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REQUIREMENT_ID_1347 • 3-DAY_ACTIVE_POLICY JD

Data Analyst

Company
Company Cognizant
Type
Opportunity Type Internship
Salary
Stipend / Salary 6-9 LPA
Location
Location CHENNAI, India
Posted Date
Posted Date Yesterday
Apply on Official Website ↗
Python Pandas NumPy SQL Data Visualization LangChain LangGraph Large Language Models Prompt Engineering Data Pipeline Development Git Agile Methodology Problem Solving
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Aptitude and Reasoning Practice Open Resource ↗
Curated questions to sharpen quantitative, logical and verbal reasoning skills essential for Cognizant's online assessment.
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Cognizant Recruitment Process Insights Open Resource ↗
First‑hand experiences and tips on navigating Cognizant's multi‑stage recruitment journey.
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Cognizant Interview Preparation Guide Open Resource ↗
Comprehensive guide covering typical interview questions, coding challenges, and HR round expectations for Cognizant roles.
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Algorithm and Data Structure Problem Set Open Resource ↗
Extensive collection of coding problems to practice algorithmic thinking and Python implementation for technical interviews.

Bachelor’s degree in Computer Science, Information Technology, Electronics, Statistics, Mathematics or related field (or equivalent postgraduate degree). Minimum aggregate of 60% (or 6.0 CGPA) in the final year. No active backlogs; maximum of 2 backlogs allowed at the time of graduation. Candidates graduating in 2024, 2025 or 2026 are eligible. Strong analytical mindset and good communication skills are mandatory.

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Round 1: Online Assessment (aptitude, logical reasoning, coding in Python)
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Round 2: Technical Interview (deep dive into Python, data pipelines, AI/LLM concepts)
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Round 3: HR Interview (fit, communication, career aspirations)
Cognizant is a global leader in digital, technology, consulting and operations services. With a presence in over 40 countries, the company helps enterprises across industries transform their business models using AI, cloud, and analytics. Cognizant’s AI Builder practice focuses on turning AI investments into measurable business value, delivering end‑to‑end solutions that blend deep industry knowledge with cutting‑edge technology. The organization promotes a culture of continuous learning, diversity, and social responsibility, encouraging employees to innovate responsibly and contribute to sustainable outcomes. The Data Analyst role is a hybrid, day‑shift position that sits at the intersection of data engineering, analytics, and generative AI. Reporting to the Analytics Lead, the analyst will design, build, and maintain Python‑based data pipelines, embed responsible AI practices, and create LangChain and LangGraph workflows that enable automated insight generation. The role demands a strong grasp of large language model fundamentals, prompt engineering, and the ability to translate complex data into actionable business recommendations while adhering to governance standards. Key Responsibilities: 1. Collect, clean, and structure large enterprise data sets using Python, ensuring data quality for reporting and forecasting. 2. Design reusable, scalable data pipelines that handle ingestion, transformation, and validation. 3. Build generative AI workflows that leverage LLMs for text summarization, knowledge extraction, and automated reporting. 4. Implement model‑context protocol integrations to manage prompts, context windows, and tool connections reliably. 5. Develop and maintain LangGraph workflows that orchestrate multi‑step AI processes with clear graph structures. 6. Create LangChain agents that securely connect language models to internal data sources for advanced querying. 7. Perform exploratory analysis on structured and unstructured data to surface trends, anomalies, and growth opportunities. 8. Collaborate with product, engineering, and operations teams to define analytical requirements and align deliverables with strategic goals. 9. Establish data quality checks, performance metrics, and comprehensive documentation for all solutions. 10. Mentor junior analysts on Python best practices, prompt design, model evaluation, and data storytelling. Tech Stack: Python (Pandas, NumPy, PyTest), SQL, Git, Docker, LangChain, LangGraph, Large Language Models (e.g., GPT‑4), Azure/AWS cloud services, Tableau/PowerBI for visualization. Growth Path: Analysts can progress to Senior Analyst, Analytics Consultant, AI Solutions Architect, or Product Manager roles, with opportunities to lead cross‑functional AI projects and contribute to Cognizant’s AI research initiatives. Why Join Cognizant? The company offers exposure to world‑class AI platforms, a collaborative hybrid work environment, robust learning programs, and a commitment to ethical AI. Employees benefit from mentorship, global mobility, and a clear career ladder that rewards technical expertise and business impact.

Cognizant — Data Analytics & SQL Interview Guide

Previously asked questions, exam syllabus, coding benchmarks & round strategy.

APTITUDE & LOGIC 📖
Aptitude Practice Questions & Online Mock Tests

Curated logical, quantitative, and verbal reasoning problems to sharpen reasoning skills required for the initial screening test.

Open Resource ↗
COMPANY GUIDE 🎯
Cognizant Interview Preparation Corner

Comprehensive guide covering typical interview formats, common questions, and preparation tips for Cognizant and off-campus tech roles.

Open Resource ↗
MOCK TESTS & PAPERS 📝
Comprehensive Interview Prep Resources & Syllabus

Collection of previous year questions, company-specific test patterns, and interview experiences for technical and HR rounds.

Open Resource ↗
CODING PRACTICE 💻
Algorithm and Data Structure Problem Set

Practice problems to improve coding proficiency and algorithm problem-solving speed for technical rounds.

Open Resource ↗
Round 1: Online Assessment (OA)
Aptitude, Quantitative Logic & 2 Coding Problems
Focus on accuracy and speed. Practice arrays, strings, and standard arithmetic puzzles.
Round 2: Technical Interview 1
Core Tech Stack (Python, Pandas, NumPy, SQL, Data Visualization, LangChain, LangGraph, Large Language Models, Prompt Engineering, Data Pipeline Development, Git, Agile Methodology, Problem Solving) & Live Code Tracing
Explain your thought process aloud. Analyze time & space complexities before coding.
Round 3: System Design & Problem Solving
Database Schemas, APIs & Architecture Basics
Clarify edge cases, diagram schemas cleanly, and discuss scalability trade-offs.
Round 4: HR & Cultural Fit Discussion
Cognizant Core Values, Learning Agility & Offer Terms
Demonstrate passion, strong communication, and readiness for full-time collaboration.
What is the difference between WHERE and HAVING clauses in SQL? Answer ▼
Model Answer: WHERE filters rows before any groupings are applied, while HAVING filters aggregated groups after GROUP BY has executed.
Explain SQL Window functions: ROW_NUMBER(), RANK(), and DENSE_RANK(). Answer ▼
Model Answer: ROW_NUMBER() assigns unique sequential integers. RANK() assigns identical ranks to ties and skips ranks. DENSE_RANK() assigns identical ranks to ties without skipping rank numbers.
How do you handle NULL and missing values during data cleaning in Python/Pandas? Answer ▼
Model Answer: Use .isna().sum() to identify missing values. Impute with mean/median using .fillna() or remove with .dropna(subset=[...]) depending on variance impact.
What is the difference between Star Schema and Snowflake Schema in Data Warehousing? Answer ▼
Model Answer: Star Schema has denormalized dimension tables directly connected to the central Fact table. Snowflake Schema normalizes dimension tables into sub-dimensions to minimize redundancy.
How do you calculate MoM (Month-over-Month) growth in SQL? Answer ▼
Model Answer: Use LAG(revenue, 1) OVER (ORDER BY month) to fetch the previous month's revenue and compute (revenue - prev_revenue) / prev_revenue * 100.
Why do you want to join Cognizant as a Data Analyst?
Preparation Tip: Highlight Cognizant's market reputation, recent tech innovations, and how your skills in Python directly solve their team's objectives.
Describe a challenging bug or academic project roadblock and how you resolved it.
Preparation Tip: Use the STAR method: Situation (project context), Task (what needed solving), Action (specific tools/logic applied), Result (quantifiable positive outcome).
How do you handle strict deadlines or sudden scope changes?
Preparation Tip: Explain your prioritization strategy, proactive communication with mentors/peers, and agile mindset.

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