http://techinterview.weebly.com/ejb1.html

EJB Interview Questions


What are the special design care that must be taken when you work with local
interfaces 
?<http://techinterview.weebly.com/9/post/2008/08/what-are-the-special-design-care-that-must-be-taken-when-you-work-with-local-interfaces.html>

Brief description about local interfaces
?<http://techinterview.weebly.com/9/post/2008/08/brief-description-about-local-interfaces.html>

What is the advantage of using Entity bean for database operations, over
directly using JDBC API to do database operations? When would I use one over
the other 
?<http://techinterview.weebly.com/9/post/2008/08/what-is-the-advantage-of-using-entity-bean-for-database-operations-over-directly-using-jdbc-api-to-do-database-operations-when-would-i-use-one-over-the-other.html>

Can you control when passivation occurs
?<http://techinterview.weebly.com/9/post/2008/08/can-you-control-when-passivation-occurs.html>

What is Entity Bean
?<http://techinterview.weebly.com/9/post/2008/08/what-is-entity-bean.html>

What are the two important TCP Socket
classes?<http://techinterview.weebly.com/9/post/2008/08/what-are-the-two-important-tcp-socket-classes.html>

What technologies are included in
J2EE?<http://techinterview.weebly.com/9/post/2008/08/what-technologies-are-included-in-j2ee.html>

What is the difference between EJB and Java
beans?<http://techinterview.weebly.com/9/post/2008/08/what-is-the-difference-between-ejb-and-java-beans.html>

What is EJB role in
J2EE?<http://techinterview.weebly.com/9/post/2008/08/what-is-ejb-role-in-j2ee.html>

Tell something about Local
Interfaces.<http://techinterview.weebly.com/9/post/2008/08/tell-something-about-local-interfaces.html>

What is Enterprise JavaBeans (EJB)
container?<http://techinterview.weebly.com/9/post/2008/08/what-is-enterprise-javabeans-ejb-container.html>
http://techinterview.weebly.com/ejb1.html
What is in-memory
replication?<http://techinterview.weebly.com/9/post/2008/08/what-is-in-memory-replication.html>

What is a 
Clone?<http://techinterview.weebly.com/9/post/2008/08/what-is-a-clone.html>

What are the types of
Scaling?<http://techinterview.weebly.com/9/post/2008/08/what-are-the-types-of-scaling.html>

What are the special design care that must be taken when you work with local
interfaces 
?<http://techinterview.weebly.com/9/post/2008/08/what-are-the-special-design-care-that-must-be-taken-when-you-work-with-local-interfaces1.html>

Brief description about local interfaces
?<http://techinterview.weebly.com/9/post/2008/08/brief-description-about-local-interfaces1.html>

How EJB Invocation
happens?<http://techinterview.weebly.com/9/post/2008/08/how-ejb-invocation-happens.html>

Can the primary key in the entity bean be a Java primitive type such
as 
int?<http://techinterview.weebly.com/9/post/2008/08/can-the-primary-key-in-the-entity-bean-be-a-java-primitive-type-such-as-int.html>

What are transaction
attributes?<http://techinterview.weebly.com/9/post/2008/08/what-are-transaction-attributes.html>

What is Session
Bean?<http://techinterview.weebly.com/9/post/2008/08/what-is-session-bean.html>

What happens if remove( ) is never invoked on a session
bean?<http://techinterview.weebly.com/9/post/2008/08/what-happens-if-removeis-never-invoked-on-a-session-bean.html>

What is EJB 
QL?<http://techinterview.weebly.com/9/post/2008/08/what-is-ejb-ql.html>

What is an EJB 
Context?<http://techinterview.weebly.com/9/post/2008/08/what-is-an-ejb-context.html>

What is the need of Remote and Home interface. Why cant it be in
one?<http://techinterview.weebly.com/9/post/2008/08/what-is-the-need-of-remote-and-home-interface-why-cant-it-be-in-one.html>
http://techinterview.weebly.com/ejb1.html
How can I call one EJB from inside of another
EJB?<http://techinterview.weebly.com/9/post/2008/08/how-can-i-call-one-ejb-from-inside-of-another-ejb.html>

Can I develop an Entity Bean without implementing the create() method in the
home 
interface?<http://techinterview.weebly.com/9/post/2008/08/can-i-develop-an-entity-bean-without-implementing-the-create-method-in-the-home-interface.html>

Static variables in EJB should not be relied upon as they may break in
clusters.Why?<http://techinterview.weebly.com/9/post/2008/08/static-variables-in-ejb-should-not-be-relied-upon-as-they-may-break-in-clusterswhy.html>

When should I adopt BMP and when I should use
CMP?<http://techinterview.weebly.com/9/post/2008/08/when-should-i-adopt-bmp-and-when-i-should-use-cmp.html>

What are the methods of Entity
Bean?<http://techinterview.weebly.com/9/post/2008/08/what-are-the-methods-of-entity-bean.html>

What are the methods of Entity Bean?What is the difference between
Container-Managed Persistent (CMP) bean and Bean-Managed
Persistent(BMP)
?<http://techinterview.weebly.com/9/post/2008/08/what-are-the-methods-of-entity-beanwhat-is-the-difference-between-container-managed-persistent-cmp-bean-and-bean-managed-persistentbmp.html>

What are the different kinds of enterprise
beans?<http://techinterview.weebly.com/9/post/2008/08/what-are-the-different-kinds-of-enterprise-beans.html>

What is Message Driven
Bean?<http://techinterview.weebly.com/9/post/2008/08/what-is-message-driven-bean.html>

What is abstract
schema?<http://techinterview.weebly.com/9/post/2008/08/what-is-abstract-schema.html>

What is local interface. How values will be
passed?<http://techinterview.weebly.com/9/post/2008/08/what-is-local-interface-how-values-will-be-passed.html>

What is the difference between JavaBean and
EJB?<http://techinterview.weebly.com/9/post/2008/08/what-is-the-difference-between-javabean-and-ejb.html>

What is the difference between Message Driven Beans and Stateless Session
beans?<http://techinterview.weebly.com/9/post/2008/08/what-is-the-difference-between-message-driven-beans-and-stateless-session-beans.html>
http://techinterview.weebly.com/ejb1.html
What is the difference between find and select methods in
EJB?<http://techinterview.weebly.com/9/post/2008/08/post-title-click-and-type-to-edit.html>

What happens if remove( ) is never invoked on a session
bean?<http://techinterview.weebly.com/9/post/2008/08/what-happens-if-removeis-never-invoked-on-a-session-bean1.html>

How does a servlet communicate with a JSP
page?<http://techinterview.weebly.com/9/post/2008/08/how-does-a-servlet-communicate-with-a-jsp-page.html>

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?<http://techinterview.weebly.com/9/post/2008/08/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.html>

How EJB Invocation
happens?<http://techinterview.weebly.com/9/post/2008/08/how-ejb-invocation-happens1.html>

What is EJB 
QL?<http://techinterview.weebly.com/9/post/2008/08/what-is-ejb-ql1.html>

The EJB container implements the EJBHome and EJBObject classes. For every
request from a unique client, does the container create a separate instance
of the generated EJBHome and EJBObject
classes?<http://techinterview.weebly.com/9/post/2008/08/the-ejb-container-implements-the-ejbhome-and-ejbobject-classes-for-every-request-from-a-unique-client-does-the-container-create-a-separate-instance-of-the-generated-ejbhome-and-ejbobject-classes.html>

What are the call back methods in Entity
bean?<http://techinterview.weebly.com/9/post/2008/08/what-are-the-call-back-methods-in-entity-bean.html>

What are the services provided by
container?<http://techinterview.weebly.com/9/post/2008/08/what-are-the-services-provided-by-container.html>

What is deployment
descriptor?<http://techinterview.weebly.com/9/post/2008/08/what-is-deployment-descriptor.html>

Can a Session Bean be defined without ejbCreate()
method?<http://techinterview.weebly.com/9/post/2008/08/can-a-session-bean-be-defined-without-ejbcreate-method.html>

What is difference between EJB 1.1 and EJB
2.0?<http://techinterview.weebly.com/9/post/2008/08/what-is-difference-between-ejb-11-and-ejb-20.html>

Does stateless Session bean create() method contain any
parameters?<http://techinterview.weebly.com/9/post/2008/08/does-stateless-session-bean-create-method-contain-any-parameters.html>

Is Decorator an EJB design
pattern?<http://techinterview.weebly.com/9/post/2008/08/is-decorator-an-ejb-design-pattern.html>

Can i map more than one table in a
CMP?<http://techinterview.weebly.com/9/post/2008/08/can-i-map-more-than-one-table-in-a-cmp.html>
http://techinterview.weebly.com/ejb1.html
What is lazy 
loading?<http://techinterview.weebly.com/9/post/2008/08/what-is-lazy-loading.html>

What is the difference between EAR, JAR and WAR
file?<http://techinterview.weebly.com/9/post/2008/08/what-is-the-difference-between-ear-jar-and-war-file.html>

Why does EJB needs two interfaces(Home and Remote
Interface)<http://techinterview.weebly.com/9/post/2008/08/why-does-ejb-needs-two-interfaceshome-and-remote-interface.html>

What is the difference between ejbCreate() and
ejbPostCreate<http://techinterview.weebly.com/9/post/2008/08/what-is-the-difference-between-ejbcreate-and-ejbpostcreate.html>

How many EJB Objects are created for a
Bean?<http://techinterview.weebly.com/9/post/2008/08/how-many-ejb-objects-are-created-for-a-bean.html>

What are the optional clauses in EJB
QL?<http://techinterview.weebly.com/9/post/2008/08/what-are-the-optional-clauses-in-ejb-ql.html>

What is EJB 
server?<http://techinterview.weebly.com/9/post/2008/08/what-is-ejb-server.html>

What is EJB 
container?<http://techinterview.weebly.com/9/post/2008/08/what-is-ejb-container.html>

What is EJB client JAR
file?<http://techinterview.weebly.com/9/post/2008/08/what-is-ejb-client-jar-file.html>

What is Local client
view?<http://techinterview.weebly.com/9/post/2008/08/what-is-local-client-view.html>

What is Remote client
view?<http://techinterview.weebly.com/9/post/2008/08/what-is-remote-client-view.html>

Can I invoke Runtime.gc() in an
EJB?<http://techinterview.weebly.com/9/post/2008/08/can-i-invoke-runtimegc-in-an-ejb.html>

What is EJB 
architecture(components)?<http://techinterview.weebly.com/9/post/2008/08/what-is-ejb-architecturecomponents.html>

http://techinterview.weebly.com/ejb1.html

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