Advanced Java - Java Programming Interview Questions and Answers | LucentBlackBoard

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26.	What restrictions are placed on the location of a package statement within a source code file?
	A package statement must appear as the first line in a source code file (excluding blank lines and comments).

27.	Can an object's finalize() method be invoked while it is reachable?
	An object's finalize() method cannot be invoked by the garbage collector while the object is still reachable. However, an object's finalize() method may be invoked by other objects.

28.	What is the immediate superclass of the Applet class?
	Panel

29.	What is the difference between preemptive scheduling and time slicing?
	Under preemptive scheduling, the highest priority task executes until it enters the waiting or dead states or a higher priority task comes into existence. Under time slicing, a task executes for a predefined slice of time and then reenters the pool of ready tasks. The scheduler then determines which task should execute next, based on priority and other factors.

30.	Name three Component subclasses that support painting.
	The Canvas, Frame, Panel, and Applet classes support painting.

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