Core Java Interview Questions And Answers

What state does a thread enter when it terminates its processing?
Ans- When a thread terminates its processing, it enters the dead state.


What is the Collections API?
Ans- The Collections API is a set of classes and interfaces that support operations on collections of objects.

Which characters may be used as the second character of an identifier, but not as the first character of an identifier?
Ans- The digits 0 through 9 may not be used as the first character of an identifier but they may be used after the first character of an identifier.


What is the List interface?
Ans- The List interface provides support for ordered collections of objects.


How does Java handle integer overflows and underflows?
Ans- It uses those low order bytes of the result that can fit into the size of the type allowed by the operation.