Private Constructor in Java When to Use

Short Java Interview Question And Answer ?

1.Describe Garbage Collection in Java ?

Mechanism by which Java reclaims the memory inaccessible by the application.

2. What are the types of Polymorphism in Java ?

Static ( function overloading ) and Run time / overriding( Virtual functions )
"Inheritance"
3. Different ways of using threads ?

Extending Thread class and implementing runnable interface.
"COMPOSITION"
4. Difference between Composition and Inheritence ?

Has a relationship vs Is a relationship.

5. What are Static variables ?

Correspond to class and not objects. All objects share that variable.

Private Constructor in Java When to Use
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