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COBOL Interview Questions and Answers

This page provides a comprehensive collection of COBOL Interview Questions and Answers for freshers, experienced programmers, and mainframe professionals preparing for technical interviews. The questions range from beginner to advanced topics and include practical explanations to help you understand real-world COBOL programming concepts.

COBOL (Common Business-Oriented Language) remains one of the most widely used programming languages in banking, insurance, government, healthcare, and enterprise business applications. Thousands of mission-critical systems continue to run on COBOL, making experienced COBOL developers highly valuable in today's job market.

This interview guide covers frequently asked COBOL interview questions including Data Division, Procedure Division, Working Storage, Variables, File Handling, Sequential Files, VSAM, JCL integration, DB2 connectivity, CICS programming, debugging techniques, and performance optimization concepts commonly discussed during mainframe interviews.

Difficulty
Beginner to Advanced
Topics Covered
COBOL, JCL, VSAM, DB2 & CICS
Examples
Real Mainframe Programs
Updated
July 2026

Why Learn COBOL?

Despite being one of the oldest programming languages, COBOL continues to power mission-critical systems used by financial institutions, government organizations, insurance companies, and large enterprises worldwide. Many organizations actively hire COBOL developers to maintain and modernize legacy systems that process millions of transactions every day.

Interviewers generally evaluate a candidate's knowledge of COBOL syntax, divisions, file processing, VSAM files, DB2 integration, JCL, CICS, debugging techniques, and performance optimization. Practicing these interview questions helps strengthen your understanding of enterprise mainframe development.

Topics Covered

  • COBOL Fundamentals
  • Identification Division
  • Environment Division
  • Data Division
  • Procedure Division
  • Working Storage Section
  • Sequential & VSAM Files
  • JCL Basics
  • DB2 Integration
  • CICS Programming
  • Error Handling
  • Performance Optimization
Beginner
1. What is COBOL?
COBOL (Common Business-Oriented Language) is a high-level programming language mainly used for business, finance, and administrative systems.
Beginner
2. What are the divisions in a COBOL program?
Identification Division, Environment Division, Data Division, and Procedure Division.
Beginner
3. What is Identification Division?
It contains program information like PROGRAM-ID and author details.
Beginner
4. What is Data Division?
It defines variables, file structures, and data descriptions used in the program.
Beginner
5. What is Procedure Division?
It contains executable statements and business logic.
Beginner
6. What is PIC clause?
PIC (Picture) clause defines the data type and size of a variable.
Beginner
7. What does PIC 9 mean?
PIC 9 defines a numeric data item.
Beginner
8. What does PIC X mean?
PIC X defines an alphanumeric data item.
Beginner
9. What is WORKING-STORAGE SECTION?
It stores variables used throughout the program.
Beginner
10. What is LINKAGE SECTION?
It defines variables received from another program.
Beginner
11. What is PERFORM statement?
PERFORM executes a paragraph or section.
Beginner
12. What is MOVE statement?
MOVE copies data from one variable to another.
Beginner
13. What is DISPLAY statement?
DISPLAY prints output to the screen.
Beginner
14. What is STOP RUN?
STOP RUN terminates the program execution.
Beginner
15. What is ACCEPT statement?
ACCEPT reads input from the user.
Intermediate
16. What is OCCURS clause?
OCCURS defines an array in COBOL.
Intermediate
17. What is REDEFINES?
REDEFINES allows different data descriptions for the same memory location.
Intermediate
18. What is INDEXED file?
A file accessed using a key value.
Intermediate
19. What is SEQUENTIAL file?
A file accessed sequentially from beginning to end.
Intermediate
20. What is COMP?
COMP stores numeric data in binary format.
Intermediate
21. What is COMP-3?
COMP-3 stores numbers in packed decimal format.
Intermediate
22. What is EVALUATE statement?
EVALUATE works like switch-case in other languages.
Intermediate
23. What is STRING statement?
STRING combines multiple fields into one.
Intermediate
24. What is UNSTRING?
UNSTRING splits a string into multiple fields.
Intermediate
25. What is INSPECT?
INSPECT examines and modifies strings.
Intermediate
26. What is INITIALIZE?
INITIALIZE sets variables to default values.
Intermediate
27. What is CALL statement?
CALL invokes another program.
Intermediate
28. What is CANCEL statement?
CANCEL removes a called program from memory.
Intermediate
29. What is SORT verb?
SORT arranges records in ascending or descending order.
Intermediate
30. What is SEARCH?
SEARCH finds an element in an array.
Advanced
36. What is CICS?
Customer Information Control System used for online transaction processing.
Advanced
37. What is JCL?
Job Control Language used to run COBOL programs on mainframes.
Advanced
38. What is DB2?
IBM relational database often used with COBOL.
Advanced
39. What is SQLCODE?
SQLCODE returns status of SQL execution in DB2.
Advanced
40. What is VSAM?
Virtual Storage Access Method used for indexed file storage.
Coding Round
46. Display Hello World
DISPLAY "HELLO WORLD".
Coding Round
47. Add two numbers
ADD A TO B GIVING TOTAL.
Coding Round
48. If condition
IF A greater then B DISPLAY 'GREATER' END-IF.
Coding Round
49. Perform loop
PERFORM VARYING I FROM 1 BY 1 UNTIL I greater then 10 DISPLAY I END-PERFORM.
Coding Round
50. String concatenate
STRING 'HELLO' ' ' 'WORLD' INTO WS-MSG.

Continue Your Interview Preparation

Mainframe interviews often cover more than just COBOL programming. Recruiters also evaluate your knowledge of JCL, DB2, CICS, SQL, file processing, batch processing, operating systems, and database concepts. Building a strong understanding of these technologies will significantly improve your chances of succeeding in enterprise and banking interviews.

SQL Interview Questions
DB2 Interview Questions
Java Interview Questions
Operating System Questions

Tips to Crack a COBOL Interview

Employers hiring COBOL developers expect candidates to understand enterprise application development, batch processing, file handling, database connectivity, and debugging techniques. Besides learning COBOL syntax, you should also practice writing programs that perform file operations, process records, validate input, and generate reports.

You should also revise JCL execution flow, VSAM concepts, DB2 integration, CICS transactions, indexed files, sort and merge operations, and common interview scenarios related to banking and insurance applications where COBOL is still widely used.

Recommended COBOL Learning Path

  • COBOL Language Fundamentals
  • Data Division
  • Working Storage
  • Procedure Division
  • Sequential Files
  • Indexed & VSAM Files
  • JCL Programming
  • DB2 Programming
  • CICS Concepts
  • Error Handling
  • Performance Tuning
  • Mainframe Best Practices

About This COBOL Interview Guide

This COBOL Interview Questions and Answers guide has been created for students, fresh graduates, software developers, and experienced mainframe professionals preparing for technical interviews. The questions are based on topics that are frequently asked by companies working in banking, finance, insurance, healthcare, and government sectors.

Our goal is to provide an easy-to-understand learning resource that helps candidates strengthen their programming knowledge and improve interview performance. Continue practicing real-world coding exercises, debugging techniques, and enterprise application development to become confident in COBOL interviews.