IBM mainframe JCL interview questions and answers

The interview process is an important milestone in any job search, and the ability to answer tough questions can be the deciding factor between getting the job and being passed over. For those in the IT field, sorting interview questions in JCL (Job Control Language) can be especially challenging. Knowing the right questions to ask and the techniques to use to answer them is essential to success. In this blog post, we will discuss the key components of sorting interview questions in JCL, gaining insight into the complex workings of the language and the different techniques to use when tackling interview questions. We’ll review the basics of JCL and then explore the nuances of the language, such as its structure and syntax. You’ll also learn about the different sorting techniques and strategies to employ, as well as the best practices for sorting interview questions. By the end of this post, you’ll have a better understanding of the language and the different methods for sorting interview questions in JCL.

JCL Interview Questions for Freshers
  • What are the benefits of using JCL? …
  • Explain different types of Job control statements or JCL statements. …
  • State the difference between positional parameter and keyword parameter in JCL. …
  • What are different parameters for DD (Data Definition) statement?

JCL – SORT CARDS – Practical Video – Mainframe Wednesday Talks # 6

The physical dataset name of a recently created or existing dataset is referred to by the DSN parameter. The DSN value can consist of sub-names that range in length from one to eight characters, are separated by periods, and have a total of 44 characters (alphanumeric) in length. What is use of DISP parameter in DD statement?.

The JOB’s symbolic parameters can be used to specify the JCL’s varying parts, while the PROC’s symbolic parameters can be used to specify the JCL’s static parts. For instance, the varying portion of the file name can be coded in JCL using a symbolic parameter if it changes for each JOB that uses the PROC.

when it is created with the definition DISP = (NEW,KEEP) When the LIMIT is reached for a GDG, the least recent generation is uncataloged if the GDG base had been defined with the NOEMPTY parameter. All generations are uncataloged when coded with EMPTY. How can a GDG base be created in a JCL. What makes the EMPTY and SCRATCH parameters different when defining or changing the GDG base?

The Data Control Block (DCB) parameter describes a dataset’s physical properties. For datasets that are freshly created in the job step, this parameter is necessary. LRECL is a dataset’s measure of the length of each record. RECFM is the record format of the dataset. How you will define a temporary dataset in JCL?.

The dataset’s status and disposition upon normal and abnormal completion are described by the DISP parameter at the end of the job step. Only when the dataset is created and deleted in the same job step (like temporary datasets) is DISP not required in a DD statement. What does the SPACE parameter in the DD statement do? Syntax DISP = (status, normal-disposition, abnormal-disposition)

JCL Interview Questions on Sort (Slideshare)

sort interview questions in jcl

A controlcard is used to store date fields, VSAM file definitions, etc. and can be a member of a pds or a sequential dataset. Because you can’t use it in a procedure, you use a controlcard. Typically, you’ll call a Proc from your JCL and specify the dataset called controlcard.

STEPLIB: Used to specify a system library or a private library from which to retrieve include groups and jcl procedures. The order of the library names on the jcllib statements, the order in which jcl procedures search for them, and whether or not groups referenced by this job are included.

JCL Interview Questions – For Freshers

Job Control Language (JCL) is a programming language that allows you to control how your computer works. On the IBM mainframe operating system, JCL is a scripting language used to command the system for batch jobs. Its a sequence of statements you write to tell the operating system what you want to do. This set of statements can be fairly vast at times, but most jobs can be completed with only a small portion of it.


How do I sort a file in JCL?

The sorting orders can be either Ascending or descending.
  1. Syntax:
  2. Example 1: SORTing a record in an input file based on a single field
  4. SORT JCL:
  6. Explanation:
  7. Sort Field: 1,6,CH,A – The field began at column 1 and is 6 characters long.
  8. Example 2: SORTing a record from an input file using two fields

What is DD * in JCL?

Reusable JCL collection. When a program or procedure runs, the data sets that it uses are defined by data definition (DD) statements. Each data set that is used or created during a job step requires its own DD statement to be programmed. DD statements’ order within a job step is typically not important.

What does /* do in JCL?

(7) /* marks the end of in stream data. Except for stream data, all JCL statements begin with // Before and after the JOB, EXEC, and DD keywords, there should be at least one space, and there should be no spaces in the remaining portion of the statement.

Which utility is used as dummy utility?

IEFBR14 is not an operation utility, so which utility is used as a dummy utility? Used to return control to user and terminate. Typically, it is used to create empty datasets or remove ones that already exist.

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