IMS Interview Questions and Answers - DoAnswers.com

Information Management System. Composed of two systems: a Database Manager (IMS DB) and a Transaction Manager (IMS TM). IMS DB: Information Management System Database Manager. IBM�s venerable (introduced in 1968) large system hierarchical DBMS. In casual conversation, either IMS1 DB or IMS TM may be referred to simply as IMS without anyone complaining. Following the introduction of DB2, it was assumed, both inside and outside IBM, that IMS DB would die a slow death as DB2�s performance improved to approach that of IMS DB. But, it never happened, mainly because of the number of major IMS-based applications at large organizations worldwide. Once IBM realized this, a major effort was made to keep both IMS DB and IMS TM up to date with the latest trends, such as Web enablement, though nobody proposed making it into a relational DBMS

IMS Interviews are getting tough these days as the technology grows faster. To get through the IMS interview one needs to update him/herself in a regular manner. Having said that, just before the interview, it is very important to have a quick glance of the reputed IMS questions and answers to make yourself comfortable during the interview process. This is where DoAnswers.com helps you in renewing yourself on IMS and various other technologies interview preparation.

used to generate DBDs. The statements in DBDGEN process are PRINT NOGEN, DBD, DATASET, SEGM, FIELD, DBDGEN, FINISH, END

Message Format service , Used to format messages that will be transmitted to and from display screens.

Procopt parameter specifies PROCESSING OPTIONS that define the type of processing that can be performed on a segment. ex: K, G, L, LS, A ,AS, I, IS. procopt=k---means , the segment is key sensitive procopt=g- the segment is data sensitive (like read only) L- Load mode , means we can load data base from scratch A- Get, Insert, Delete, Replace- means it allows the program to issue all those calls I-insert mode. That means only insert calls with insert mode can be issued

DBD stands for DATABASE DEFINITION. It is to define segements,key fields and access methods used for an IMS Database.

A line that starts at the root and passes thru the inter mediate levels in the hierarchy and ends at the a segment at the bottom of the hierarchy is called the Hierarchy path.

A Field that DL/I uses to maintain the segments in the ascending order is called the key field

PSB stands for PROGRAM SPECIFICATION BLOCK.It is made up of one or more pcb's.It also defines the database used by the application program.

The segment at the top of the Hierarchy, which is not a child to a segment is called the Root.

A segment is the smallest unit of information that Dl/I uses when working with information in the database