arunkumar
Number of posts : 209
Age : 38
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Registration date : 2008-10-21
 |  Subject: Latest Technical Interview Answers - 10  Mon Nov 24, 2008 7:17 am | |
| Latest Technical Interview Answers - 10
What are the core JMS-related objects required for each JMS-enabled application?
Posted:
Each JMS-enabled client must establish the following: • A connection object provided by the JMS server (the message broker) • Within a connection, one or more sessions, which provide a context for message sending and receiving • Within a session, either a queue or topic object representing the destination (the message staging area) within the message broker • Within [...]
What are the types of messaging?
Posted:
There are two kinds of Messaging. Synchronous Messaging: Synchronous messaging involves a client that waits for the server to respond to a message. Asynchronous Messaging: Asynchronous messaging involves a client that does not wait for a message from the server. An event is used to trigger a message from a server.
What is MDB and What is the special feature of that?
Posted:
MDB is Message driven bean, which very much resembles the Stateless session bean. The incoming and out going messages can be handled by the Message driven bean. The ability to communicate asynchronously is the special feature about the Message driven bean.
How is a java object message delivered to a non-java Client?
Posted:
It is according to the specification that the message sent should be received in the same format. A non-java client cannot receive a message in the form of java object. The provider in between handles the conversion of the data type and the message is transferred to the other end.
What are the various message types supported by JMS?
Posted:
Stream Messages ? Group of Java Primitives Map Messages ? Name Value Pairs. Name being a string& Value being a java primitive Text Messages ? String messages (since being widely used a separate messaging Type has been supported) Object Messages ? Group of serialize able java object Bytes Message ? Stream of uninterrupted bytes
Why doesn’t the JMS API provide end-to-end synchronous message delivery and notification of delivery?
Posted:
Some messaging systems provide synchronous delivery to destinations as a mechanism for implementing reliable applications. Some systems provide clients with various forms of delivery notification so that the clients can detect dropped or ignored messages. This is not the model defined by the JMS API. JMS API messaging provides guaranteed delivery via the once-and-only-once delivery semantics [...]
Give an example of using the publish/subscribe model.
Posted:
JMS can be used to broadcast shutdown messages to clients connected to the Weblogic server on a module wise basis. If an application has six modules, each module behaves like a subscriber to a named topic on the server.
What is the advantage of persistent message delivery compared to nonpersistent delivery?
Posted:
If the JMS server experiences a failure, for example, a power outage, any message that it is holding in primary storage potentially could be lost. With persistent storage, the JMS server logs every message to secondary storage. (The logging occurs on the front end, that is, as part of handling the send operation from the [...]
Can two different JMS services talk to each other? For instance, if A and B are two different JMS providers, can Provider A send messages directly to Provider B? If not, then can a subscriber to Provider A act as a publisher to Provider B?
Posted:
The answers are no to the first question and yes to the second. The JMS specification does not require that one JMS provider be able to send messages directly to another provider. However, the specification does require that a JMS client must be able to accept a message created by a different JMS provider, so [...]
Explain about core validation?
Posted:
During the process of XML validation two processes are followed which are 1) Reference validation and 2) Signature validation Record digest value is used to verify digital signature. In signature validation a process called Canonicalization is used, in this key info is used to verify the signature.
Explain about XML Canonicalization?
Posted:
Often it happens that documents are identical in many different ways either logical of statistical. It becomes a major problem when you try to sign a digital signature on two identical documents, to eliminate this problem you have to use Canonicalization which helps people in identifying two similar documents with similar digital signature. Similar documents [...]
Explain about XML signature?
Posted:
XML signature is recommended by w3c. It acts as a digital signature for XML documents. This technology is used by various technologies such as SAML, SOAP, etc. You can use this technology whenever you can access a specific XML document in a URL. If the signature is contained outside the document then it is called [...]
State some features of XQuery.
Posted:
Some of the features which are present in XQuery language are as follows: - 1) Logical and physical data independence 2) Declarative 3) High level 4) Side effect free 5) Strongly typed language
Explain about XQuery?
Posted:
Xquery is a useful query language which is designed to query XML data and it is very useful in making changes to query. Its subset is Xpath. This XQuery is formed from the experts of w3c. This facilitates extraction of data from many different databases. This can be rightly said that in future it will [...]
Describe about the syntax rules which form the XML documents?
Posted:
Some of the basic syntax rules which are to be implemented are 1) XML documents should have a root element 2) They should have a closing tag 3) Make sure that you type exact case, as these documents are case sensitive. 4) These elements should be properly nested 5) Attribute elements must be quoted correctly.
State and explain about XML encoding errors?
Posted:
When loading an XML document you have two kinds of errors they are 1) Invalid character found 2) Switch from current encoding You would obtain an invalid character found error if your XML document contains non ASCII characters. When your document contains ASCII characters make sure that you save the document as ASCII characters with encoding Switch from current [...]
How do you display XML with XSLT?
Posted:
XSLT is the recommended style sheet for XML and it is very popular. To display XML with XSLT one has to convert XML into HTML before displaying it in the browser. Different browsers interpret XSLT in different ways which makes it a necessary to amend changes to XSLT on the server.
Explain about XML namespaces?
Posted:
Namespaces are guided by the guidelines of w3c. These are used to uniquely identify the named elements and attributes of an XML document. As XML supports human interpreted language and structure it is necessary for namespaces to differentiate different elements present in an XML document. It is declared using XML attribute xmlns and the value [...]
Explain about DOM interface?
Posted:
DOM interface and its specifications are modulated by world wide consortium. DOM allows the user to transfer the entire content of a document into an object. In DOM the entire package is loaded into the memory and then it is modulated into nodes of tree after which the entire document is converted into an object [...]
Explain about XML data binding?
Posted:
XML data binding allows the user to access the information in XML format rather than in the format of DOM. Data is referred and stored in the computer memory as an object in the form of an XML document. Some information requires different approach to store it in the format of an object. As the [...] | |
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