Describe the difference between white box and black box testing.Why is each important and necessary?

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1Compare and contrast the key differences in agile and non-agile approaches specific to testing
Supporting Activity: Test Coverage
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2 Explain why testing every line of code for correctness is still insufficient for ensuring that a program is bug-free. Give an example supporting the statement above.
Introduction to Software Testing
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3 Why not wait for many parts to be built, and then test them together? This seems to kill several birds with one stone.
4. Suppose that you have a developing application, tested so far, to which you add code.Why not, as the next step, test the combined result?
5. Explain why (a) white box testing, by itself, is not enough and (b) black box testing, by itself, is not enough.
6 Why is unit testing most commonly performed by software engineers who program and post-unit testing by QA personnel?
7 Why should test planning be specifically identified as an activity rather than being pursued informally when the time comes?.

8. In your own words, describe the difference between white box and black box testing.Why is each important and necessary?

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