If you are given a Jar file , How can you go through it understand what it does

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Q1. If you are given a Jar file , How can you go through it understand what it does

Ans. It depends on if the jar file has source files or not. If it does have , I can open it in an IDE. If not, I can try looking documentation online if it's a public library or framework. If it's not a public library and no source file available, We can use a decompiler to generate source files from compiled class files.

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