Which one is incorrect?

Question

Accepted Answer

The developer of any android phone is enabled by default.

Answer

The apk file of any app can be extracted using 'Apk extractor'

Answer

'switch ... case'  statements are mandatory in  'public void onClick(View v)'   function.

Answer

Multiple buttons with multiple  setOnClickListener  functions cannot be set inside  onCreate   function.

Answer

The java code of any apk file can be decompiled/uncovered using online java decompiler.

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