Most Common TCS Interview Questions & Answers For Freshers & Experienced in 2024

The IT industry has rapidly expanded in recent years, particularly in India. However, only a few companies can offer their employees a promising long-term career. This is why many individuals prefer to align themselves with well-established and renowned companies.

With more than 6,00,000 employees operating from 46 different countries across the globe, TCS continues to offer a reputed career to aspirants aiming to become a part of this Indian MNC. To secure your spot and embark on a rewarding career at TCS, thorough preparation is key. 

Whether you are a fresher or an experienced professional looking to join TCS, the interview process can be exciting and nerve-wracking. In this blog, we will provide you with valuable insights into the most common TCS interview questions and answers in 2024. 

And for those seeking extra help, courses like upGrad’s Professional Certificate in Global Business Management can be advantageous. Let’s get started with the interview questionnaire to help you ace the TCS interview!

TCS Interview Process

The technical Interview process varies depending on whether you are applying for a Ninja or Digital profile at TCS.

For the Digital profile, you can expect a round where you will be quizzed on Competitive Programming, Data Structures and Algorithms. Additionally, a solid understanding of trending technologies like Data Science, Big Data, Cloud, IoT, etc., will be crucial. 

On the other hand, for the Ninja profile, the TCS NQT Interview will focus on knowledge of specific technologies and programming languages that candidates are familiar with. The questions will cover basic programming paradigms, algorithms, and other core concepts related to the chosen domain.

There are four steps in the TCS interview process.

  • Written Exam

The written test for the TCS NQT lasts 60 minutes. It comprises four sections: Quantitative Aptitude, Programming Language Efficiency, Coding Test, and E-mail Writing.

  • Technical Interview

This face-to-face interview will extensively evaluate your technical knowledge, background, and primary projects. You can expect a wide range of questions covering data structures and algorithms, database management systems, networking, object-oriented programming concepts, and proficiency in a programming language of your preference.

  • Managerial Interview

During the managerial round, you will face a panel of senior members in a face-to-face interview setting. This stage may consist of technical questions, managerial inquiries, or a combination of both, depending on the profile you have applied for. You can expect questions that assess your problem-solving approach and how you manage the pressure. 

  • HR Interview

During the HR interview round, you can expect questions that cover various aspects of your background. TCS HR interview questions about your strengths, weaknesses, reasons for applying to the company, and why you are the ideal candidate. You may also be asked about your work experience, education, interests, and family background. 

Academic Criteria

To be eligible for consideration, candidates must maintain a minimum of 60% throughout their degree without backlogs. In the case of a two-year career gap, applicants may still be considered, provided they offer a valid explanation.

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TCS Technical Interview Questions 

In the TCS Technical Interview, candidates can expect challenging questions that delve into their technical knowledge and problem-solving abilities. Here are some TCS interview questions for freshers:

Q. What is Socket Programming? 

Ans. Socket programming facilitates communication between two network nodes by establishing a connection. One socket, acting as a node, listens on a specific port at an IP address while the other socket connects to it. In this process, the server creates the listener socket when the client establishes a connection.

Q. Explain two integrity rules used in DBMS.

Ans. Referential integrity rules ensure that the database maintains consistency by preventing the existence of orphan records with foreign key values. When a primary key value is used as a foreign key in a child table, it cannot be modified, ensuring data integrity.

In contrast, entity integrity rules dictate that the primary key value must not be kept null, ensuring that each entity in the database has a unique identifier, promoting data accuracy and completeness.

Q. Explain the fundamental principles of OOPS?

Ans. Object-Oriented Programming System is built upon four fundamental principles, each contributing to the design and functionality of the system:

  • Abstraction: It involves concealing the internal implementation details of an object and exposing only its essential functionalities to the user. An analogy can be drawn with sending an SMS, where the user interacts with a simple interface to type and send a message without being aware of the complex processes behind message delivery.
  • Inheritance: It is a process through which an object inherits all the characteristics of a parent object. It promotes code reusability and simplifies the implementation of new classes by inheriting characteristics from existing ones.
  • Encapsulation: It involves bundling code and data within a solo unit, similar to a capsule containing various medicines. This approach ensures that the internal state of an object is hidden from external interference and can only be accessed through well-defined interfaces, enhancing data security and preventing unwanted modifications.
  • Polymorphism: It allows a single action to be performed in multiple ways. In Java, polymorphism enables the use of different methods to achieve a common goal, promoting flexibility and extensibility in the design of the Object-Oriented Programming System.

Q. What do you mean by subnet mask?

Ans. The subnet mask determines the network and host parts of an IP address. It helps computers identify whether an IP address is on the same network. Subnetting divides a network into smaller subnets with unique IP addresses and masks, enabling better traffic control, IP conservation, and network segmentation for enhanced security. For instance, separate subnets can be created for DMZ and internal networks.

Q. Explain piggybacking?

Ans. In a two-way communication system, the receiver returns an acknowledgment (ACK) to the sender after getting data packets. However, instead of immediately sending the ACK, the receiver waits until the next data packet is received by its network layer. The ACK is then combined with the incoming data frame, a process known as piggybacking, where it is attached to the next outgoing data frame. 

This technique helps optimise communication efficiency by reducing the number of separate control frames and enhancing data transmission flow.

TCS Coding Interview Questions and Answers

Q. Describe the right way to inherit the variables of one class to another.

// Base Class
class A
    public int a;
// Derived Class
class B : A
    public B()
        a = 15;

Q: Group the 1s together and the 0s together in a single scan of an array of 1s and 0s. Improve the boundary circumstances.

#include <stdio.h>
int main() {
    int A[] = {0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0};     int x = 0, y = sizeof(A) / sizeof(A[0]) - 1; 
    while (A[x])
    while (A[y])
    if (A[x] && !A[y]) {
        A[x] = 0;
        A[y] = 1;
    // Print the array after swapping
    for (int i = 0; i < sizeof(A) / sizeof(A[0]); i++) {
        printf("%d ", A[i]);
    return 0;

Q. Give a function to swap two numbers without the usage of a temporary variable.

void swap(int &i, int &j)  


Q. Write a C programme to swap two numbers without using a third variable.

     * C++ program to swap two numbers without using a temporary variable 
    using namespace std;

   /* Function for swapping the values */  
    void swap(int &a, int &b)  
        b = a + b;  
       a = b - a;  
        b = b - a;  
    int main()  
    int a, b;

cout << "Enter two numbers to be swapped : "
cin >> a >> b;  
swap(a, b);  
cout << "The two numbers after swapping become :" << endl
cout << "Value of a : " << a << endl
cout << "Value of b : " << b << endl

Q. What is the RR Scheduling Algorithm in OS?

The RR (Round-Robin) Scheduling Algorithm is utilised in operating systems for process scheduling. It is specifically designed to handle processes with equal priority. The algorithm allocates each process a time slice, representing the time the process can run on the CPU before being preempted. 

Typically, the time slice is set to a small value, ensuring all processes receive a fair share of CPU time and preventing any single process from monopolising resources.

TCS Interview Preparation Tips

To confidently tackle TCS ninja interview questions, thorough and strategic preparation is essential. Candidates are encouraged to research the company extensively to align their responses with its specific requirements. 

Familiarising themselves with the most anticipated TCS interview questions and crafting well-prepared answers will enable them to handle challenging inquiries tactfully.

Moreover, You can also enhance your resume with top-notch courses like upGrad’s Master of Science in Business Analytics from Golden Gate University. It adds up other relevant qualifications and helps you excel in any interview with flying colours.


To summarise, excelling in interviews requires meticulous preparation, especially for a technical position. Thoroughly researching the company, practising interview questions and showcasing leadership and communication skills are essential steps to impress interviewers. Strengthening your resume with leading courses like upGrad’s Advanced Certificate in Supply Chain Management from IMT Ghaziabad will further enhance your chances of becoming an excellent industry candidate!

Frequently Asked Questions

How can I prepare for the TCS ninja interview?

Research the company and its services, practice coding, problem-solving, and technical questions, and prepare behavioural and situational interview responses.

What are the rounds in TCS for experience?

TCS follows a multi-round selection process for experienced candidates, typically including technical, managerial, and HR rounds.

What is the TCS selection process for 2024?

The TCS placement process typically consists of four rounds. The first round assesses aptitude, reasoning, and communication skills through a written test. The second round evaluates technical knowledge in a technical interview. Leadership abilities are evaluated in the third round, which is the managerial interview. Finally, the fourth round, the HR interview, focuses on assessing personality and cultural fit with the company.

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