Define array. Tell me about 2-D array.
Is it possible to override private or static method in java?
Implement a stack with push (), pop() and min() in O(1) time.
Is java a pure object oriented language?
What does three dots mean in java?
How can you make sure that your singleton class will always return single instance in multi-threaded environment?
What is the use of join method?
What is difference between public static and void?
Describe 2 different ways to concatenate two strings.
Why do we need data serialization?
What is a line separator in java?
What is meant by overloading?
What are variable names?
What is the current version of java?
Is map sorted in java?