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TCS Data Engineer Interview Questions, Process, and Tips
Top TCS Data Engineer Interview Questions and Answers
- Q1. what is an internal and external table in Hive
- Q2. what is view in SQL and dense and dense rank
- Q3. How to deal with data quality issues
TCS Data Engineer Interview Experiences
89 interviews found
Saikat Pal
(1 Question)
- Q1. What is Spark is RDD
- Ans.
Spark RDD stands for Resilient Distributed Dataset, which is a fundamental data structure in Apache Spark.
RDD is an immutable distributed collection of objects that can be operated on in parallel.
It allows for fault-tolerant distributed data processing in Spark.
RDDs can be created from Hadoop InputFormats, local collections, or by transforming other RDDs.
Operations on RDDs are lazily evaluated, allowing for efficient d...
Skills evaluated in this interview
Selected
I applied via Company Website and was interviewed in Jan 2024. There were 3 interview rounds.
Quant, Reasoning is required here
Basic coding question needed
(2 Questions)
- Q1. Tell me about yourself
- Q2. Where do you find yourself in next 5 years
I applied via Naukri.com and was interviewed in Jan 2024. There was 1 interview round.
(1 Question)
- Q1. How to improve performance
- Ans.
Improving performance in data engineering involves optimizing code, utilizing efficient algorithms, and scaling infrastructure.
Optimize code by reducing unnecessary computations and improving data processing efficiency.
Utilize efficient algorithms and data structures to minimize time and space complexity.
Scale infrastructure by leveraging cloud services, parallel processing, and distributed computing.
Monitor performanc...
Interview Preparation Tips
What people are saying about TCS
(2 Questions)
- Q1. What is a CTE in SQL?
- Ans.
CTE stands for Common Table Expression in SQL, used to create temporary result sets that can be referenced within a query.
CTEs improve readability and maintainability of complex queries
They can be recursive, allowing for hierarchical data querying
CTEs are defined using the WITH keyword followed by the CTE name and query
- Q2. What is MERGE Statement used for?
- Ans.
MERGE statement is used to perform insert, update, or delete operations in a single statement based on a condition.
Combines INSERT, UPDATE, and DELETE operations into a single statement
Helps to avoid multiple separate statements for different operations
Useful for synchronizing data between two tables based on a condition
Skills evaluated in this interview
TCS interview questions for designations
(1 Question)
- Q1. How to call an notebook from another notebook using databricks
- Ans.
To call a notebook from another notebook in Databricks, use the %run command followed by the path of the notebook.
Use the %run command followed by the path of the notebook to call it from another notebook.
Make sure the notebook you want to call is in the same workspace or accessible to the notebook you are calling it from.
You can also pass parameters to the notebook being called using the %run command.
Interview Preparation Tips
Skills evaluated in this interview
Get interview-ready with Top TCS Interview Questions
I applied via Walk-in
(1 Question)
- Q1. Azure questions
Vinomathi Kannan
(1 Question)
- Q1. Sql, pyspark related
JASWINDER SINGH
Selected
I applied via LinkedIn and was interviewed in Oct 2023. There was 1 interview round.
(2 Questions)
- Q1. Difference between datastage and informatica
- Ans.
Datastage and Informatica are both ETL tools used for data integration, but they have differences in terms of features and capabilities.
Datastage is developed by IBM and is known for its parallel processing capabilities, while Informatica is developed by Informatica Corporation and is known for its strong data quality features.
Datastage has a more user-friendly interface compared to Informatica, making it easier for be...
- Q2. Types of hashing
- Ans.
Hashing is a technique used to convert data into a fixed-size string of bytes.
Hash functions are used to map data of arbitrary size to fixed-size values.
Common hashing algorithms include MD5, SHA-1, and SHA-256.
Hashing is commonly used in data security, password storage, and data retrieval.
Skills evaluated in this interview
vikas vk
(1 Question)
- Q1. 1.What is partition and bucketing. 2.diffrenece between union and union all. 3.spark architecture. 4.manage and external table in hive and diffirence. 5.sql and pyhton problem basic
- Ans.
Answers to interview questions for Data Engineer position.
1. Partitioning is a way to divide a large dataset into smaller, more manageable parts based on a specific column or expression. Bucketing is a technique to further organize the data within each partition into smaller, equally-sized files based on a hash function.
2. UNION combines the result sets of two or more SELECT statements, removing duplicate rows. UNION A...
Skills evaluated in this interview
I applied via Referral and was interviewed before Oct 2023. There were 2 interview rounds.
Basics on sql, python
Business case study and system design
TCS Interview FAQs
The duration of TCS Data Engineer interview process can vary, but typically it takes about less than 2 weeks to complete.
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TCS Interviews By Designations
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TCS Data Engineer Interview Process
based on 93 interviews
4 Interview rounds
- Technical Round - 1
- Technical Round - 2
- HR Round - 1
- HR Round - 2
Data Engineer Interview Questions from Similar Companies
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TCS Data Engineer Reviews and Ratings
based on 416 reviews
Rating in categories
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System Engineer
1.1L
salaries
|  ₹0 L/yr - ₹0 L/yr |
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IT Analyst
66.6k
salaries
| ₹0 L/yr - ₹0 L/yr |
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AST Consultant
51.5k
salaries
| ₹0 L/yr - ₹0 L/yr |
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Assistant System Engineer
29.8k
salaries
| ₹0 L/yr - ₹0 L/yr |
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Associate Consultant
29.5k
salaries
| ₹0 L/yr - ₹0 L/yr |
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