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Bain & Company Data Engineer Interview Questions and Answers
Bain & Company Data Engineer Interview Experiences
1 interview found
Anonymous
I applied via Company Website and was interviewed in Aug 2024. There were 2 interview rounds.
(2 Questions)
- Q1. Project related discussions
- Q2. Meduim level SQl and DSA
(2 Questions)
- Q1. This was data modelling round
- Q2. Design a uber data model
- Ans.
Uber data model design for efficient storage and retrieval of ride-related information.
Create tables for users, drivers, rides, payments, and ratings
Include attributes like user_id, driver_id, ride_id, payment_id, rating_id, timestamp, location, fare, etc.
Establish relationships between tables using foreign keys
Implement indexing for faster query performance
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I applied via Company Website and was interviewed in Nov 2024. There were 2 interview rounds.
(2 Questions)
- Q1. Sql constrainsts, star schema, dml dcl commands
- Q2. About cureent project and responsibilities
(2 Questions)
- Q1. Current projects and resposibilities
- Q2. Where vs having, reason for job change
Interview Preparation Tips
2. Technical with senior manager- about project ,where vs having , reason of job change
vinay kn
I was interviewed in Dec 2024.
(6 Questions)
- Q1. What is spark,explain its ecosystem
- Q2. What are transformations, and how many types of transformations exist?
- Q3. Explain about spark job process and its planning
- Q4. What are the concepts of coalesce and repartition in data processing?
- Q5. Explain about oom and driverhead memory
- Q6. What is data skewness
Selected
I applied via Recruitment Consulltant and was interviewed in Dec 2024. There was 1 interview round.
(2 Questions)
- Q1. Sql order of execution
- Ans.
SQL order of execution determines the sequence in which different clauses are processed in a query.
SQL query is parsed and validated first
Next, the query optimizer creates an execution plan
Execution plan includes steps like table scans, index scans, joins, etc.
Finally, the query is executed and results are returned
- Q2. Sql question on finding highest salary for each employee where employees and department table are given in each department.
Interview Preparation Tips
- SQL
- Python
- Pyspark
(2 Questions)
- Q1. Project explaining
- Q2. Write code to generate csv file with note pad data
- Ans.
Code to generate a CSV file with notepad data
Open a text file and read the data
Parse the data and write it to a CSV file
Use libraries like pandas in Python for easier CSV handling
I applied via Approached by Company and was interviewed in Aug 2024. There was 1 interview round.
Maxium sub string and reverse a string
(1 Question)
- Q1. Data warehouse concepts
The test was conducted on AMCAT by SHL. The questions were pretty moderate
(2 Questions)
- Q1. I was asked SQL and about my project on data science. The interview was not much difficult
- Q2. I was also asked a riddle. 9 coins with 1 coin having different weight - find odd one out
(1 Question)
- Q1. Was asked DBMS and about my project
Interview Preparation Tips
I applied via Naukri.com and was interviewed in Sep 2024. There were 2 interview rounds.
Round 1 was online Test where one basic coding question was there and few aptitiude , verbal ability and python based question.
(2 Questions)
- Q1. What is Data WareHouse..?
- Q2. Nested Queries in Bigquery..?
Interview Preparation Tips
- Python
- SQL
- Cloud
Selected
I applied via LinkedIn and was interviewed in Sep 2024. There were 2 interview rounds.
(5 Questions)
- Q1. Spark architecture
- Q2. Difference between coalesce and reparation
- Ans.
Coalesce is used to return the first non-null value among its arguments, while reparation is not a standard function in SQL.
Coalesce is a standard SQL function, while reparation is not.
Coalesce returns the first non-null value among its arguments.
Reparation is not a standard SQL function and may refer to a custom function or process specific to a certain system or application.
- Q3. SQL question using Lag window function
- Q4. Same question in Pyspark
- Q5. Project and day to day activities
(2 Questions)
- Q1. Scenario based questions
- Q2. Gave details about work
Interview Preparation Tips
- Spark
- SQL
- Pyspark
- Project
- Soft Skills
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Bain & Company Data Engineer Interview Process
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