Explain thread in java?
When will we use them?
How to optimize the javac output?
Have you ever used hashtable and dictionary?
Explain the difference between call by refrence and call by value?
Does constructor return any value?
Give a brief description of java socket programming?
How many boolean functions are there?
What is java util collection?
how to create constants in java?
Are functions objects in java?
What are methods?
Which class is the superclass of all classes?
Where can I find jdk in my computer?
Does string is thread-safe in java?