Which statement is true about the fastest section among Reading, Transforming, and Writing?

• A. The middle section is Writing.
• B. The fastest section is Transforming.
• C. The slowest section is Reading.
• D. The fastest section is Reading.

Answer: (B)

Think about a data workflow as three stages: reading data into memory, applying in-memory transformations, and writing the results out. The transforming stage is typically the fastest because it happens after the data is already loaded and relies on in-memory processing, which is generally quicker than performing disk or network I/O needed for reading or writing. So, declaring the fastest section as Transforming matches how these pipelines usually operate.

The middle stage is Writing would imply an order that isn’t standard, since the middle stage is where transformation occurs, not writing. Claiming the slowest section is Reading isn’t universally true; read times depend on storage speed and data size and can vary, whereas the transformation phase is usually designed for speed. Saying the fastest section is Reading contradicts the common pattern of faster in-memory processing during transformation.