Câu 49: Databricks Certified Data Engineer Professional

Which of the following is true of Delta Lake and the Lakehouse?

1. A. Because Parquet compresses data row by row. strings will only be compressed when a character is repeated multiple times.
2. B. Delta Lake automatically collects statistics on the first 32 columns of each table which are leveraged in data skipping based on query filters. — đáp án hiện tại
3. C. Views in the Lakehouse maintain a valid cache of the most recent versions of source tables at all times.
4. D. Primary and foreign key constraints can be leveraged to ensure duplicate values are never entered into a dimension table.
5. E. Z-order can only be applied to numeric values stored in Delta Lake tables.