Spark Interview Question 3: What is Data Serialization? Java vs Kryo

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 is Data Serialization?

Data serialization is the process of converting data structures or object states into a format that can be stored (e.g., in a file or database) or transmitted (e.g., across a network) and then reconstructed later. In the context of Apache Spark, serialization is particularly important because it…