$(10$ points$)$Present the difference between validation and verification testing.

$(9$ points$)$Why software can't be proved right? Give examples to demonstrate the reasons.

$6.(12$ points$)$How can we reduce number of test cases in Black Box Testing? Explain with example.

$7.(8$ points$)$List some software testing tools used widely. $8.(10$ points$)$Explain the Load testing and Performance testing.