What is singleton service?
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what is the difference between String and StringBuffer classes?
What is difference between abstract class & final class
How do you write methodology?
Explain different forms of polymorphism?
What are multiple inheritances?
When do you call copy constructor?
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What is a void return type?
Write POJO class as a key to hashmap???
There are three interfaces A,B & C. A extends B, B extends C, and C extends A.Is it multiple Inheritance? please anybody help me.....
List java api that supports threads?
What is parameter example?
Can we override tostring method in java?