hard20 pts · first answer countsdata-lakelakehouse

Why table formats exist

What key problem do open table formats like Apache Iceberg and Delta Lake solve compared with plain Parquet files in object storage?

A.They make Parquet files smaller by using a new compression algorithmB.They replace SQL with a new query languageC.They add a transaction log and metadata layer for ACID commits, schema evolution, time travel and safe concurrent writesD.They only work on local disks, which is faster

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Why table formats exist

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