Real questions from top companies in Spark/Big Data · easy
What are the trade-offs between using Glue Catalog vs. Hive Metastore for metadata management?
What are transient clusters in EMR, and when would you use them?
What configurations are needed to pass parameters to a Databricks notebook?
What file format does Delta Lake use, and why is it beneficial?
What happens if the vacuum command is not run periodically?
What happens when an executor fails during a task execution?
What is Avro file format & what is its significance in delta tables?
What is Databricks Auto Loader, and how does it handle new files?
What is YARN, and how does it manage resources in a Hadoop ecosystem?
What is YARN?
What is a DAG in Apache Airflow, and how is it used for scheduling workflows?
What is one disadvantage of using Scala for data engineering tasks?
What is the difference between external and internal tables in Hive?
What is the difference between head() and take() in PySpark?
What is the difference between managed and external tables in Hive or Spark SQL?
What is the difference between map and flatMap in Spark transformations?
What is the purpose of the VACUUM command in Delta Lake?
What limitations do you face when using Delta Tables in a multi-cloud environment?
What metrics do you use to determine whether a Spark job is going well or not?
Which Spark version are you using in your project, and why did you choose it?
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