Spark Interview Question2: What is file format? AVRO vs Parquet vs ORC

Date: March 5th, 2024

Hi everyone! I started posting contents about Spark interview questions for SWE/Data Engineers, mainly for Spark Optimization related questions. I aim to continuously write about ten posts about Spark optimization. After the series of these posts, you will ace technical interviews related to Spark! Although this post aims for helping technical interview rounds, any Spark users will find this series insightful and help your learning!

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What are File formats?

Storage formats determine how data is stored and retrieved. The choice of storage format can impact the efficiency of read and write operations and the overall performance of Spark applications. Compressing data when reading from and writing to storage reduces I/O overhead and speeds up data transfer. In this section, we will introduce a variety of…