What are the principles of software testing?

The principles of software testing are:

Testing shows the presence of defects: It can’t prove the absence of defects, only reveal their existence.
Exhaustive testing is impossible: It’s impractical to test all possible scenarios; prioritization is key.
Early testing: Start testing as early as possible in the development process to find defects early.
Defect clustering: A small number of modules often contain most defects.
Pesticide paradox: Repeated tests won’t find new defects; new test cases are necessary.
Testing is context-dependent: Different applications need different testing approaches.

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