a2zinterviews

37.	Why are the AWT components called the Heavy Weight Components?
	For a same application program, AWT components occupy more memory space than swing components. Moreover, AWT components are implemented by platform-specific code, while the swing components are platform-independent. Therefore, AWT components are called 'Heavy Weight Components', while, Swing components, called Light Weight Components.
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38.	What is called Synchronization with respect to multithreading?
	When two or more threads need access to a shared resource, they need some way to ensure that the resource will be used by only one thread at a time. The process by which this is achieved is called synchronization. The key to synchronization is the concept of the monitor (also called a semaphore). A monitor is an object that is used as mutually exclusive lock (or mutex). Only one thread can own a monitor at a given time.
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39.	Describe a File class in Java.io. package?
	The File class does not specify how the information is retrieved from or stored in files; it describes the properties of a file itself. A File object is used to obtain or manipulate the information associated with a disk file, such as the permissions, time, date, and directory path and to navigate subdirectory hierarchies.
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40.	Distinguish between Applets and Servlets with respect to their functionality?
	Applets provide a way of dynamically extended functionality of client side web browsers, whereas servlets dynamically extend the functionality of network servers. Servlets are to servers what Applets are to browsers.
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