How would you find the latest record based on the latest timestamp in a table for a particular customer, given that the table contains historical data and self-joins and nested queries are expensive? What optimized query would you use?
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LTIMindtree Data Engineer interview questions & answers
A Data Engineer was asked 2mo agoQ. Explain how to perform joins in Python, PySpark, and SQL, including the use of a...read more
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A Data Engineer was asked 5mo agoQ. Can you describe your experience?
Popular interview questions of Data Engineer
A Data Engineer was asked 3mo agoQ1. Why do you want to join LTIMindtree?
A Data Engineer was asked 6mo agoQ2. Can you describe your experience?
A Data Engineer was asked 6mo agoQ3. What are the differences between a list and a tuple?
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