Introduction on SORTJOIN In the world of mainframe computing, JCL (Job Control Language) plays a crucial role in defining and managing batch jobs. One of the fundamental tasks in data processing is sorting, and JCL offers several powerful sorting techniques. Among these techniques, SORTJOIN stands out as an efficient method for merging and sorting data … Read more
Introduction on PL/1 Important Questions PL/1 (Programming Language 1) is a high-level programming language that was initially designed for scientific, engineering, and business applications. Developed in the 1960s, PL/1 combines features from several programming languages, making it a versatile and powerful choice for various domains. In this blog, we will explore some of the most … Read more
REXX (Restructured Extended Executor) is a programming language that was developed in the late 1970s. It is a high-level programming language that is easy to learn and has a simple syntax. It is mainly used on IBM mainframe computers, but it can also be used on other platforms like Windows, Linux, and macOS. In this … Read more
Most Mainframe interviews comprises of questions around the real time projects you worked in the past, the challenges you faced and how you offered solutions for critical problems. In this article I would like to share some of the important Mainframe interview questions. Mainframe Interview Questions and Answers 1. Explain DRDA ? DRDA represents Distributed … Read more
MQSeries Techniques Queue Choice Message Class Waiting for Messages Automatically starting MQSeries programs Unit Of Work Size Example programs Queue choice For any MQSeries application you need to decide what MQSeries queues to use, and which classes of message you require. It is recommended that applications are not written with hard coded queue or queue … Read more
The API supported by MQSeries is known as the Message Queue Interface (MQI). There are only 11MQI function calls in total, these allow programs to: Connect to, and disconnect from, queue managers Open and close queues Open, put a message on a queue, and close the queue Put messages on queues Get messages from a … Read more
A brief introduction to MQ Series As a whole MQ Series enables messages to be exchanged, either synchronously or asynchronously, between application programs running on one or more target systems. Messages travelling between programs are stored on message queues, which are under the control of a service provider called a queue manager. In general, a … Read more
How to use JCL Cond Parameters to skip a step in a Job Cond Parameters are used in Job steps to route the job execution of each steps or a particular step. For example if you want to skip a particular step based on previous steps outcome, using a COND parameter is a good solution. … Read more
CICS Commands If you have already compiled your BMS Macro by running JCL and it has created the physical and symbolic map, following screen shows how to perform other steps needed for a CICS transaction. Below are some of the hands on screen shots to learn CICS basic screens and commands. Define CICS MAP in … Read more
