Which models are supported by JMS? Please, explain them.

JMS Interview Questions and Answers

(Continued from previous question...)

10. Which models are supported by JMS? Please, explain them.

Publish/subscribe (pub/sub). This model allows a client (publisher) to send messages to a JMS topic. These messages are retrieved by other clients (subscribers) (it may happen so that a topic has no subscribers) asynchronously. Pub/sub model requires a broker distributing messages to different consumers.

(Continued on next question...)

Other Interview Questions

• What is JMS?
• Must I place all my class files in the WEB-INF folder and all JSP's outside?
• What type messaging is provided by JMS?
• How may messaging models do JMS provide for and what are they?
• What is the point-to-point model in JMS?
• What are the advantages of JMS?
• What is the publish-and-subscribe model in JMS?
• What is JMS administered object?
• What is publish/subscribe messaging?
• Which models are supported by JMS? Please, explain them.
• What are the different parts of a JMS message ?
• What is the main parts of JMS applications?
• What Is Messaging?
• What is the Role of the JMS Provider?
• What is the diffrence between Java Mail and JMS Queue
• Does JMS specification define transactions? Queue
• What is synchronous messaging? Queue
• What is asynchronous messaging? Queue
• How does a typical client perform the communication? Queue
• 20. What is JMS session? Queue
• What is the use of JMS? In which situations we are using JMS? Can we send message from one server to another server using JMS? Queue
• What is the difference between durable and non-durable subscriptions?
• What is the difference between Message producer and Message consumer?
• What is JMS application ?
• What type messaging is provided by JMS ?
• How JMS is different from RPC?
• What Is the JMS API?
• What is JMS client ?
• Give an example of using the point-to-point model
• What is Producer and Consumer?
• Can JMS utilities automatically re-establish a connection if one side of the communication link (i.e. an application that's sending/receiving messages) goes down and is restarted? Are there APIs to help detect that the other side broke a connection (went down)?
• What is the Role of the JMS Provider?
• What is JMS providerr?
• What is Byte Message ?
• What is the difference between Byte Message and Stream Message?
• What are the advantages of JMS?
• Are you aware of any major JMS products available in the market?
• What are the different types of messages available in the JMS API?
• What are the different messaging paradigms JMS supports?
• What is the difference between topic and queue?
• When Can You Use the JMS API?
• How Does the JMS API Work with the J2EE Platform?
• What is the role of JMS in enterprise solution development?
• What is the use of Message object?
• What is the basic difference between Publish Subscribe model and P2P model?
• What is the use of BytesMessage?
• What is the use of StreamMessage?
• What is the use of TextMessage?
• Why do the JMS dbms_aqadm.add_subscriber and dbms_aqadm.remove_subscriber calls sometimes hang when there are concurrent enqueues or dequeues happening on the same queue to which these calls are issued?
• Why do the TopicSession.createDurableSubscriber and TopicSession.unubscribe calls raise JMSException with the message "ORA - 4020 - deadlock detected while trying to lock object"?
• Why doesn't AQ_ADMINISTRATOR_ROLE or AQ_USER_ROLE always work for AQ applications using Java/JMS API?
• Why do I get java.security.AccessControlException when using JMS MessageListeners from Java stored procedures inside Oracle8i JServer?
• What is the use of ObjectMessage?
• What is the use of MapMessage?
• What is the difference between BytesMessage and StreamMessage?
• What is object message ?
• What is text message?
• What is Map message?
• What is the difference between queue and topic ?
• What are the three components of a Message ?
• What is the difference between queue and topic?
• What are the types of messaging?
• What is the difference between Point to Point and Publish/Subscribe
• Why doesn’t the JMS API provide end-to-end synchronous message delivery and notification of delivery?
• What are the core JMS-related objects required for each JMS-enabled application?
• How does the Application server handle the JMS Connection?
• What is Stream Message ?