Infosys Data Engineer interview questions & guide 2026

Your interviewers at Infosys will evaluate both your theoretical knowledge and your practical coding skills. The questions are structured to assess your logical thinking, coding efficiency, and architectural awareness. While questions may vary depending on the specific client team and technology stack you are matching with, they consistently follow clear patterns focused on core data engineering domains.

SQL & Database Design

This category tests your ability to write efficient queries, optimize database performance, and manipulate relational data under realistic business constraints.

• How do you write a query to identify and eliminate duplicate records from a table without a primary key?
• Can you explain the difference between OLTP and OLAP database designs, and when you would use each?

To succeed in the Infosys hiring process, you must prepare systematically across several core evaluation dimensions. The interviewers look for a balanced mix of technical mastery, architectural vision, and behavioral alignment.

Role-Related Knowledge – You must demonstrate a deep understanding of your primary programming languages (Python or Java) and your core data engineering tools (SQL, PySpark, Databricks). Be prepared to explain the internal mechanics of these technologies, rather than just how to use them.

Problem-Solving & System Design – You will be evaluated on your ability to break down complex, ambiguous data challenges into logical, structured solutions. Interviewers want to see how you approach data modeling, pipeline architecture, and system scalability constraints.

Collaboration & Communication – As a consultant and engineer at Infosys, you must be able to explain complex technical concepts clearly to both technical and non-technical stakeholders. Your ability to articulate design choices, trade-offs, and project architectures is highly valued.

Culture & Behavioral Fit – Infosys values continuous learning, client-centricity, and collaborative teamwork. You should be ready to discuss how you navigate project challenges, manage tight deadlines, and work effectively within diverse global teams.

The interview process for a Data Engineer at Infosys is designed to evaluate your technical competency and architectural depth efficiently. While the process is rigorous, candidates frequently describe it as structured, fast-moving, and professional. The entire cycle, from the initial application to the final decision, is typically completed within two to three weeks.

The journey begins with an initial HR screening to verify your background, experience level, and alignment with the role's requirements. Following a successful screen, you will typically undergo two to three intensive technical rounds, followed by a final behavioral and HR discussion. Depending on your location and the specific seniority of the role, some regions utilize a streamlined "one and done" virtual panel interview format that compresses the technical evaluation into a single, high-intensity session.

The visual timeline above outlines the standard progression of the Infosys data engineering recruitment cycle. Candidates should use this timeline to pace their preparation, ensuring they are fully ready for hands-on coding and system architecture discussions by the time they reach the technical rounds. While the technical stages are highly structured, the exact sequencing and number of rounds may vary slightly based on the specific client-facing team or geographic location.

To stand out during the technical rounds, you need to demonstrate deep, practical expertise in several key focus areas. Infosys interviewers will push past surface-level definitions to test your real-world implementation experience.

SQL & Relational Database Engineering

SQL is a foundational pillar of the Data Engineer role at Infosys. You will face scenario-based questions that require you to write clean, optimized SQL queries live.

Be ready to go over:

• Query Optimization – Indexing strategies, analyzing execution plans, and avoiding costly operations like full table scans.
• Analytical Window Functions – Utilizing functions like ROW_NUMBER(), RANK(), DENSE_RANK(), and LEAD/LAG to solve complex data partitioning problems.
• Incremental Loading – Designing CDC (Change Data Capture) mechanisms, upsert logic, and tracking active records using slowly changing dimensions (SCD Type 1 and Type 2).
• Advanced concepts (less common) – Recursive Common Table Expressions (CTEs), database partitioning, and query tuning for distributed SQL engines like Presto or Athena.

Example questions or scenarios:

• "Given a table of customer transactions, write a query to find the running total of spending for each customer over time."
• "How would you design a SQL-based process to detect and merge duplicate customer profiles based on partial matches?"
• "Explain how you would write a query to identify gaps in a sequential transaction ID sequence."

Big Data & Cloud Ecosystems

As enterprises migrate to the cloud, Infosys expects its data engineers to be highly proficient in modern cloud data platforms and distributed computing frameworks.

Be ready to go over:

• Apache Spark & PySpark – Partitioning and bucketing strategies, broadcast joins, wide vs. narrow transformations, and caching/persisting data.
• Databricks & Delta Lake – Configuring auto-scaling clusters, optimizing storage with Z-Ordering and liquid clustering, and managing the Delta transaction log.
• Cloud Data Warehousing – Architecting scalable storage and compute layers in platforms like Snowflake, GCP BigQuery, or Azure Synapse.
• Advanced concepts (less common) – Spark UI debugging, skew join mitigation, and configuring custom cluster policies in cloud environments.

Example questions or scenarios:

• "How would you diagnose and resolve a data skew issue that is causing a specific partition in your Spark job to run extremely slowly?"
• "Describe how you would design a streaming pipeline to ingest real-time IoT data into a Delta Lake bronze table."
• "What are the key differences between Snowflake's micro-partitioning and traditional database indexing?"

Core Software Engineering & OOP

Unlike traditional database administrators, a modern Data Engineer at Infosys is expected to write production-grade software. You must demonstrate strong programming fundamentals in Python or Java.

Be ready to go over:

• Object-Oriented Programming (OOP) – Designing modular, reusable code using classes, inheritance, encapsulation, and design patterns.
• Data Structures & Algorithms – Working with arrays, dictionaries/maps, sets, and basic search/sort algorithms to manipulate data efficiently in memory.
• API Development – Building and consuming RESTful APIs, understanding HTTP methods, and working with frameworks like Spring Boot or FastAPI.
• Advanced concepts (less common) – Multi-threading vs. multi-processing in Python, memory management, and custom exception handling in data integration pipelines.

Example questions or scenarios:

• "Design a set of Python classes to represent a generic data ingestion framework that can read from both API and S3 sources."
• "Write a function to merge two sorted lists of dictionary objects based on a specific key, maintaining the sorted order."
• "Explain how you would utilize dependency injection in a Java-based data processing application."

As a Data Engineer at Infosys, your daily activities will span the entire data lifecycle, from initial ingestion to downstream consumption. You will be responsible for:

• Designing and Developing Pipelines – Building scalable, fault-tolerant ETL/ELT pipelines using Python, Java, SQL, and PySpark to ingest structured, semi-structured, and unstructured data.
• Optimizing Data Platforms – Configuring and tuning big data environments, including Databricks clusters, Delta Lake storage, and cloud data warehouses, to ensure optimal performance and cost efficiency.
• Building Backend Services – Developing robust backend APIs and microservices using frameworks like Spring Boot or Python to expose processed data to downstream applications and business users.
• Implementing Data Governance – Ensuring data quality, security, and compliance by implementing validation frameworks, data masking, and access control policies across all pipelines.
• Collaborating in Agile Teams – Participating actively in sprint planning, design discussions, code reviews, and daily stand-ups to deliver high-quality data solutions in partnership with QA, DevOps, and product teams.

To be competitive for a Data Engineer position at Infosys, you should possess a strong blend of academic foundation, professional experience, and technical mastery.

• Must-have skills – 3 to 5 years of professional experience in data engineering or software development; strong proficiency in Python or Java (Java 8 or above); deep understanding of OOP concepts, data structures, and algorithms; and advanced SQL scripting capabilities.
• Nice-to-have skills – Hands-on experience with Apache Spark/PySpark, Databricks, or Snowflake; familiarity with orchestration tools like Control-M or Azure Data Factory (ADF); exposure to containerization (Docker) and CI/CD pipelines; and experience working on AWS, Azure, or GCP.
• Education – A Bachelor's degree in Computer Science, Engineering, Information Technology, or a closely related quantitative discipline is highly preferred.

Q: How difficult are the technical interviews for a Data Engineer role at Infosys?

A: The interviews are generally rated as average to difficult. They are highly practical, focusing heavily on your live coding ability in SQL and Python/Java, along with your understanding of big data architecture. If you have solid foundational coding skills and hands-on experience with cloud data tools, you can navigate the process successfully.

Q: What is the typical timeline from the first technical interview to receiving an offer?

A: The interview rounds themselves move quickly, often concluding within 14 to 17 days. However, candidates occasionally report delays in the background verification (BGV) and final offer generation stages. It is highly recommended to maintain active communication with your designated recruiter throughout this period.

Q: Will I be expected to write code live during the interview?

A: Yes. You should expect at least one round that involves live coding. You will be asked to write SQL queries to solve complex data scenarios and write Python or Java code to solve algorithmic problems or demonstrate OOP principles.

Q: How are remote or hybrid work arrangements handled for this role?

A: Infosys operates on a project-by-project basis. While many data engineering roles offer hybrid flexibility, the exact requirements depend on the specific client you are aligned with and the security protocols of the project.

• Master SQL Window Functions: Ensure you can write complex queries using partition clauses, analytical functions, and CTEs without hesitation, as these are almost always tested.
• Be Ready for Trick Questions: Interviewers may ask technical trick questions, particularly around Spark performance tuning, lazy evaluation, or database locks. Take a moment to think through your answer logically before speaking.
• Understand Orchestration and Monitoring: Be prepared to discuss how you schedule, monitor, and debug pipelines in production. Mentioning specific experience with tools like Control-M, Airflow, or ADF will significantly strengthen your candidacy.

Securing a Data Engineer role at Infosys is an exceptional opportunity to work on highly complex, large-scale data challenges that drive meaningful digital transformations worldwide. By demonstrating a strong command of foundational software engineering, advanced SQL, modern big data frameworks like PySpark and Databricks, and cloud-native architectures, you can position yourself as a highly competitive candidate. Focused preparation on these core technical domains, combined with clear, structured communication, will make a significant difference in your interview performance.

As you plan your preparation strategy, analyzing compensation benchmarks can help you set realistic expectations for your upcoming discussions.

The compensation data above reflects the competitive salary ranges offered for Data Engineer positions at Infosys across various regions and experience levels. Your final compensation package will be determined based on your technical performance in the interviews, your years of relevant experience, and the specific location of the role. For additional preparation resources, practice coding challenges, and deeper community insights, you can explore further interview preparation materials on Dataford to ensure you are fully equipped to succeed.