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Java Interview questions: -Elaborate difference between SAX Parser and DOM Parser?

Following is the difference between SAX Parser and DOM Parser asked during Java interview questions.

SAX DOM
Event based processing Tree based processing
Traversing only from top to bottom that too once Traversing can be in any direction and any number of times
Document content cannot be modified in SAX Document content can be modified in DOM
A SAX parser serves the client application always only with pieces of the document at any given time A DOM parser always serves the client application with the entire document no matter   how much is actually needed by the client
More space efficient in case of a big input document is space inefficient when the document is huge

See the following video on String Literal Pool asked during java Interview:-

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Author:
Shivprasad Koirala
We conduct training for Java/J2EE technologies like design patterns, J2EE, Struts, Hibernate, Spring, Rich Interface etc. and likes to write articles on the same in free time.
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