Interview Experience Analysis for NielsenIQ

Name: Nielseniq Interview Experience Data
Creator: CodingKaro
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Nielseniq interview, Nielseniq interview questions, tech interview, coding interview

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NielsenIQ Interview Experiences

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Data Engineer || NielsenIQ || 2 YOE

NielsenIQData Engineer💼 2 YOE

September 15, 2025

Summary

This post details an interview experience for a Data Engineer position at NielsenIQ, covering conceptual questions on data formats, Airflow, and Python, alongside specific SQL and PySpark coding chall...

Interview Experience

**Data Engineer** - Airflow, Python,Pyspark, Databricks position - Asked about different file formats (Delta file, ORC) - Difference between SCD2 and Delta files - Airflow functions, how to write sequential and parallel jobs - Advanced Python function (other than lambda like Decorators, Generator...

Interview Questions (10)

Data File Formats

Other

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SCD2 vs. Delta Files

Other

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Airflow Sequential and Parallel Jobs

Other

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Advanced Python Concepts

Other

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Longest Trip Per Vehicle (SQL)

Data Structures & Algorithms

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Compare Current Trip Distance with Previous (SQL)

Data Structures & Algorithms

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Optimize Duplicate Removal (SQL)

Data Structures & Algorithms

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Load CSV into Spark DataFrame with Schema Inference

Data Structures & Algorithms

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Convert Columns to Timestamp in PySpark

Data Structures & Algorithms

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PySpark UDF for Trip Classification

Data Structures & Algorithms

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