Query

Please Explain me:
1.Demonstrate Software product are fit for purpose.
2.Is static testing same as black box testing? and how can we find errors without executing the code as told in static testing?

It is like reviewing documents, checking the web pages without having links, Button levels etc....

Sir, is it like just to check requirement specification?

Static testing is mainly verification where the application is not actually used. Once the developer completes the coding it is reviewed by another team member to check the syntex / algorithm which is called as peer review. Inspection, walkthrough are static testing methods.

Yes, fit for purpose is the process of validation carried out to demonstrate that the delivered system can be used to carry out the tasks for which it was acquired.

Yes, black box testing point view, static testing process which is involves the reviewing the requirement and specification to check the completeness or appropriateness. This is the verification portion of Verification and Validation. Main objective of this testing is to improve the quality of product/application by finding the error in the early stages of development life cycle.

We can find the error by reviews of the documents. This reviews are done during initial phase of testing to detect the defect early in STLC.Testing Techniques used for Static Testing is like Informal Reviews, Technical Reviews, Walkthrough, Inspection, Static code Review without executing the code