What is the size of boolean variable?
Where local and global variables are stored?
What is called module?
What is the use of join method?
Where is the find and replace?
What is externalizable?
Is array passed by reference in java?
What are advantages and disadvantages of OOPs?
different types of threads?
What is a singleton factory?
What is string immutability?
What are singleton services?
What is an interface in java? Explain