Câu 3: Databricks Certified Associate Developer for Apache Spark

Of the following situations, in which will it be most advantageous to store DataFrame df at the MEMORY_AND_DISK storage level rather than the MEMORY_ONLY storage level?

1. A. When all of the computed data in DataFrame df can fit into memory.
2. B. When the memory is full and it’s faster to recompute all the data in DataFrame df rather than read it from disk.
3. C. When it’s faster to recompute all the data in DataFrame df that cannot fit into memory based on its logical plan rather than read it from disk.
4. D. When it’s faster to read all the computed data in DataFrame df that cannot fit into memory from disk rather than recompute it based on its logical plan. — đáp án hiện tại
5. E. The storage level MENORY_ONLY will always be more advantageous because it’s faster to read data from memory than it is to read data from disk.