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Topic Summary

Posted by nithyasubramanian
 - Jan 16, 2009, 02:45 AM
Websphere Interview Questions

1)   Explain about web sphere?
The word web sphere popularly refers to IBM middleware technology products. Web sphere is known for its turn key operation in e business applications. It has run time components and tools which can help in creating applications which run on WAS. WAS refers to web sphere application server.

2)   Explain about web sphere commerce?
IBM web sphere commerce has a single platform which offers complete ecommerce solutions to developers. It can be very productive if you are planning to do business with consumers, business and indirectly through channel partners. This can be used to perform business with consumers, business and channel partners altogether.

3)   Detail about the architecture of web sphere?
Web Sphere is built on three main components they are
•   Database
•   J2EE application server
•   A web server
The databases which it supports are
•   DB2
•   Oracle
•   Cloudscape
Application server is IBMWAS and the supported web servers are
•   IBM server
•   Microsoft IIS
•   Sun web server

4)   State some of the features present in web sphere?
Some of the features which are present in web sphere are: -
•   Order management
•   Web sphere commerce accelerator
•   Analytical and business intelligence
•   Open standards such as Java, EJB, etc
•   Web sphere commerce payments and customer care, etc

5)   Explain about IBM Web Sphere edge server?
Web sphere edge server is used to improve the performance of web based systems. It can be used as forward or proxy server. Basically four components are present in the web sphere they are Network dispatcher, Caching proxy, Content distribution and application service at the edge.

6)    Explain about extended deployment?
Web sphere application server extended deployment increases the functionality of the server in two main areas they are manageability and performance. Dynamic virtualization between servers is possible with the help of XD. A stand alone distributed cache was added to it under the performance header, it is known as Object Grid.

7)   Explain about the security features present in WAS?
Security model for web sphere is primarily based on JAVA EE security model. It also depends upon the operating system. User authentication and authorization mechanisms are also provided in WAS. Light weight third party authentication mechanism is the main security feature present in WAS.

8)   Explain about asymmetric clustering?
Asymmetric clustering applications are primarily used in electronic trading systems employed in banks. Some of the features are, partitions can be declared during run time and are usually run on a single cluster at a time. Work specific to a particular can be routed to that cluster.

9)   Explain the various Administrator benefits using Web sphere?
Web sphere almost reduces the work of server administrator as he can manage load on servers efficiently without any hassles. It also gives him flexibility to divide the load and applications among different server farms. He can also predict about the incoming load on servers. Email alerts, restart options, memory leak detection, etc.

10)    Explain about caching proxy of IBM Web sphere Edge sphere?
A caching proxy can be configured in forward direction or as a proxy. Content requested by the user is cached by edge before sending or adhering to the query. Page fragments arising from JSP or servlets are cached by Edge and the caching process is slow. Performance and scalability of J2EE applications can be increased by edge.

11)    Explain about the network deployment feature present in WAS?
Managing singletons will be a thing of the past and it also provides hot recovery of singletons which makes you forget about your GC collected singletons. Transaction logs can stored on a shared file system. For clustering run time operations deployment manager`s role was eliminated. J2EE failover support and cell configuration support is also present.

12)    Explain about IBM web sphere integration developer?
Web sphere integration developer provides an IDE to build applications based on service oriented architecture. Web sphere process server and web sphere ESB were built with WID. WID was built with RAD Eclipse based technology.

13)    Explain about compute Grid?
Compute grid is also known as Web sphere batch. Web sphere extended deployment offers a Java batch processing system called as Compute Grid. This forms an additional feature to Web sphere network environment. Various features are provided which help a developer to create, manage and execute batch jobs. Job scheduler, xJCL, batch container and batch programming controller.

14)    Explain about web sphere MQ Real time transport?
This feature is very useful in instant messaging across different clients through intranet and internet. This supports high volume and high performance across different clients. It uses the concept of light weight transport which is again based on IP rather than the queue process.

15)    Explain about Web sphere MQ JMS Provider?
Web sphere MQ and Web Sphere Business integration manager Broker are very useful in providing Java messaging services to wide range of clients (publisher -subscribe, point to point). Java classes are chiefly responsible for translating the API calls to API`s defined by web sphere. It is very useful to have knowledge of Web sphere MQ for proper configuration.

16)    Explain the attribute CHANNEL in web sphere MQ?
CHANNEL specifies the name of the server connection channel. Generally this is Web Sphere MQ network abstraction. The default standard used by CHANNEL is SVRCONN which is the server connection channel. This server is generally used to communicate to the queue manager by the client.

17)    Is the naming of connection factory independent of the name specified by JMS client?
Yes, the naming of connection factory is independent of the name specified by JMS client. This is made possible by WAS (Web sphere application server) with its resource references. It isolates the application from object names. This feature is important because it gives us the flexibility to change the administered object without changing the JMS client code.
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