What is test coverage and what is 7principal of testing

Question

Accepted Answer

Test coverage is the measure of how much of the software is tested. 7 principles of testing are guidelines for effective testing.

Test coverage is the extent to which the software is tested against the requirements.
It is important to achieve maximum test coverage to ensure the software is reliable.
The 7 principles of testing are: testing shows presence of defects, exhaustive testing is impossible, early testing saves time and money, defects cluster together, testing is context dependent, absence of errors fallacy, and pesticide paradox.
For example, the principle of early testing saves time and money suggests that testing should be done as early as possible in the development cycle to catch defects before they become more expensive to fix.

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