20 Asked Mainframe Interview Questions and Answers (2024)

JCL is a scripting language used to define and execute job streams on mainframe systems.

Example:

JCL: //JOBNAME JOB ... //STEP1 EXEC PGM=PROGRAM1

COBOL (Common Business Oriented Language) is a high-level programming language designed for business applications on mainframes.

Example:

COBOL code: MOVE 10 TO AMOUNT.

VSAM is a file storage access method used in mainframes to organize and retrieve data efficiently.

Example:

VSAM definition: IDCAMS DEFINE CLUSTER ...

CICS is a transaction processing system that provides services for running applications concurrently on mainframes.

Example:

CICS command: EXEC CICS READ FILE(...)

DB2 is a relational database management system (RDBMS) used in mainframes for storing and retrieving data.

Example:

SQL query: SELECT * FROM TABLE_NAME WHERE COLUMN = 'VALUE';