In Java, which one will be used for comparing whether the two String object str 1 and str2 are same

1. In Java, which one will be used for comparing whether the two String object str 1 and str2 are same

[Assistant Programmer 2016 [MCQ] : 2016]

1. str1 = str2

2. strl.equalsignoreCase(str2)

3. strl==str2

4. All of the above

Answer

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