JavaScript is required to use this application. Please enable JavaScript in your browser settings or disable any extensions that may be blocking scripts.
Interview questions · hard
What is the difference between SparkSession and SparkContext in Spark?
Explain the concept of checkpointing in Spark and why it is important.
Given 1TB of a file, how to check word count?
Explain the concept of RDD, DataFrame, and Dataset in PySpark.
Explain the concept of consumer groups in Kafka. How do they affect message processing?
Explain the difference between TriggerDagRunOperator and ExternalTaskSensor in Airflow.
How do you ensure data quality and consistency across different stages of a data pipeline?
How do you optimize a join operation in Spark for large datasets?
Get the complete 1,800+ question library with detailed, expert-level answers covering SQL, Spark, System Design, Python, Cloud, and Behavioral topics.