Cognizant Data Engineer Interview Questions

The questions to prepare for a Cognizant Data Engineer interview. Questions from real interview reports rank first. Updated weekly.

Data Warehousing in Pipelines

Easy

Explain what a data warehouse is and why it matters in analytics pipelines.

InfrastructureETLData Modeling

Cognizant

Handling Missing Data in Pipelines

Medium

Approach for handling missing data in an ML data pipeline, including validation, imputation, and safe downstream consumption.

InfrastructureETLBatch Processing

Cognizant

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Basic C Programming Questions

Easy

Tests your fundamentals in C, including core syntax, data types, and basic algorithms.

ArraysStringsSorting

Cognizant

Merge Two Sorted Lists in Python

Easy

Tests basic algorithmic coding ability and correctness in Python.

ArraysSortingTwo Pointers

Cognizant

Python Fundamentals and Practice

Easy

Tests your Python fundamentals relevant to data engineering tasks.

Hash TablesArraysStrings

Cognizant

SQL Fundamentals and Queries

Easy

Tests your ability to write and reason about SQL for data retrieval and manipulation.

JoinsGroup ByAggregations

Cognizant

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