Mastering Java 2025 – 400 Free Practice Questions to Pass the 'Thinking in Java' Exam

Question: 1 / 510

Which of these is a result of calling the default 'toString()' method in Java?

A unique identifier of the object

A string representation of the object's fields

The class name followed by the hash code of the object

The default 'toString()' method in Java returns a string representation of an object. It includes the class name followed by the hash code of the object, representing its memory address. Option A is incorrect because a unique identifier for an object is usually assigned by the JVM, not the 'toString()' method. Option B is incorrect because while the default 'toString()' method may include certain fields, this is not guaranteed and can be overridden by a custom implementation. Option D is incorrect because the memory location of an object is not the same as its hash code.

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The memory location of the object

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