Mainframe Software Developer Interview Questions

314 mainframe software developer interview questions shared by candidates

COBOL: Static vs. Dynamic Call, SEARCH vs. SEARCH ALL, COMP-3 usage, PERFORM types, debugging S0C7. JCL: JOBLIB vs. STEPLIB, GDG, COND vs. IF, restart steps. DB2: Deadlocks (-911), isolation levels, REORG vs. RUNSTATS, SQL performance tuning. IMS: GU vs. GN, PSB, Checkpoints.
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Mainframe Developer

Interviewed at Infosys

3.6
Feb 23, 2025

COBOL: Static vs. Dynamic Call, SEARCH vs. SEARCH ALL, COMP-3 usage, PERFORM types, debugging S0C7. JCL: JOBLIB vs. STEPLIB, GDG, COND vs. IF, restart steps. DB2: Deadlocks (-911), isolation levels, REORG vs. RUNSTATS, SQL performance tuning. IMS: GU vs. GN, PSB, Checkpoints.

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