DELTA Data Engineer Interview Questions, Process, and Tips

Q1. 1- Tell me about yourself 2- Spark questions (Architecture, Dag, Lineage,Broadcast, Accumulator, Repartition,coalesce,cache,persist,etc) 3- Basic Pyspark coding problem 4- Python coding problem(Array) 5- ...read more
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Q1. 1- Tell me about yourself 2- Spark architecture 3- Parquet vs avro 4- catalyst optimiser 5- external table vs managed table vs cluster table 6- GIL in python 7- Memory management in python 8- Data skewnes...read more
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Q1. Why do you want to work here,
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Q2. They want to know your passion and motivation for the opportunity
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Q3. Tell me about you
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Q4. What are your expectations
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Q5. When are you ready to start
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Q1. What information can you provide about the projects you worked on in your previous companies
Ans. 
I have worked on projects involving data pipeline development, ETL processes, and data warehousing.
• Developed and maintained data pipelines to ingest, process, and store large volumes of data

• Implemented ETL processes to transform raw data into usable formats for analysis

• Designed and optimized data warehouses for efficient storage and retrieval of data

• Worked on real-time data processing using technologies like Apache Kaf
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Q2. What are some SQL queries that utilize joins and window functions?
Ans. 
SQL queries using joins and window functions
• Use INNER JOIN to combine rows from two or more tables based on a related column

• Use WINDOW functions like ROW_NUMBER() to assign a unique sequential integer to each row within a partition

• Example: SELECT column1, column2, ROW_NUMBER() OVER(PARTITION BY column1 ORDER BY column2) AS row_num FROM table_name
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Q1. What are the reasons for your decision to leave your current organization?
Ans. 
Seeking new challenges and growth opportunities in a more innovative environment.
• Desire for career advancement

• Lack of growth opportunities in current organization

• Interest in working with new technologies or industries

• Seeking a more collaborative or dynamic work environment
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Q2. What are your reasons for wanting to join this company?
Ans. 
I am impressed by the company's innovative projects and collaborative work culture.
• Innovative projects in the data engineering field

• Collaborative work culture that fosters growth and learning

• Company's reputation for valuing employee input and ideas
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Q1. Most of questions from your project
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Q2. Oops concepts SQL joins
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Q3. Angular Data binding
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Q1. Angular project
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Q1. Telecome domain related questions along with Unix shell scripting and SQL database question .
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Common Aptitude along with HTML5, CSS

Q1. Mostly questions were on HTML5,CSS and web development related questions.
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Q1. What is MVP architecture?
Ans. 
MVP architecture stands for Model-View-Presenter architecture, a design pattern that separates the presentation layer from the business logic.
• MVP divides the application into three components: Model (data), View (UI), and Presenter (logic).

• Model represents the data and business logic, View represents the UI, and Presenter acts as an intermediary that communicates between Model and View.

• MVP helps in achieving separation...read more
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Q2. How to structure a database for a amazon like application
Ans. 
Use relational database with tables for users, products, orders, etc. Utilize indexes for fast querying.
• Create a table for users with columns like user_id, name, email, etc.

• Create a table for products with columns like product_id, name, price, etc.

• Create a table for orders with columns like order_id, user_id, product_id, quantity, etc.

• Utilize indexes on commonly queried columns like user_id, product_id for faster retri...read more
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Q1. What is your Name ?
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Q2. Meghana shivanand harikant
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Q3. What work do you want to do?
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Q4. Data entry operator work form home
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