Answer:- WebSphere MQ is an application program that allows you to communicate with each other using messages and queues. This form of communication is referred as commercial messaging. There are two methods for application to communicate, Request/Response and Fire & Forget.

Answer:- QueueManager is the important component of WebSphere MQ. It is accountable for storing and routing messages to other queue manager within MQ, and it also communicate with the outside world.

Answer:- The extended deployment in WebSphere leverages enhanced qualities of service with features optimizing IT resources. It spans three areas WebSphere Virtual Enterprise WebSphere eXtreme Scale Compute Grid

Answer:- The WebSphere edge server is used to enhance the performance of web based systems. It can be used as a proxy server. There are basically four components in the web sphere they are caching proxy, content distribution, network dispatcher and application server at the edge.

Answer:- A caching proxy can be configured in forward direction or as a proxy. When user requests the content, it is cached by the edge before sending or following to the query. Page fragments arising from Servlets or JSP are cached by Edge, and the Caching process becomes Slow. Performance and scalability can be optimized by edge.

Answer:- Caching server provides functionality like • Reverse proxy and content based routing • Integration with servlet caching and dynamic content caching

Answer:- Websphere MQ programming APIs include AMI (Application Messaging Interface) JMS (Java Message Service) MQI (Message Queue Interface)

Answer:- Class loader policy, JAAS authentication aliases and virtual host information can enhance EARs support apart from EARs support and shared libraries.

Answer:- In Websphere application can be deployed in three ways Copy files directly to deploy application folder in websphere Use websphere specific ant tasks create automated scripts for deploying application Via administration console

Answer:- WAS (WebServer Application Server) stores all the configuration in one central location referred as “Master Repository”. The sync ensures the configuration in both local and master repositories are same and in sync.

Answer:- Connecting pool is a cache of database connections maintained so that connection can be re-used when future requests to the database are required. If all the connections are occupied, a new connection is created and is added to the pool.

Answer:- Websphere is focused more on connectivity, integration, and web services. It has better performance, rich implementation of J2EE, more extensive integration and transaction management compare to Weblogic. Weblogic has default transaction attributes as supports, while websphere does not have such type of the default transaction attribute.

Answer:- Nginx is a web server and a reverse proxy server for HTTP, HTTPS, SMTP, POP3 and IMAP protocols.

Answer:- Special features of the Nginx server includes • Reverse proxy/ L7 Load Balancer • Embedded Perl interpreter • On the fly binary upgrade • Useful for re-writing URLs and awesome PCRE support