3 what is not true about functions in javascript a

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3. What is NOT true about functions in JavaScript? A. They can be anonymous B. They always return a value, even if that value might be undefined C. They can be passed a function as an argument D. They can execute concurrently with other functions Explanation: JavaScript is single-threaded.
4. Suppose you discover that the most recent code release contains a bug whose regression test will require extensive mocking or stubbing because the buggy code is convoluted. Which action is appropriate?
D. Depending on project priorities and project management, any of the above might be appropriate. Explanation: A is not appropriate since modifications are being done on the release branch, without the bug fix coming back into development. C is not appropriate, since it does not create a new branch to do the work. 5. Maintenance activities constitute ____ of overall software costs; the majority of maintenance costs are incurred by ____.
6. While performing high-level exploration of legacy code, which statement can you reasonably expect to be TRUE?

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