21.What is a Replication Domain?

A replication domain is a collection of replicator entry (or replicator) instances used by clusters or individual servers within a cell.
All replicators within a replication domain connect with each other, forming a network of replicators.
The default is to define a replication domain for a cluster when creating the cluster. However, replication domains can span across clusters.

Global default settings apply to all replication use for a given replication domain across a cell. Most default settings tune and control the behavior of replicator entries in managed servers across the cell. Such default settings control the use of encryption or the serialization and transferring of objects. Some default settings tune and control how specific WebSphere Application Server functions (for example, session manager and dynamic caching) leverage replication, such as session use of partitions.

For situations that require settings values other than the default, change the values for a given replication domain on the Internal Replication Domains page. Settings include various resource allocation, replication strategies (such as grouping or partitioning) and methods, as well as some security related items.

If you are using replication for HttpSession failover, you might also need to filter where the session replicates. For example, only replicate to two places out of many. The global default settings define the partition size or number of groups and the session manager settings define the groups to which a particular instance belongs.

Filtering is less important if you are using replication to distribute information on invalid data and actual cached data maintained by a Web container's dynamic caching. Replication does not occur for failover as much as for data synchronization across a cluster or cell when you likely want to avoid expensive costs for generating data potentially needed across those various servers.

22.What are the SDK versions supported on WAS 4, 4.X, 5, 5.X, 6, 6.X and 7?

23.How to check WAS Version / Build Level?

/WAS_HOME/bin/versionInfo.sh

24.What is the Default SOAP port number?

8879

25.What do you understand by the term JMS?

Java Message Services, JMS, is Sun's standard API for message queuing systems. Message queuing systems form the front-line interface between businesses (B2B) and for Enterprise Application Integration (EAI). As such, message queuing systems are often called "middleware" because they operate in the middle -- between other systems and between enterprises.

26.What are the different JMS providers available in different WAS versions?

WAS 6
WebSphere Embedded Messaging
WebSphere MQ
Generic
V5 Default Messaging

WAS 5
Generic JMS Provider
WebSphere JMS Provider
WebSphere MQ JMS Provider

27.What are console user roles available in WAS 5 and 6?

WAS 5 and WAS 6
Administrator
Configurator
Operator
Monitor

28.What are the authentication mechanisms available for Global Security in WAS?

• LTPA (Light weight Third Party Application)
• WAM (Simple WebSphere Authentication Mechanism)

29.What are the User Registries supported by WebSphere for Global Security?

Local OS, LDAP and Custom User Registry

30.How to change the JVM/Process/Diagnostic Trace log file locations for any JVM?

• Login to the Admin Console.

31.What are the different types of logs available in WebSphere?

Diagnostic Trace
JVM Logs
Process Logs
IBM Service Logs

32.Explain what is Web-Sphere?

Web-sphere is a tool based on Java and developed by IBM, to manage and create websites. Web-sphere is often used to build interactive web-oriented applications that support business functions required for e-commerce, it integrates all the data across different operating system and applications.

33.Mention what are the important component of Web-Sphere?

Important components of Web-Sphere are

• WebSphere Application Server or WAS: It connects the website users with Java servlets
• Data–Server:For data persistence
• Web–server: It provides the service of HTTP

34.Mention some of the features available in Web-sphere?

Some of the features available in Web-sphere includes

• It supports the servlet/JSP container functionality that runs on top of HTTP
• It supports HTTP servers as IBM HTTP server, Netscape iPlanet server, and MS IIS
• It supports Java Server Pages, HTML pages, Servlets and XML
• It supports EJB component model and Workload Management.

35.Mention how does a WebSphere or any Application server clustering work?

A WebSphere’s web server plugin component routes requests to WebSphere cluster web containers. If there is a communication failure with a particular cluster member, it will mark that member down and start routing all requests to the remaining cluster member till the original is available.

36.Mention what type of files are required to deploy an application into Websphere?

WAR or EAR files are required to deploy an application into Web-sphere.

37.Mention what is asymmetric clustering in Web-sphere?

In asymmetric clustering, the partition can be defined dynamically and runs on a single cluster at a time. The task which is particular to an appropriate cluster can be routed to that cluster. Usually, clustering is used by banks.

38.Explain what is node, node agent and node groups?

• Node:It is a logical grouping of server processes maintained by WebSphere and that share common configuration and operational control
• Nodeagent:Each node has a nodeagent that works along with the deployment manager to manage administration processes. It acts as a mediator between the node and deployment manager
• Node Group:A node group is a grouping of nodes within a cell that have same capabilities

39.Explain what is a cell in WebSphere?

A cell is referred as a grouping of nodes into a single administrative domain.
A cell can have multiple nodes which are all managed from a single point.

40.Mention what are the default ports you use to use WebSphere Application Sphere?

The default ports you use are HTTP: 9080 and HTTP: 9443