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Q: What is NOHANDLE option?
Answer:
NOHANDLE suppresses condition handling. EXEC CICS command NOHANDLE RESP(ws-resp). Program handles all conditions. No HANDLE CONDITION invoked. Cleaner error handling. Recommended approach.
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Q: What is INVOKE SERVICE?
Answer:
INVOKE SERVICE calls web service. EXEC CICS INVOKE SERVICE. PIPELINE processing. SOAP/REST support. Modern integration. Requires CICS TS 3.1+.
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Q: Explain CALL statement and parameters
Answer:
CALL invokes subprogram: CALL 'SUBPROG' USING param-1 param-2. BY REFERENCE (default) passes address. BY CONTENT passes copy. BY VALUE passes value (for C). ON EXCEPTION handles load failures. CANCEL releases memory.
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Q: What is EXEC PGM vs PROC?
Answer:
EXEC PGM=name executes program directly. EXEC procname or EXEC PROC=procname invokes cataloged procedure. EXEC name where 'name' exists as PROC takes precedence. Procedures can be overridden with PROC.STEP.DD syntax.