Answer: Parquet

The question asks for a semi-structured file format that is compressed, efficient, and columnar. Parquet (D) is the correct answer because it is specifically designed as a columnar storage format that provides high compression and efficient query performance for analytical workloads. While Avro (A) is semi-structured and supports compression, it is row-based, not columnar. JSON (B) is semi-structured but not inherently compressed or columnar. TSV (C) is a row-based, uncompressed text format. The community discussion unanimously supports Parquet with 100% consensus and upvoted comments explaining its column-oriented design for efficient storage and retrieval.

Author: LeetQuiz Editorial Team