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Java Interview Questions & Answers

Java Technical Interview Questions

Easy 5 views

How do == and equals differ when comparing Java strings?

For objects, == compares reference identity, while equals can compare logical content according to the class implementation. String overrides equals to compare character sequences. Interning may make ...

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What makes an object effectively immutable in Java?

Its externally observable state cannot change after construction. Use private fields, initialize them fully, avoid mutating methods, and prevent uncontrolled subclass behavior where necessary. A final...

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