JAVA Classes-and-objects Online Test

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Instructions:

  • Total number of questions: 10.
  • Time allotted: 10 minutes.
  • Each question carries 1 mark.
  • No negative marks.
  • DO NOT refresh the page.
  • All the best :-)

What You Will Learn:

This Java Classes & Objects Online Test helps you to Boost your Knowledge in Java. In this test, we cover topics in the form of questions like:
  • Class as an abstract template vs Object as a concrete heap-allocated instance.
  • Memory layout: Stack (reference pointers) vs Heap (object instances and state).
  • Instantiation using the new operator and invoking constructors.
  • Anonymous objects for one-time method execution.
  • Unreferenced objects, garbage collection eligibility, and toString() representation.
  • java.lang.Object as the universal root superclass of all Java classes.

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