COBOL Module on Z/OS - Mainframe [Beginner to Expert]

Explore COBOL subprograms on Z/OS, covering static and dynamic calls, call by reference, and call by value, with practical examples and terminology.

Learn to implement cobol subprograms on z/os, passing jcl data to programs via parm parameters, and compare static and dynamic calls, including by reference and by content.

Master COBOL arrays and occurs, including single-dimensional arrays, subscript and index usage, and perform linear and binary search to retrieve data on Z/OS mainframes.

Explain linear versus binary search on arrays, noting unsorted data for linear search, sorted order for binary search, index handling, and how binary search speeds up by halving search space.

Learn COBOL file handling on z/OS, including environment division setup, file control, and open modes, and perform sequential, random, and dynamic reads and writes with copy books.

Demonstrates reading data from a sequential file in COBOL on z/OS, covering file control and environment division, and displaying records while explaining select and file-section concepts.

Demonstrates reading data from a sequential input file and writing selected fields into an ESDS output file, detailing file declarations, copybook structures, open/read/write logic, and end-of-file handling.

Explore reading data from a sequential file, writing into multiple files, and updating or rewriting records in COBOL on z/OS, including PS and SDS file differences.

Learn to read data from a sequential input file and write it to a csv output, handling primary keys, duplicates, and file status feedback in cobol on z/os.

Learn how to perform random, dynamic, and sequential reads in COBOL on z/OS, update and delete records, and use copy books and file control for mainframe data management.

Learn how to view comp data stored in comp type fields by creating a record structure, using a copy book, and reading it via the file manager.

Explore COBOL assignments on z/os, learning which divisions are mandatory or optional, including a practice program that omits environment and data divisions and prints a welcome message to the spool.

Learn to build a complete COBOL program for assignment two on z/OS, including all divisions and literals, while exploring stop run vs exit program and documenting common errors.

Declare and initialize variables in the COBOL data division, fix syntax errors, and print labeled outputs with headers and star-filled lines for assignment three.

Learn to declare and initialize COBOL variables for phone number, full name, and address using figurative constants in the data division, then display results on the spool.

Explore assignment five in the COBOL z/OS module, declare a record for 50,000 students, and print an aligned report with labeled student name, address, and subject fields using accept.

Learn to process positive and negative numbers in COBOL, retrieve data from SQL via session control card or parm parameter, and display values with their sign using JCL.

Move data from an old record structure to a new one using move corresponding in COBOL, display both records, and print customer id, address, and Aadhaar card fields.

Develop a COBOL program for a z/OS mainframe that prints an 80-star header, outputs student details and three subjects, and computes total and average using arithmetic operators to assign pass.

Apply if conditions in a COBOL program on Z/OS to collect banking employee data via run JCL and SQL, then calculate the latest salary with a rating-based hike, without loops.

Learn to calculate electricity bills in a cobol z/os module using tiered pricing for 0–50, 51–100, and above 100 units, with ₹100 up to 100 units and ₹200 beyond.

Write a COBOL program to determine pass or fail using three subjects (accounting, law, taxation): 50 per subject and average of 65 or above, with subject-specific failure messages.