What is the difference between component buffer and data buffer?

Component buffer contains all the data of the active component.

Data buffer contains the data other than the data in the component buffer (Data of other records)

What is PIA and what are its components?

It is n-tier architecture. We have client, web server, application server and Database server. We have jolt and tuxedo. We have WSL, WSH, JSL, JSH, QUEUES and services.

In database server we have system tables, peopletools tables and application tables.

Where do u set the web server cache?

webserver configuration.properties file

Difference between Two tier architecture and Three tier architecture?

a. 1 tier application: All the processing is done on one machines and number of clients are attached to this machine (mainframe applications)

b. 2 tier application: Clients and data base on different machines. Clients are thick clients i.e.  processing is done at client side.Application layer is on Clients.

c. 3 tier application. Client are partially thick.Apart from that there are two more layers application layer and database layer.


d. 4 tier application: Some clients may be totally non thick clients some clients may be partially thick and further there are 3 layers web layer, application layer and database layer.