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Q: Explain START command
Answer:
START schedules transaction for later. EXEC CICS START TRANSID(trans) AFTER HOURS(1) FROM(data). INTERVAL or TIME for specific time. Data passed in channel/container or FROM/LENGTH. Background processing.
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Q: What is CICS asynchronous processing?
Answer:
RUN TRANSID for async execution. EXEC CICS RUN TRANSID(xx) CHILD. FETCH CHILD waits for completion. Modern async pattern. Alternative to START.
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Q: Explain CICS event processing
Answer:
CICS events for complex situations. WAIT EVENT for multiple conditions. Posted externally. WAIT EXTERNAL alternative. Modern: EVENT binding for async.