Set - 6

Question 66 :

What are three ways in which a thread can enter the waiting state?

Answer :

A thread can enter the waiting state by invoking its sleep() method, by blocking on I/O, by unsuccessfully attempting to acquire an object's lock, or by invoking an object's wait() method. It can also enter the waiting state by invoking its (deprecated) suspend() method.


Question 67 :

Can an abstract class be final?

Answer :

An abstract class may not be declared as final.


Question 68 :

What is the ResourceBundle class?

Answer :

The ResourceBundle class is used to store locale-specific resources that can be loaded by a program to tailor the program's appearance to the particular locale in which it is being run.


Question 69 :

What happens if a try-catch-finally statement does not have a catch clause to handle an exception that is thrown within the body of the try statement?

Answer :

The exception propagates up to the next higher level try-catch statement (if any) or results in the program's termination.


Question 70 :

What is numeric promotion?

Answer :

Numeric promotion is the conversion of a smaller numeric type to a larger numeric type, so that integer and floating-point operations may take place. In numerical promotion, byte, char, and short values are converted to int values. The int values are also converted to long values, if necessary. The long and float values are converted to double values, as required.