Programming Tutorials

Explain garbage collection?

By: Karthik in Interview Tutorials on 2012-06-16  

Answer: Garbage collection is one of the most important feature of Java. Garbage collection is also called automatic memory management as JVM automatically removes the unused variables/objects (value is null) from the memory. User program cann't directly free the object from memory, instead it is the job of the garbage collector to automatically free the objects that are no longer referenced by a program. Every class inherits finalize() method from java.lang.Object, the finalize() method is called by garbage collector when it determines no more references to the object exists. In Java, it is good idea to explicitly assign null into a variable when no more in use. I Java on calling System.gc() and Runtime.gc(), JVM tries to recycle the unused objects, but there is no guarantee when all the objects will garbage collected.





Add Comment

* Required information
1000

Comments

No comments yet. Be the first!

Most Viewed Articles (in Interview )

Question: What is a Hidden Comment in JSP?

What types of comments are available in the JSP?

Tell me something about J2EE component?

The output of System.out.println(5<<2) in Java

Interview Question: What is re-entrant. Is session beans reentrant. Is entity beans reentrant?

What is the difference between jsp:include page and @ include file?

What is Collection API?

Name the containers which uses Border Layout as their default layout?

Interview Question: Do ActionForms have to be true JavaBeans?

What is the difference between jsp:forward and response.sendRedirect(url)

Interview Question: What is abstract schema?

What is the difference between Session Bean and Entity Bean?

What is J2EE Connector architecture?

Why J2EE is suitable for the development of distributed multi-tiered enterprise applications?

What is the difference between JTS and JTA?

Latest Articles (in Interview)