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How to Become a TCS Data Analyst

Data analytics is like solving a big problem, where each piece of data gives you a clear picture. With the help of data analysts, companies can find information on products, customers, trends, etc. Becoming a data analyst at top companies like TCS is an exciting and cheerful experience. In this article, we will share the steps of how to become a successful data analyst at TCS, from learning the right skills to getting hired for a dream job.

About TCS

Tata Consultancy Services Limited is another member organization affiliated with the Tata Group of India, which has emerged among the leading information technology companies in the country. Apart from employees’ performance and corporate social responsibility, the retention strategies practiced by TCS include career planning for long-term employment and opportunities for an excellent work-life balance. Tata Consulting is a consulting services company that has consultants throughout the world and currently has more than 488000 consultants in 46 countries and has been awarded the title of Global Top Employer thereby signifying its concern for talent development. The total IT annual sales of TCS for the fiscal year 2023 are roughly a billion dollars worth. Rs. 6422 trillion which in US dollars is equivalent to approximately 22 billion US dollars. It is a fast-growing organization, and the relatively high market capitalization of the firm offers employees interesting opportunities for career growth and development.TCS Data Analyst Interview Process With the expansion of the multinational IT solution company Tata Consultancy Services across the world, the opportunity has increased for data analyst profiles as well.

TCS NQT Interview Round

The TCS online test which is divided into the TCS National Qualifier Test is part of the TCS recruitment process and is the first and the toughest part in the process. This ability test also determines one’s numerical, verbal, and reasoning aptitudes as well as assessing the programmers in the languages of C, C++, Java, Python, PERL, etc. Passing the written examination in the NQT round takes candidates to the TCS NINJA Technical Interview.

Numerical Ability: Checks your knowledge of the mechanisms of work with numbers, simple calculus, statistical calculation, as well as the analysis of data. It is the ability to with numbers, simple calculus, etc. The following techniques can be used to make your numerical calculation strong:

  • Practice basic maths: Use online resources to work on your maths and brush up on basic arithmetic, and algebra.
  • Learn Statistics: Put the focus on kep components like mode, median, variance, etc. Use tolls like Excel or statistical tools.
  • Financial Calculation: Learn to perform financial calculations like net present value (NPV), internal rate of return (IRR), and other financial metrics.

Verbal Ability: Designed to test English grammar, usage, reading level as well as overall competence in the language. The following techniques can be used to make your verbal ability strong:

  • Use grammar tools to make your writing skills strong.
  • Practice reading comprehension.
  • Enhance your vocabulary skills. Learn new words and then work on sentence formation
  • Summarize what you’ve read to improve your understanding and retention.

Reasoning Ability: Measures students’ ability to solve problems; their rationality and judgment, ability to reason in propositions, and visualize figures and objects.  The following techniques can be used to make your Reasoning Ability strong:

  • Solve logical puzzles like sudoku to brainstorm your brain.
  • Take reasoning tests or mocks online.
  • Read books based on research which will enhance your critical thinking
  • Make command of pattern recognition exercises

TCS Data Analyst Technical Interview

Technical interview is an important phase of the selection process wherein coding abilities, data structures, algorithms, databases, operating systems, networking, and programming languages are assessed. The technical tasks may involve writing code and explaining the project to others.

You might encounter questions like:

Explain breadth-first search (BFS)

– BFS stands for Breadth-First Search, and it is a searching algorithm that is utilized to search for elements in data structures like trees, graphs, and other similar structures. This algorithm explores all the nodes at the present level before moving all the nodes to the next level.

Example: Use a real-world analogy, such as exploring a building floor-by-floor, where you visit all the rooms on one floor before going to the next floor.

What is the Java Development Kit (JDK)?

– Java Development Kit or JDK is a collection of tools that is used for developing Java applications. The main components of JDK are:

  • Java Compiler (javac): Converts Java source code into bytecode.
  • Java Runtime Environment (JRE): Provides libraries and JVM to run Java applications.
  • Java Debugger (jdb): Helps in debugging Java programs.
  • Additional Tools: Includes tools like Javadoc, which generates documentation from source code comments.

What is the Java Virtual Machine (JVM)?

– Java Virtual Machine is a software program that converts Java code into other forms so that it can be executed on any device. The components of JVM are:

  • Class Loader: Loads Java classes into memory.
  • Bytecode Verifier: Ensures bytecode is correct and doesn’t violate security constraints.
  • Interpreter: Converts bytecode to native machine instructions.
  • Just-In-Time Compiler (JIT): Improves performance by compiling bytecode to native code at runtime.


Moreover, for most of the knowledge-based questions, you will be required to solve problems and write code on paper, which will prove your practical skills with programming languages, which can be essential for the particular position.

TCS Data Analyst Managerial Interview Round

The HR interview generally consists of the candidate providing background information about himself, strengths/weaknesses, and interest in working for TCS. Always expect to talk about your work experience and employment, education, and personal activities or interests. The senior members get to evaluate your performance in the technical aspects, capacity to manage, and compatibility with the company culture in this round. Practice answers for hypothetical questions related to your experiences and accomplishments as well as your problem-solving and management skills in technical and organizational areas. 

Typical questions include:

– Introduction: State your name, age, marital status, nationality, occupation, and anything else you wish to share about yourself.

– What are the reasons for choosing the IT field for your job?

– What indeed induced you to join this company which is TCS?

– Would you like to work outside your current position and be ready to travel?

A precise interview with the HR department is important and must be the last step before getting the job. The interviewer should be friendly, cheerful, and confident, and should also be able to smile and make a lot of eye contact with the candidate. This round aims at assessing your ways of solving issues, leadership qualities as well as the values of TCS’scorporate culture.


The TCS Data Analyst entrance examination is a serious business and therefore getting a job in this position needs hard work and proper training. The parameters of success broadly include confidence, an apt knowledge of the technicalities, and managing to remain calm during interviews. Make sure to see how you will relate to the experience you have with what the job is offering you, and ensure that you have read about the company and its beliefs. Ensure you are filled with self-confidence and research on technical topics. Lastly, make sure your resume is error-free and showcases your rightexperience. By following these steps, the landing of a job at TCS increases.

If you’re looking to enhance your skills and gain practical experience, consider enrolling in the comprehensive Data Analytics course offered by Ethans Tech. This course provides in-depth training and hands-on projects to help you succeed in your data analysis career.

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