Learn Cobol - 9 Code Examples & CST Typing Practice Test
COBOL (Common Business-Oriented Language) is a high-level, English-like programming language designed for business applications, financial systems, batch processing, and large-scale enterprise data operations. Known for reliability, readability, and long-term stability.
Learn COBOL with Real Code Examples
Updated Nov 19, 2025
Learning Path
Start with basic COBOL syntax and divisions
Learn PIC data types and file handling
Practice sequential & indexed file operations
Study batch processing with JCL
Explore enterprise-level systems and DB2 integration
Skill Improvement Plan
Week 1: Syntax & divisions
Week 2: File input/output
Week 3: Batch processing & JCL
Week 4: Complex business logic & DB2
Interview Questions
Explain COBOL's four divisions.
What is the PIC clause used for?
Difference between sequential and indexed files?
How does PERFORM differ from CALL?
How do you handle batch input/output?
Cheat Sheet
IDENTIFICATION DIVISION.
DATA DIVISION.
PROCEDURE DIVISION.
PERFORM UNTIL condition ... END-PERFORM.
MOVE value TO variable.
Books
Murach's Mainframe COBOL
COBOL for the 21st Century
Teach Yourself COBOL in 21 Days
Tutorials
COBOL programming for beginners
Mainframe COBOL & JCL tutorials
COBOL file processing guides
Official Docs
ISO COBOL standards
IBM Enterprise COBOL documentation
GnuCOBOL user manual
Community Links
COBOL/Mainframe Reddit communities
IBM Developer forums
StackOverflow COBOL tag
Community Support
COBOL programming communities
Mainframe developer groups
Reddit r/mainframe
StackOverflow COBOL tag
IBM Developer forums
Frequently Asked Questions about Cobol
What is Cobol?
COBOL (Common Business-Oriented Language) is a high-level, English-like programming language designed for business applications, financial systems, batch processing, and large-scale enterprise data operations. Known for reliability, readability, and long-term stability.
What are the primary use cases for Cobol?
Banking and financial transaction systems. Payroll and HR systems. Insurance policy and claims processing. Government mainframe workloads. Batch data processing. Large-scale enterprise reporting
What are the strengths of Cobol?
Highly readable and self-documenting. Rock-solid stability for mission-critical systems. Excellent for large-scale batch processing. Unmatched legacy compatibility. Decades of proven reliability in finance/government
What are the limitations of Cobol?
Verbose syntax compared to modern languages. Not suited for modern web/app development. Small pool of new COBOL developers. Mainframe ecosystem can be expensive. Limited abstraction mechanisms
How can I practice Cobol typing speed?
CodeSpeedTest offers 9+ real Cobol code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.