Can you talk about the key principles that guide software testing?

Key principles of software testing include:

• Early testing: start testing as early as possible in the development process to identify errors at early stages.
• Completeness and sufficiency: tests should cover all important functional and non-functional requirements.
• Repeatability: tests should be reproducible to verify fixes and regressions.
• Test independence: each test should be independent so that results do not depend on the order of execution.
• Test prioritization: check the most critical and frequently used functions first.
• Documentation: test cases and results should be well documented.
• Automation: automate repetitive tests where possible to increase efficiency.

These principles help improve product quality and reduce the risks of errors in release.