What is string data?
How do weakhashmap works?
How GC (Garbage Collector) knows the objects reference is unused.Whether GC removes the unused object Parmanently or it maintains something.
Difference between process and thread?
When do we need to use internal iteration? When do we need to use external iteration?
where is .equals() method and how is it different from == operation <giving some confusing implementation> Is hashing related to these?
What is difference between Heap and Stack Memory?
What is this keyword in java?
Explain difference between final, finally and finalize?
How many types of packages are there in Java?
Can we create an object of private class?
Is java owned by oracle?
What are void methods?