Set - 1

Question 26 :

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 IO, 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 27 :

Can a lock be acquired on a class?

Answer :

Yes, a lock can be acquired on a class. This lock is acquired on the class's Class object.


Question 28 :

What's new with the stop(), suspend() and resume() methods in JDK 1.2?

Answer :

The stop(), suspend() and resume() methods have been deprecated in JDK 1.2.


Question 29 :

What is the preferred size of a component?

Answer :

The preferred size of a component is the minimum component size that will allow the component to display normally.


Question 30 :

What's the difference between J2SDK 1.5 and J2SDK 5.0?

Answer :

There's no difference, Sun Microsystems just re-branded this version.