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Which of the following descriptions best fits Delta Lake?
A Spark API for exporting data from a relational database into CSV files.
A relational storage layer for Spark that supports tables based on Parquet files.
A synchronization solution that replicates data between SQL Server and SPark.
You've loaded a Spark dataframe with data, that you now want to use in a delta table. What format should you use to write the dataframe to storage?
CSV
PARQUET
DELTA
You have a managed table based on a folder that contains data files in delta format. If you drop the table, what happens?
The table metadata and data files are deleted.
The table definition is removed from the metastore, but the data files remain intact.
The table definition remains in the metastore, but the data files are deleted.
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