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Walmart Data Engineer Interview Questions and Answers
Walmart Data Engineer Interview Experiences
11 interviews found
Anonymous
I applied via Approached by Company and was interviewed in Jun 2022. There were 2 interview rounds.
(2 Questions)
- Q1. Round 1 was with manager, he asked questions about current project and some questions based on spark.
- Q2. Lazy Evaluation, configuration for running a spark jobs
(2 Questions)
- Q1. This is where the nightmare started, 1 scenario based coding questions and 3 sql questions were asked. The questions were of hacker rank level, its not that I couldn't solve those but for a guy who have wo...
- Q2. 1. Design and code a scheduler for allocating meeting rooms for the given input of room counts and timestamps: Input : No of rooms : 2 Time and dutation: 12pm 30 min Output: yes. Everytime th...
- Ans.
Design and code a scheduler for allocating meeting rooms based on input of room counts and timestamps.
Create a table with columns for room number, start time, and end time
Use SQL queries to check for available slots and allocate rooms
Consider edge cases such as overlapping meetings and room availability
Use a loop to continuously check for available slots and allocate rooms
Implement error handling for invalid input
Interview Preparation Tips
Selected
I applied via LinkedIn and was interviewed in Sep 2024. There were 2 interview rounds.
(2 Questions)
- Q1. Data Structures
- Q2. Algorithms concepts
(2 Questions)
- Q1. Data Engineering Concepts
- Q2. Spark and pyspark
Selected
- Q1. 2 pointer approach
- Q2. Dynamic prograaming
Ankita Gulati
Based on python and sql
(2 Questions)
- Q1. Related to spark
- Q2. Dimensional Modelling
What people are saying about Walmart
- Q1. 2 pointer approach
- Q2. Dynamic prograaming
What are the roles & responsibilities of a Data Engineer at Walmart?
Read full roles & responsibilities 
I applied via Approached by Company and was interviewed in Jun 2024. There was 1 interview round.
(1 Question)
- Q1. Static allocation in spark. 10TB of file needs to be processed in spark, what configuration (executors and cores) would you choose and why?
- Ans.
For processing 10TB of file in Spark, consider allocating multiple executors with sufficient cores to maximize parallel processing.
Allocate multiple executors to handle the large file size efficiently
Determine the optimal number of cores per executor based on the available resources and workload
Consider the memory requirements for each executor to avoid out-of-memory errors
Adjust the configuration based on the specific...
Skills evaluated in this interview
Walmart HR Interview Questions
I appeared for an interview before May 2024, where I was asked the following questions.
- Q1. Data pipeline failures and performance
- Ans.
Data pipeline failures can disrupt data flow; understanding causes and solutions is crucial for performance and reliability.
Monitoring and Alerts: Implement monitoring tools like Apache Airflow or AWS CloudWatch to detect failures in real-time.
Data Validation: Use schema validation (e.g., Apache Avro) to ensure data integrity before processing, preventing downstream errors.
Retry Mechanisms: Implement retry logic for tr...
- Q2. Spark question for clickstream
(2 Questions)
- Q1. Spark architecture
- Q2. Sql code medium level
Selected
I applied via Approached by Company and was interviewed before Jan 2022. There were 4 interview rounds.
(2 Questions)
- Q1. Mostly SQL advanced questions
- Q2. Few Programming questions on Python
(1 Question)
- Q1. SQL, Python and Azure Questions
(1 Question)
- Q1. Compensation and benefits
Interview Preparation Tips
Selected
I applied via Recruitment Consulltant and was interviewed before Feb 2023. There was 1 interview round.
SQL, Spark, Hive, Python
Interview Preparation Tips
Interview Questionnaire
2 Questions
- Q1. Enhance your theoritical knowledge.
- Q2. Coding skills using collections
- Ans.
Collections are essential for efficient data manipulation in Python. A strong grasp of collections is crucial for a data engineer.
Familiarity with lists, tuples, sets, and dictionaries
Understanding of when to use each collection type
Ability to manipulate and iterate through collections
Knowledge of built-in collection methods and functions
Experience with third-party collection libraries like NumPy and Pandas
Skills evaluated in this interview
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Overall Interview Experience Rating
based on 9 interview experiences
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Walmart Data Engineer Reviews and Ratings
based on 28 reviews
Rating in categories
|
Software Engineer III
2.1k
salaries
|  ₹23 L/yr - ₹40.6 L/yr |
|
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salaries
| ₹34.1 L/yr - ₹60 L/yr |
|
Software Engineer
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salaries
| ₹20.4 L/yr - ₹36 L/yr |
|
Software Developer
495
salaries
| ₹18.5 L/yr - ₹37.6 L/yr |
|
Software Development Engineer 3
409
salaries
| ₹25 L/yr - ₹40 L/yr |
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