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Last Updated: Jun 20, 2024

TCS Digital Interview Questions and Answers

Author RAGHAV ANUSHA
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Introduction

TCS (Tata Consultancy Services) is a global IT service and consulting company. It is based in India and has expanded to over 50 countries worldwide. It provides services in various domains, such as software development, IT consultation, and business process services.

Interview Questions for TCS digital role


TCS hires college students for the digital role, wherein there are three rounds of interviews within two days. These rounds are designed to check the efficiency and skills of the candidates. The first round is a technical interview, the second is a managerial interview, and the third is an HR interview.    

Salary

The annual income for the digital role is not fixed. It depends on various factors, such as your skillset and your performance in the interview. The table below shows the average salary for a digital role - 

DesignationAverage salary (per annum)
TCS digital roleINR 7,00,000 - INR 7,50,000

Note that the salaries offered and the in-hand value of wages is different and may vary from year to year.

TCS Digital Interview Questions for Freshers

Given below are some beginner-level tcs digital interview questions - 

1.What is Blockchain technology?

Blockchain technology is a database mechanism that securely and transparently records transactions. It operates on a network of computers. It is divided into blocks that store data; these blocks are connected by a chain. Blockchain technology is used in various industries, such as finance and healthcare.


2. What is Machine Learning?

Machine learning is one of the many applications of AI. It focuses on developing programs and algorithms. These algorithms enable machines to learn and improve their performance on various tasks. Machine learning is an essential problem-solving tool in computer vision, social media, and image recognition.    


3. What is Deep Learning?

Deep learning is an application of Machine learning or AI. It uses computer programs and algorithms inspired by the human brain; these algorithms process complex data, such as audio, text, and images. Deep learning allows a system to learn and improve its performance. It is used for various applications, such as composing music, image coloring, and healthcare.


4. What is Cloud Computing?

Cloud computing is an on-access model. It delivers IT services via the internet. It offers access to shared computing resources such as networking and storage databases. With internet access, cloud computing allows users to use the same applications and resources from anywhere and anytime. This enables users to store, process, and manage data remotely.


5. What is Cyber Security?

Cyber security protects computer networks and sensitive data from unauthorized access. Knowing the different threats and methods for ensuring a safe online experience is essential. Several cyber security measures help us protect our data, such as firewalls and antivirus software.   


6. What is Big Data Analytics?

Big data analytics is the process of using analytics techniques to manage vast data sets. It helps organizations to make informed business decisions. Big data analytics aims to turn raw data into useful information that organizations use to increase efficiency. It is used in several industries, such as transportation and finance.


7. What are linked lists?

Linked lists are data structures containing nodes. The first and last nodes in the linked list are called a head and a tail, respectively. We use linked lists to store data. Linked lists are used for various applications, such as scheduling algorithms and database indexing.


8. What is the JSON format?

JSON stands for JavaScript Object Notation. It uses human-readable text to store data and transfer objects. It is used to transfer data between different applications via the internet. Let's look at an example of JSON format - 

json
{
	“name”: “Ninja”,
	“city”: “Delhi”,
	“age”: “19”,
}


9. What is Exception Handling?

Exception Handling is a computer programming mechanism. It lets us identify, handle, and resolve errors during program execution. We use exception handling to prevent our program from crashing abruptly. Exception handling ensures that the code is error-free and gives the desired output.        

 

10. What is the difference between a graph and a tree?

Graphs and trees are important data structure concepts used in computer programming. Let's look at the differences between a graph and a tree - 

GraphsTrees
A graph is a collection of nodes that are connected by edges.A tree is a popular data type that represents a tree-like structure. 
Graphs are used for network flow problems and finding the shortest path between two nodes.Trees are used for search algorithms and hierarchical relationships.
Graphs are complex and sometimes difficult to understand. Trees are more structured as they do not have cycles. 
Graphs can be both directed and undirected.Trees are undirected.
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TCS Digital Interview Questions for Intermediate Level 

Given below are some intermediate-level tcs digital interview questions -


11. What is the agile methodology for software development?

The  Agile methodology for software development is an approach that focuses on flexibility and adaptability. It is based on principles focusing on communication, feedback, and the finished product. Agile development is gradual and divided into small tasks. It involves regular meetings to review the progress and accommodates new requirements. The goal of the agile methodology is to deliver working software quickly while being able to incorporate user feedback.  

Stages of an Agile Model - 

The agile software development process is incremental and iterative, so the software is developed in steps. We can only start the next step once the previous one gets completed. Given below are the stages of an agile development mode.
 

  • Requirement fetching.
     
  • Designing and Development.
     
  • Testing.
     
  • Deployment.
     
  • Maintenance and feedback.


The agile model also includes regular meetings, known as sprint meetings. Sprint meetings help the team to reflect on their progress, what has been achieved, what work is left, and how we can improve the software.      


12. What is microservice architecture?

Microservice architecture is a software design architecture. It divides large applications into small and independent services; these services communicate through APIs and can be developed, tested, and deployed independently. Microservices architecture provides several benefits, such as increased scalability and efficient testing and deployment. 
See more, Kotlin Interview Questions


13. What are the various cloud computing services?

Given below are the names of various cloud computing services - 

  • Infrastructure as a Service.
     
  • Platform as a Service.
     
  • Software as a Service.
     
  • Storage as a Service.
     
  • Integration as a Service.


14. What are the various security concerns in a web application?

Given below are the various security concerns in the web applications - 

  • Cross-Site scripting.
     
  • Information leakage.
     
  • Malicious file execution.
     
  • Denial of service attacks.
     
  • Cross-site request forgery.


15. What are the various data structures used for optimization and problem-solving?

The various data structures used for optimization and problem-solving are as follows - 

  • ArraysArrays are fundamental data structures used in programming. It stores elements in a contiguous block of memory, where the data type of all elements is the same.  
      
  • Linked listsLinked lists are data structures containing nodes. We use linked lists to store data. Linked lists are used for various applications, such as scheduling algorithms and database indexing.
     
  • StacksStacks are data structures that remove and insert elements in a last-in-first-out order. LIFO order means the last element inserted in the stack will be the first to get removed.
     
  • Graphs: A graph is a collection of nodes connected by edges. Graphs are used for network flow problems. They are also helpful in finding the shortest path between two nodes.
     
  • Trees: A tree is a popular data type representing a tree-like structure. Trees are used for search algorithms and hierarchical relationships.


16. What is DevOps?

DevOps is a set of philosophies, practices, and cultural and operational approaches to software development. It aims to improve software delivery speed by streamlining software development and deployment. It helps organizations to adapt to changing business needs and enhance their IT systems' reliability.   


17. What are the various cloud computing platforms?

Given below are the various cloud computing platforms - 

  • IBM cloud.
     
  • Amazon Web Services (AWS).
     
  • Google Cloud Platform (GCP).
     
  • Microsoft Azure.
     
  • Oracle Cloud Infrastructure (OCI).


18. What are the benefits of a serverless architecture?

Given below are some of the advantages of using a serverless architecture - 

  • Cost efficiency: In serverless architecture, we only pay for the resources we use. This characteristic helps to reduce the overall cost and makes it more cost-efficient than traditional server-based models.
     
  • Security: Serverless architecture offers data encryption, access control, and limited attack surface. Thus, providing with increased protection.
     
  • Scalability: Serverless architecture allows us to scale our applications quickly. It provides us with dynamic scaling and increased efficiency. 
     
  • Reliability: Serverless architectures are reliable as they can automatically accommodate changing workloads. This characteristic reduces the risk of slow performance due to traffic or excessive use.
     
  • Flexibility: Serverless architecture allows us to build, develop, deploy, and maintain applications quickly.

     

19. What are REST and SOAP APIs?

The REST and SOAP APIs are web services that make communication between two systems possible over the internet. Let's look at these APIs one by one - 

  • REST APIREST or Representational State Transfer API is a protocol that uses HTTP requests and responses to communicate. It transfers data over the internet. REST APIs support several data formats, such as JSON and XML. It is used in modern web development as it is simple, fast, and efficient.
     
  • SOAP APISOAP or Simple Object Access Protocol API. It uses XML to structure the transferring data. It provides various features like data encryption and offers built-in error-handling options. It is secure and reliable and is used for complex problems.  

      

20. What is monolithic architecture?

Monolithic architecture is a software design architecture. The applications built using this architecture are a single, indivisible unit. Here, the components and functions are integrated into a single file. This feature makes it easier to manage, deploy, and maintain.

 

Must Read TCS CodeVita

TCS Digital Interview Questions for Advance Level 

Given below are some advanced-level tcs digital interview questions -


21. What are the differences between static and dynamic websites?

Given below are the differences between a static and a dynamic websites - 

Static WebsiteDynamic Website
The content of a static website can only be changed manually by a developer.The content of a dynamic website can be changed dynamically based on user-interaction.
Static websites are built using CSS, JavaScript, and HTML. Dynamic websites are built using PHP, Ruby, and ASP>NET apart from CSS and HTML. 
They are fast and easy to build. Dynamic websites are complex and challenging to build. 


22. What are NoSQL databases?

NoSQL stands for "Not Only SQL." It refers to databases that do not use SQL for managing data. A NoSQL DBMS stores large amounts of data, such as images and log files.


23. What are the various data structure algorithms?

Given below are few of the many data structure algorithms -

Search algorithms:

  • Linear Search.
     
  • Binary Search.
     
  • Exponential Search.
     
  • Interpolation Search.
     

Sorting algorithms:

  • Bubble Sort.
     
  • Selection Sort.
     
  • Quick Sort.
     
  • Merge Sort.
     

Dynamic Programming:

  • Matrix Chain Multiplication.
     
  • 0-1 Knapsack.
     
  • Longest common subsequence.
     
  • Longest increasing subsequence.
     

Greedy Algorithm:

  • Huffman Encoding. 
     
  • Shannon Fano Encoding.
     
  • Job scheduling problem. 


24. What is the use of Artificial Intelligence in today’s world?

Given below are the various applications of Artificial Intelligence in today's world - 

  • Customer Service: Various product-based companies use AI to create app chatbots. Chatbots are used to handle real-time complaints and requests.
     
  • Retail: AI is used to personalize the customer experience, improve supply chain management, and optimize pricing strategy.
     
  • Manufacturing: AI is used to improve efficiency, optimize production processes, and reduce wastage.
     
  • Gaming: AI is used in gaming to create advanced, challenging, and intelligent opponents and enhance the UI/UX of the game. 

 

25. What are the principles of cloud computing?

Given below are the various principles of cloud computing - 

  • Broad Network Access: Cloud computing allows users to use the same applications and resources anywhere and anytime with internet access. This feature enables users to store, process, and manage data remotely. 
     
  • Cost efficiency: We use cloud computing to eliminate the need to invest in expensive software and hardware.
     
  • Reliability: Cloud computing ensures the availability of resources and the security of data.
     
  • Security: Cloud computing offers various measures to protect data against cyber-attacks, data breaches, and threats.
     
  • Agility: Cloud computing allows organizations to adapt to the ever-changing demands and technologies. Agility helps the organization to develop and grow.


26. What are the various cloud-computing deployment methods?

Given below are the various cloud-computing deployment methods -

  • Public Cloud: A public cloud is accessible to anyone with internet access. A third-party service provider owns and operates a public cloud.
     
  • Private Cloud: An organization owns, manages, and operates a private cloud.
     
  • Hybrid Cloud: A hybrid cloud combines principles of both public and private clouds. 
     
  • Community Cloud: A community cloud is a shared space operated by a community or a group of organizations.


27. What are the applications of a Database Management System?

DBMS is a valuable tool for storing and accessing large amounts of real-time data. The applications of DBMS can be seen in a wide range of industries. Let's take a look: 

  • Healthcare: DBMS is used in hospitals to store patient data, information about medical treatments, medical histories, and employee data. 
     
  • Banking and Finance: It is used in banking and finance to store the details about customer accounts, withdrawals, and credits. It ensures that the financial status of the customers is secured, updated, and managed efficiently.
     
  • Education: Schools and universities use DBMS to manage student data and academic records to track student performance.
     
  • Transportation: It is used in this industry to manage transportation schedules and operations that help organizations improve customer satisfaction.


28. What are the principles of Object-oriented programming?

Given below are the various principles of object-oriented programming -

  • Encapsulation: This principle ensures that the internal working of an object is hidden from the outside world.
     
  • Abstraction: This principle allows developers to choose what the viewers will see. 
     
  • Polymorphism: This principle enables objects to take multiple forms. It treats an object as an instance in a parent class.  
     
  • Inheritance: This principle is a mechanism for creating new objects.


29. What is horizontal scaling?

Horizontal scaling is an approach to scaling a computer system to handle an increasing workload. It refers to the addition of multiple nodes and instances to a network. Horizontal scaling divides the workload between various resources. This feature improves its handling capacity and processing power. It is considered to be more flexible and cost-effective. 

 

30. What is vertical scaling?

Vertical scaling refers to increasing the resources of a system or machine to improve its handling capacity and processing power. It involves increasing the size of a single resource, such as upgrading the hardware. Vertical scaling aims to improve the system's performance by increasing resource capacity.

Conclusion

This article discussed the TCS digital interview questions at beginner, intermediate, and advanced levels. If you want to dig deeper into this topic, here are some related articles - 

You may refer to our Guided Path on Code Studios to enhance your skill set on DSA and many more. Check out essential interview questions, practice our available mock tests, and so much more!

Check out TCS NQT Recruitment Process and TCS Interview Experience to learn about TCS’s hiring process.