CICS ⭐ Featured
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Q: How to use WAIT EVENT?

Answer:
WAIT suspends until event. EXEC CICS WAIT EVENT ECBLIST(ecb-list). Multiple ECBs. Returns when any posted. Used for synchronization. Timer events, external events.
wait event sync
VSAM
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Q: Explain UPGRADE attribute

Answer:
UPGRADE keeps AIX synchronized with base cluster. Changes to base automatically update upgraded AIX. Adds overhead to writes. Non-upgrade AIX needs manual BLDINDEX. Use UPGRADE for real-time currency.
upgrade aix synchronization