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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
90 interviews found
Vishal Kashyap
(2 Questions)
- Q1. String traversal
- Q2. Oops and interface coding
Anonymous
(2 Questions)
- Q1. What is spark-submit
- Ans.
spark-submit is a command-line tool used to submit Spark applications to a cluster
spark-submit is used to launch applications on a Spark cluster
It allows users to specify application parameters and dependencies
Example: spark-submit --class com.example.MyApp myApp.jar
- Q2. Optimizing techniques
- Ans.
Optimizing techniques are essential for improving data processing efficiency.
Utilize indexing to speed up data retrieval operations
Implement caching mechanisms to reduce redundant data processing
Use parallel processing to distribute workloads and improve performance
Optimize database queries by analyzing and restructuring them for efficiency
Skills evaluated in this interview
I applied via Naukri.com and was interviewed in Sep 2023. There was 1 interview round.
(4 Questions)
- Q1. What is Magic Table in SQL?
- Ans.
Magic Table in SQL is a temporary table that is automatically created and populated with data during triggers execution.
Magic Table is also known as 'Inserted' table in SQL Server.
It is used in triggers to access the data that was inserted, updated, or deleted in a table.
For example, in an 'AFTER INSERT' trigger, the Magic Table contains the rows that were just inserted.
- Q2. How can we Optimize SP?
- Ans.
Optimizing stored procedures involves improving performance by reducing execution time and resource usage.
Identify and eliminate unnecessary or redundant code
Use appropriate indexing to speed up data retrieval
Avoid using cursors and loops for better performance
Update statistics regularly to help the query optimizer make better decisions
Consider partitioning large tables to improve query performance
- Q3. How to avoid data skewness?
- Ans.
Avoid data skewness by partitioning data, using sampling techniques, and optimizing queries.
Partition data to distribute evenly across nodes
Use sampling techniques to analyze data distribution
Optimize queries to prevent skewed data distribution
- Q4. How can we join a table without any identity columns?
- Ans.
You can join tables without identity columns using other unique columns or composite keys.
Use other unique columns or composite keys to join the tables
Consider using a combination of columns to create a unique identifier for joining
If no unique columns are available, consider using a combination of non-unique columns with additional logic to ensure accurate joins
Interview Preparation Tips
Skills evaluated in this interview
Mayawati Waghmare
I was interviewed in Jun 2024.
(2 Questions)
- Q1. Spark architecture
- Q2. Python Coding, sql queries
TCS interview questions for designations
Selected
I applied via LinkedIn and was interviewed in Aug 2023. There was 1 interview round.
(5 Questions)
- Q1. Spark optimization
- Q2. Cloud - AWS/GCP/Azure as mentioned in resume
- Q3. Hadoop , MapReduce
- Q4. Projects mentioned in Resume
- Q5. SQL, python basic questions
Get interview-ready with Top TCS Interview Questions
Selected
(2 Questions)
- Q1. How migrate data from local server to AWS redshift
- Ans.
To migrate data from a local server to AWS Redshift, you can use various methods such as AWS Database Migration Service, AWS Glue, or manual ETL processes.
Use AWS Database Migration Service (DMS) to replicate data from the local server to Redshift
Create a DMS replication instance and endpoints for the source and target databases
Configure the replication task to specify the source and target endpoints, table mappings, a...
- Q2. Do you have experience in aws glue, how will you use glue for data migration?
- Ans.
Yes, I have experience in AWS Glue and can use it for data migration.
AWS Glue is a fully managed extract, transform, and load (ETL) service that makes it easy to prepare and load data for analytics.
To use Glue for data migration, I would start by creating a Glue job that defines the source and target data sources, as well as any transformations needed.
I would then configure the job to run on a schedule or trigger it ma...
Skills evaluated in this interview
Palindrome questions
(1 Question)
- Q1. About project, basic questions on c, java
SQL database question, python program, gcp services
(2 Questions)
- Q1. Salary discussion
- Q2. Date of joining
- Ans.
I joined the company on January 15, 2020.
Joined on January 15, 2020
Started working at the company on this date
Julee Kumari
Multiple choice questions
Gcp services and python,sql coding
(2 Questions)
- Q1. Whats ur cctc and expected ctc?
- Ans.
I am currently earning X amount and my expected salary is Y amount.
Current CTC is X amount
Expected CTC is Y amount
- Q2. Why are u looking for job change?
(1 Question)
- Q1. Questions on sql, spark, hadoop, mapreduce
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 Data Engineer Interview Process
based on 74 interviews in last 1 year
3 Interview rounds
- Technical Round 1
- Technical Round 2
- HR Round
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