TCS interview questions and topics for Ninja Digital and Prime

Preparing for a TCS interview in 2025 can feel challenging, especially since TCS offers multiple roles like TCS Ninja, TCS Digital, and TCS Prime—each requiring a different skill set. Whether you are a fresher stepping into your first job interview or an experienced professional looking for growth, understanding the interview process and common questions can make all the difference.

In this guide, we’ll cover:

• TCS Digital role important topics and questions.
• Best resources for TCS interview preparation 2025.
• The most asked TCS interview questions for technical and HR rounds.
• The differences between TCS Ninja, Digital, and Prime roles and how to prepare for each.

TCS NINJA Interview Questions With Answers

1. Tell me about yourself.
   “I am a recent Computer Science graduate with practical experience in programming languages such as Java and C++. I have worked on projects involving database management and web development, which helped me improve my problem-solving and coding skills.”
2. Explain your final year project.
   “My final year project was an online bookstore system developed using Java and MySQL. It enabled users to browse books, place orders, and manage inventory efficiently, and helped me understand client-server communication and database integration.”
3. What is Object-Oriented Programming (OOP)? Name its main concepts.
   “OOP is a programming paradigm where everything is represented as objects. The main concepts include encapsulation (hiding data), inheritance (reusing code), polymorphism (one interface, many forms), and abstraction (hiding complexity).”
4. Difference between C and C++.
   “C is a procedural programming language focused on functions, whereas C++ supports both procedural and object-oriented programming, allowing features like classes and objects.”
5. What is a tree in data structures?
   “A tree is a hierarchical data structure with nodes connected by edges, starting from a root node. Each node can have multiple children, used to represent data like file systems or organizational charts.”
6. What is the difference between an array and a linked list?
   “An array stores elements in contiguous memory locations, allowing fast access via indices. A linked list stores elements in nodes connected by pointers, allowing dynamic memory allocation but slower access.”
7. What is SQL? Explain normalization.
   “SQL is a language used to manage and manipulate databases. Normalization is the process of organizing data to minimize redundancy and dependency by dividing tables and defining relationships.”
8. What are the different types of keys in a database?
   “Keys include primary keys (unique identifier for records), foreign keys (link tables), candidate keys (possible primary keys), and composite keys (combination of fields).”
9. What are the OSI model layers?
   “The OSI model has 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application, each responsible for specific networking functions.”
10. What is encapsulation?
    “Encapsulation is the bundling of data and functions within a class and restricting access using access specifiers like private and public.”
11. Difference between inner join and outer join in SQL?
    “Inner join returns only matching rows between tables, while outer join returns matching rows plus unmatched rows from one or both tables.”
12. Write a code to check if a number is palindrome.
    “A simple method involves reversing the number and comparing it with the original.”
13. Write a code for the Fibonacci series.
    “Starting with 0 and 1, each subsequent number is the sum of the previous two.”
14. Difference between IPv4 and IPv6.
    “IPv4 has 32-bit addresses allowing about 4 billion addresses, while IPv6 uses 128-bit addressing providing a vastly larger pool.”
15. What is SDLC?
    “Software Development Life Cycle is a process for developing software through requirements, design, implementation, testing, deployment, and maintenance phases.”
16. What is your favorite programming language and why?
    “I prefer Java due to its platform independence, rich libraries, and object-oriented features.”
17. Are you comfortable relocating anywhere in India?
    “Yes, I am open to relocation as it offers new learning and growth opportunities.”
18. What inspired you to choose IT as a career?
    “I enjoy problem-solving and technology, and the IT industry offers continuous innovation and career growth.”
19. Rate your SQL/coding skills from 1–10.
    “I would rate myself 8 because I have completed several projects and online courses enhancing my skills.”
20. What are your strengths and weaknesses?
    “My strength is adaptability and quick learning. For weaknesses, I sometimes overthink details, but I’m actively working on prioritizing tasks better.

TCS Digital Interview Questions With Answers

1. What is Cloud Computing?
   Cloud Computing is a technology that allows users to access computing services like servers, storage, and applications over the internet (“the cloud”) rather than on local hardware. It offers scalability, cost-effectiveness, and ease of access, enabling businesses to manage resources dynamically.
2. What are the benefits of Cloud Computing?
   Key benefits include flexible resource scaling, cost reduction by paying only for what is used, improved collaboration via remote access, automatic software updates, and disaster recovery options to secure data integrity.
3. What are the Cloud Service Models?
   The three main cloud service models are Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS). IaaS provides virtualized computing resources, PaaS offers development platforms, and SaaS delivers fully operational software applications online.
4. What is Digital Technology according to TCS?
   TCS defines Digital Technology as an integration of data, cloud, intelligence (AI/ML), interconnectivity, and visual computing, driving business transformation and innovation.
5. Explain Machine Learning (ML).
   Machine Learning is a subset of AI where systems learn from data patterns to make decisions or predictions without explicit programming. Examples include recommendation systems and fraud detection.
6. What is Artificial Intelligence (AI)?
   AI refers to creating machines and systems that can perform tasks requiring human intelligence, such as problem-solving, language understanding, and image recognition.
7. What is Deep Learning?
   Deep Learning is a complex subset of Machine Learning involving neural networks with many layers, enabling computers to recognize patterns in vast amounts of data, such as in natural language processing.
8. What is Blockchain Technology?
   Blockchain is a decentralized ledger technology that enables secure, transparent, and immutable recording of transactions across a network of computers.
9. What is Big Data Analytics?
   Big Data Analytics involves examining large and complex data sets to uncover hidden patterns, correlations, and insights that support better decision-making.
10. What programming languages are commonly used in TCS Digital interviews?
    Candidates are expected to be proficient in languages like Java, Python, C++, and sometimes JavaScript due to their applicability in digital projects.
11. Explain object-oriented programming concepts used in TCS Digital interviews.
    Candidates should confidently explain concepts like classes, objects, inheritance, polymorphism, abstraction, and encapsulation with real-life scenarios.
12. What is Agile methodology?
    Agile is an iterative project management process emphasizing collaboration, customer feedback, and small, rapid releases for software development.
13. What is DevOps?
    DevOps is a cultural and technical approach that integrates software development (Dev) and IT operations (Ops) to increase the speed and quality of software delivery.
14. How does Google work on a search query?
    Google uses automated algorithms and bots called crawlers or spiders to index web pages based on keywords, relevance, and user location, providing ordered search results.
15. How do social media platforms manage their data?
    Social media platforms use large-scale distributed databases, real-time data processing, and analytics tools to manage massive amounts of user-generated content and interactions.
16. What is your experience with Artificial Intelligence or Machine Learning projects?
    Provide specifics about any projects or coursework involving AI/ML, such as sentiment analysis, chatbot development, or image recognition.
17. What is the difference between HTTP and HTTPS?
    HTTPS is a secure version of HTTP, using SSL/TLS protocols to encrypt communication between client and server, protecting sensitive data.
18. Describe a coding problem you solved in a previous interview or project.
    Discuss the problem, your approach, languages used, challenges faced, and how you optimized your solution.
19. Are you open to relocation and working in different shifts?
    Express flexibility and willingness to adapt to business requirements and company needs.
20. Why do you want to work in the Digital role at TCS?
    Highlight interest in cutting-edge technologies, digital transformation, and growth prospects within TCS Digital’s innovative environment.

TCS Prime Interview Questions With Answers

1. Tell me about yourself.
   “I am a Computer Science graduate with strong programming skills in Java and Python. I have worked extensively on projects involving data analysis and machine learning which sharpened my analytical and coding abilities.”
2. What are the pillars of Object-Oriented Programming (OOP)?
   “The four pillars are encapsulation, abstraction, inheritance, and polymorphism. Encapsulation hides data, abstraction hides complexity, inheritance allows new classes to reuse existing code, and polymorphism enables multiple implementations of methods.”
3. Is C++ an object-oriented language? Is it purely object-oriented?
   “Yes, C++ supports all four OOP pillars but it is not purely object-oriented because it allows procedural programming and has primitive data types outside classes.”
4. Explain your final year project.
   “My project involved building a predictive analytics system using Python and machine learning algorithms to forecast sales trends, which improved accuracy by 15% over traditional methods.”
5. Write a code snippet for binary search.
   “I can provide iterative and recursive implementations. For example, the iterative approach involves checking the middle element and dividing the search space until the target is found or list exhausts.”
6. What is the difference between stack and queue?
   “Stack is LIFO (Last In, First Out) where the last element inserted is removed first. Queue is FIFO (First In, First Out) where the first element inserted is removed first.”
7. What is indexing in databases?
   “Indexing improves data retrieval speed by creating pointers to the rows in a table. It’s like an index in a book that quickly directs you to the relevant pages.”
8. Explain SQL joins with examples.
   “Inner join returns rows with matching keys in both tables. Left outer join returns all rows from the left table and matched rows from the right. Right outer join is the converse.”
9. What is Cloud Computing?
   “It is the delivery of computing services like servers, storage, databases, networking, software over the internet, enabling on-demand access and scalability.”
10. Describe Agile methodology.
    “Agile is an iterative approach to software development focusing on collaboration, customer feedback, and quick releases. It values flexibility and responsiveness.”
11. Are you familiar with Machine Learning concepts?
    “Yes, I have experience with supervised and unsupervised learning algorithms, including regression, classification, and clustering techniques.”
12. What steps did you take to improve your coding skills?
    “I regularly solve problems on platforms like LeetCode and HackerRank and study data structures, algorithms, and system design.”
13. Why do you want to join TCS Prime?
    “TCS Prime offers advanced training and exposure to cutting-edge technologies. I want to grow in a challenging environment that nurtures innovation.”
14. How do you handle working under pressure?
    “I prioritize tasks, break problems into manageable chunks, and maintain clear communication to ensure deadlines are met without compromising quality.”
15. Do you have any certifications or internships?
    “I completed an internship on data analysis and hold certifications in Python programming and cloud fundamentals.”
16. What is polymorphism?
    “Polymorphism is the ability of objects to take many forms, allowing methods to behave differently based on the object calling them.”
17. Explain the difference between a tree and a graph.
    “A tree is a hierarchical structure with no cycles, while a graph is a collection of nodes where cycles and complex interconnections are allowed.”
18. Are you comfortable with relocating or shift work?
    “Yes, I am flexible and willing to relocate or work in shifts if required.”
19. How would you optimize a slow running SQL query?
    “I would analyze the query execution plan, add appropriate indexes, avoid unnecessary columns in SELECT, and optimize joins.”
20. Where do you see yourself in 5 years?
    “I aim to become a skilled software engineer specializing in AI and machine learning, contributing to impactful projects and leading teams.”