Real questions from top companies in Spark/Big Data
Sqoop Incremental Import?
Sqoop command for importing multiple tables
Steps to link a Databricks notebook to an ADF pipeline
Steps to mount storage in Databricks.
Suppose you have a DAG that ingests data from multiple databases. How would you increase task parallelism in Airflow to improve performance without overloading the system?
Suppose you need to import 5 tables from an external RDBMS (like MySQL) into Hadoop HDFS. Write the Sqoop command
Task Dependencies in DAG
Trade-offs between batch processing (Spark) vs. real-time streams (Kafka)
Transformation vs. Action in PySpark?
Usage of UDFs?
Walk through how you would debug the data ingestion process to identify slow stages.
Walkthrough Spark's architecture, focusing on driver, executors, and DAGs
What Hadoop command would you use to merge multiple files into one?
What are Hadoop commands for Get and Merge?
What are Spark Submit properties?
What are Spark optimizations, and can you explain them?
What are the advantages of using Dataproc over a traditional Hadoop setup?
What are the advantages of using Delta Lake over Parquet?
What are the challenges of implementing real-time analytics using Spark Streaming?
What are the differences between %pip and %conda commands in Databricks?
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