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Welcome Anonimous.User to this quiz related to Java Security.

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Question:
When does JVM have an instance of the SecurityManager class?

When running applet within Java Plugin.


When -Djava.security.manager option is specified.


JVM instantiates SecurityManager on the first attempt of execution of secure operation (for example, working with files, network ...)

Explanantion
Objective: Security manager in J2EE applications
After calling System.setSecurityManager() method.
When running applet within Java Plugin.
When -Djava.security.manager option is specified.
System.setSecurityManager(SecurityManager sm) method sets the system security manager to the given object. When you specify the -Djava.security.manager option to a Java application, the virtual machine executes the setSecurityManager( ) method on your behalf, before it calls the main( ) method of your application.
The Java Plug-in and appletviewer use a modified implementation and install it before they load any applets.


After calling System.setSecurityManager() method.


JVM 1.2 and higher always has an instance of SecurityManager.
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