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EJB Interview Questions and Answers

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EJB Interview Questions & Answers


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Questions Question: What is lazy loading?
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Questions Question: What are the services provided by container?
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Questions Question: How will you propagate exception thrown inside session bean to JSP or Servlet client?
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Questions Question: If session has thrown ApplicaitonException would you use EJBContext.setRollBackOnly method?
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Questions Question: Is Decorator an EJB design pattern?
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Questions Question: If i throw a custom ApplicationException from a business method in Entity bean which is participating in a transaction, would the transaction be rolled back by container. Does container rolls back transaction only in case of SystemExceptions?
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Questions Question: Can i map more than one table in a CMP?
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Questions Question: What are simple rules that a Primary key class has to follow?
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Questions Question: How is Stateful Session bean maintain their states with client?
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Questions Question: Is it possible to invoke multiple Session beans from one Session bean using Reflection?
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Questions Question: Is it possible to share an HttpSession between a JSP and EJB. What happens when I change a value in the HttpSession from inside an EJB?
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Questions Question: What is clustering. What are the different algorithms used for clustering?
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Questions Question: How to implement an entity bean which the PrimaryKey is an autonumeric?
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Questions Question: How many EJB Objects are created for a Bean?
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Questions Question: What is abstract schema?
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Questions Question: What is re-entrant. Is session beans reentrant. Is entity beans reentrant?
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Questions Question: Why an onMessage call in Message-driven bean is always a seperate transaction?
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Questions Question: Does Stateful Session bean support instance pooling?
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Questions Question: Why does EJB needs two interfaces(Home and Remote Interface)
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Questions Question: Can I invoke Runtime.gc() in an EJB?
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Latest 10 Answers
When there is any situation that u should attach a new patch to ur kernel , then download the patch and install it,to make changes to kernel , go to ok prompt and type boot -r, it will update or reconfigure the kernel
Honesty, helpful and reliable
procedure is a set of sql statement ,are combined to gether to perform a specific task or to solve a specifi problem.it does not return value.
leadership is power to influence a group so that the members willingly exert efforts as aspired by the leader.
I have the unique combination of technical skill and the ability to build strong customer relationship. I have the ability to stay focussed in stressfull situation. I would be great addition to your team.
first execute the bc search spec to fetch the data then executes the applet search spec if applet search spec is not match with bc it skips
TCP-Transmission Control Protocol. TCP is Reliable. TCP is Connection oriented. UDP-User Datagram Protoco UDP is Unreliable. UDP is Connectionless.
By default in structure all data member and member function are public,i,e if you not mentation any access specifier. But in case of class By default all data member and member function are private.
Structure is a user defined data type. By default all structure variables are public type and we cann't use access specifier in structure type variable, where as in class we can define objects(variables) under required access specifier type.
variable cost is the cost which is not fixed in nature

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