All quality control activities through the life cycle to ensure that interim results meet your specifications input.

Verification: 1)Verification refers to the set of activities to ensure that program correctly implements a specific function imposed at the beginning of this phase of
2)Are they building the right product?

The considerations for planning verification:
1)The verification activity to be performed;
2)The methods used (control, tutorial, etc.);
3)Specific areas of work product & won't be verified;
4)The risks associated with areas that won't be verified;
5)Prioritize areas of work product to be verified;
6)The resources, schedule, facilities, tools, & responsibilities.

Validation:1)Validation refers to a different set of activities that the application has been built is attributable to customer needs
2)Are they building the right product?
3)HOW?

Validation methods:Black –box methods for function-based tests
1)Equivalence partitioning
2)Boundary-value analysis
3)Error guessing.

Structural Vs Functional Testing:Structural analysis based on the evidence tends to discover the errors that occur during the "codification" of the program
Functional analysis based on the evidence tends to discover the errors that occur in the implementation of the requirements or design specifications