DD statement is used in JCL is used to identify the source of input and the placement of output information. EXEC statement holds the job step program or procedure information. Both libraries specifies the private libraries that should be searched before the default system libraries does in order to locate a program to be executed. Procedure can be used to achieve parallel execution of a program using multiple input files.
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JCL is mainly handling all the mainframe related job, is able to define one job, control the same for ensuring proper logical execution of define programs and helping to get desired output as schedule by that specific job. JCL is normally designed in such a way so that it may contain multiple steps, and every step holding the business logic to be executed or some specific define task which needs to be complete. JCL normally links all the defined programs and input or output files in the backend job batch environment.
It is true that every interview is different as per the different job profiles. Here, we have prepared the important JCL Interview Questions and Answers which will help you get success in your interview. These interview questions are divided into two parts are as follows:. Please note, those are overridden not overwritten. Please find below code snippet which defines references of multiple version of GDG:. So return code 4 of any kind of JCL job can be considered as empty file choosing as input for the job.
Normally developer managing the same in a different way, if the return code came as 4, then the job is automatically terminated, not require to process further for the next executable logic. As empty file normally not require to process further as it will take minimum space in the mainframe system, and it is well aware that mainframe system cost is too high, so handling this kind of error will be a require expertness for any mainframe or JCL job developer.
It can be communicated by below three approaches:. After sending require data to the Cobol program every JCL jobs are waiting for returning response from that program and deciding the JOB further process. Answer: Yes possible. Some popular test cases in the current IT industry. You may also look at the following articles to learn more —.
JCL Interview Questions & Answers
These 41 solved JCL questions will help you prepare for technical interviews and online selection tests conducted during campus placement for freshers and job interviews for professionals. After reading these tricky JCL questions , you can easily attempt the objective type and multiple choice type questions on JCL. What is JCL? Identification Division: Act as introductory part to JCL program name, author,date etc no interacting code.
JCL Interview Questions with Answers
Here is a list of most frequently asked JCL interview questions and their answers. JCL is a scripting language used on IBM mainframe operating system to instruct the system for the batch job. It is a set of statements that you code to tell the operating system about the task you want to perform. Sometimes this set of statements is quite large, but most jobs can be run using a minimal subset. JCL statements tell OS where to find the required input, how to process that input, and what to do with the resulting output. Act as introductory part to JCL.