Why singleton pattern is better than creating singleton class with static instance?
How do you remove an object from an arraylist in java?
Can we have multiple public classes in a java source file?
why we cannot declare static variable inside a static method
What’s the difference between unit, integration and functional testing?
Write a program in java to calculate the difference between the sum of the odd level and even level nodes of a binary tree.
What is difference between java and java ee?
What is a Java Virtual Machine?
Explain about fail fast iterators in java?
Explain how hashmap works?
Which Java operator is right associative?
What class is used to implement a Throwable array?
In collection sorting comparable and comparator interface will be used..but why this two interfaces required..two will work same purpose so why there are two interfaces instead of one?when to use comparator and when to use comparable?