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Principal Global Services Senior Data Engineer Interview Questions and Answers
6 Interview questions
Reverse a list without using inbuilt functions
Create two pointers, one at the start and one at the end of the array
Swap the elements at the two pointers and move them towards the center until they meet
Repeat the process until the entire list is reversed
Using Common Table Expressions (CTEs) to delete duplicates in SQL query
Use a CTE to identify duplicates by ranking rows based on a unique identifier
Delete rows with duplicate ranks in the main query
Implemented query optimization techniques to improve performance in data processing.
Utilized indexing to speed up data retrieval
Optimized SQL queries by rewriting them for better performance
Implemented caching mechanisms to reduce redundant data processing
SQL joins combine data from two or more tables based on a related column between them.
Different types of SQL joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.
The number of records in the result of a join depends on the type of join and the data in the tables.
For example, an INNER JOIN will only return records that have matching values in both tables, while a LEFT JOIN will return all records from the...
End to end project implementation involves taking a project from conception to completion, including planning, development, testing, and deployment.
Define project goals and requirements
Design data pipelines and architecture
Develop and implement data processing algorithms
Test and validate data quality and accuracy
Deploy and monitor the project in production
Iterate and improve based on feedback
End to end project architecture involves designing and implementing a data pipeline to process and analyze data from various sources.
Define project requirements and goals
Design data architecture including data sources, storage, processing, and analytics tools
Implement data pipeline to extract, transform, and load data
Ensure data quality and consistency throughout the pipeline
Monitor and optimize performance of the...
Principal Global Services Senior Data Engineer Interview Experiences
1 interview found
ABHISHEK JHA
I applied via Approached by Company and was interviewed in May 2024. There were 2 interview rounds.
(5 Questions)
- Q1. End to End project Architecture and data pipeline working
- Ans.
End to end project architecture involves designing and implementing a data pipeline to process and analyze data from various sources.
Define project requirements and goals
Design data architecture including data sources, storage, processing, and analytics tools
Implement data pipeline to extract, transform, and load data
Ensure data quality and consistency throughout the pipeline
Monitor and optimize performance of the data...
- Q2. Optimization performed in current project
- Ans.
Implemented query optimization techniques to improve performance in data processing.
Utilized indexing to speed up data retrieval
Optimized SQL queries by rewriting them for better performance
Implemented caching mechanisms to reduce redundant data processing
- Q3. SQL query to delete Duplicates using CTEs
- Ans.
Using Common Table Expressions (CTEs) to delete duplicates in SQL query
Use a CTE to identify duplicates by ranking rows based on a unique identifier
Delete rows with duplicate ranks in the main query
- Q4. Basic Python theory questions on lists and tuples and dictionaries
- Q5. Reverse a list without inbuilt functions
- Ans.
Reverse a list without using inbuilt functions
Create two pointers, one at the start and one at the end of the array
Swap the elements at the two pointers and move them towards the center until they meet
Repeat the process until the entire list is reversed
(4 Questions)
- Q1. End to End Project implementation
- Ans.
End to end project implementation involves taking a project from conception to completion, including planning, development, testing, and deployment.
Define project goals and requirements
Design data pipelines and architecture
Develop and implement data processing algorithms
Test and validate data quality and accuracy
Deploy and monitor the project in production
Iterate and improve based on feedback
- Q2. ETL Data warehousing concepts like CDC,SCD & Schema Design
- Q3. Question on Data Mesh & Architecture Design for ETL
- Q4. SQL joins, number of records for each join
- Ans.
SQL joins combine data from two or more tables based on a related column between them.
Different types of SQL joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.
The number of records in the result of a join depends on the type of join and the data in the tables.
For example, an INNER JOIN will only return records that have matching values in both tables, while a LEFT JOIN will return all records from the left...
Interview Preparation Tips
- Project Implementation
- Data Warehousing
- SQL
Skills evaluated in this interview
What people are saying about Principal Global Services
Interview questions from similar companies
Anonymous
I applied via Naukri.com and was interviewed in Jul 2024. There were 2 interview rounds.
(1 Question)
- Q1. Explain dependency injection in .NET and how to resolve dependency?
- Ans.
Dependency injection in .NET is a design pattern where dependencies are injected into a class rather than the class creating them itself.
Dependency injection helps in achieving loose coupling between classes.
In .NET, dependency injection can be implemented using frameworks like Unity, Ninject, or built-in .NET Core DI container.
Dependencies can be resolved through constructor injection, property injection, or method in...
(1 Question)
- Q1. Discussion on work experience and what are the projects that you have worked on?
Skills evaluated in this interview
(2 Questions)
- Q1. CORS errors and API calls
- Q2. JSON serialisation desirialization
Interview Preparation Tips
Selected
I applied via Referral and was interviewed in Dec 2023. There were 4 interview rounds.
(2 Questions)
- Q1. String based question, was of medium difficulty.
- Q2. Linked List based question, was of easy-medium difficulty.
(2 Questions)
- Q1. Java 8 and Core Java Fundamentals
- Q2. Explain one sorting algorithm.
Multiple medium level MCQs on Java. 3 Coding Questions, 2 easy-medium and one Java 8 Coding question of medium-hard difficulty
(2 Questions)
- Q1. Tell me about yourself/previous work ex/projects.
- Q2. Salary negotiation
Interview Preparation Tips
- DSA
- Java
Skills evaluated in this interview
I applied via Recruitment Consulltant and was interviewed before Dec 2023. There was 1 interview round.
(1 Question)
- Q1. What challenges did you encounter during the implementation of DevOps?
I applied via Company Website and was interviewed in Sep 2024. There were 2 interview rounds.
Aptitude questions . Medium level questions. Can be prepare in 1 month
Questions on Graph and DP. Hard level questions
Interview Preparation Tips
Selected
I applied via Campus Placement and was interviewed before Apr 2023. There were 3 interview rounds.
First round online. oding test
(1 Question)
- Q1. Questions on resume
(1 Question)
- Q1. Where do you see yourself in 5 years
Selected
I appeared for an interview in Jan 2025.
(1 Question)
- Q1. Questions based on your technology
Scenario based questions
Interview Preparation Tips
Selected
I appeared for an interview in Sep 2024, where I was asked the following questions.
- Q1. Design a system for booking a meeting room.
- Ans.
A system to efficiently book, manage, and track meeting room availability and reservations.
User authentication: Ensure only authorized users can book rooms.
Room availability: Display real-time availability of meeting rooms.
Booking interface: Provide a user-friendly interface for selecting dates, times, and rooms.
Notifications: Send email or app notifications for booking confirmations and reminders.
Cancellation policy: ...
- Q2. Angular questions were not asked
- Q3. Question related to Cosmos DB , Azure Services and .net core
Interview Preparation Tips
Selected
I applied via Naukri.com and was interviewed in Aug 2022. There were 3 interview rounds.
(1 Question)
- Q1. Asked mostly on pure technical questions. Asked on PowerBI, SQL , scenario based questions.
(1 Question)
- Q1. Business related questions
Interview Preparation Tips
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