D) power failure
E) None of these
Correct Answer: B
Solution :A software bug is an error. Flaw, failure or fault in computer program or system that produces an incorrect or unexpected result. Or causes it to behave in unintended ways. Most bugs arise from mistakes and errors made by people in either a program's source code or its design, or in framework and operating systems used by such programs. And a few are caused by compilers producing incorrect code.
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