Interview questions
Write a Python function to check if a string is a palindrome.
What is the difference between a set and a list in Python?
How do you handle memory management in Python?
What is the difference between a generator and a list in Python?
Write a Python function to find the maximum value in a list without using the built-in max() function.
Tell me about your project: Explain your project, its goals, and the technologies you used.
Given the data with id, name, and department, how would you calculate how many employees are in each department?
How do you deploy from a development environment to QA and production?
Explain the architectural rationale for using LeftAntiJoin vs. NOT IN vs. NOT EXISTS in a distributed context. When does LeftAntiJoin become a performance or scalability bottleneck, and how do broadcast vs. shuffle joins affect cost?
How would you handle null values in a dataset, especially in a single column?
Can you explain the concept of incremental loading in Sqoop and how to use it for job processing?
Can you explain the concept of mappers in Spark, and how are they used in data transformations?
How would you move a file to another path in Databricks File System (DBFS)?
How would you read data from an RDBMS using Spark? Provide the syntax.
What Hadoop command would you use to merge multiple files into one?
What is YARN, and how does it manage resources in a Hadoop ecosystem?
What is the difference between managed and external tables in Hive or Spark SQL?
What performance tuning techniques do you apply in both Sqoop and Spark to optimize their execution?
Have you worked with Oozie? If yes, can you explain what it is and how it's used in data pipelines?
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