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JAVA STRING INTERVIEW QUESTIONS AND ANSWERS
A String is a non-primitive data type which represent the sequence of characters enclosed in double quotes . String can conrain letters , numbers , spaces , symbols and punctuation .
Key characteristics of Java String are Immutability , Memory Optimization and constant pool. String is immutable because once a string object is created , its value cannot be changed . Java uses special memory location called String Constant Pool inside the heap memory .If you create multiple strings with same text literal , Java points to the same memory slot inside the Constant Pool to save space.