Core Java - Interview Questions and Answers for 'Permgen' | Search Interview Question

Core Java - Interview Questions and Answers for 'Permgen' - 2 question(s) found - Order By Newest

Q1. What is PermGen or Permanent Generation ?

Ans. The memory pool containing all the reflective data of the java virtual machine itself, such as class and method objects. With Java VMs that use class data sharing, this generation is divided into read-only and read-write areas. The Permanent generation contains metadata required by the JVM to describe the classes and methods used in the application. The permanent generation is populated by the JVM at runtime based on classes in use by the application. In addition, Java SE library classes and methods may be stored here.

Help us improve. Please let us know the company, where you were asked this question :

_{Like Discuss Correct / Improve java jvm memory management permgen permanent generation advanced architecture Asked in 9 Companies expert}

Related Questions

What are different ways to create String Object? Explain.

Does garbage collection guarantee that a program will not run out of memory?

Describe, in general, how java's garbage collector works ?

Describe what happens when an object is created in Java ?

What are various types of Class loaders used by JVM ?

Why two types of memory - stack and heap are required by Java ?

Should we override finalize method ?

What are strong, soft, weak and phantom references in Java ?

Which memory areas does instance and static variables use ?

Can we call the garbage collector explicitly ?

Q2. What is metaspace ?

Core Java

Ans. The Permanent Generation (PermGen) space has completely been removed and is kind of replaced by a new space called Metaspace. The consequences of the PermGen removal is that obviously the PermSize and MaxPermSize JVM arguments are ignored and you will never get a java.lang.OutOfMemoryError: PermGen error.