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Explain what is etl process? How many steps etl contains explain with example?
What are snapshots? What are materialized views & where do we use them? What is a materialized view log?
where is the cache (lookup, index) created and how can you see it.
How to recover a workflow? What are the different approaches?( In prod i.e no access to modify)
How many types of transformations supported by sorted input?
Explain the use lookup tables and Aggregate tables?
what are Lookup caches options? Including persistent caches.
What is tracing level? How many types of transformations supported by sorted input?
What are your responsibilities as an etl tester?
What is partitioning? Explain about round-robin, hash partitioning.
Explain different types of partitioning?
What is virtual Data Warehousing?
What are the three tiers in etl?
Difference between flat files and relational sources?
how would u estimate the size of Aggregator transform data and index cache?