Things you should know about TCS
- Establishment:
- Tata Consultancy Services (TCS) was established in 1968.
- Global Presence and Locations:
- TCS operates in over 149 locations across 46 countries, making it a prominent global player in the IT industry.
- Product Base or Service-Based:
- TCS is primarily a service-based company, offering a diverse range of information technology (IT) services and solutions.
- Founder Name:
- TCS was founded by Faqir Chand Kohli, who played a crucial role in the early development of the Indian IT industry.
- Services Provided (Common Interview Questions):
- TCS offers a comprehensive suite of services, including IT consulting, software development, business process outsourcing, digital solutions, and more.
- Main Headquarters in India:
- The main headquarters of TCS is located in Mumbai, India.
- Number of Employees:
- TCS has a massive global workforce, with a significant number of employees. As of my last knowledge update in January 2022, the number was over 500,000 employees.
- Revenue of the Company:
- As of now, Tata Consultancy Services (TCS) has a trailing twelve-month (TTM) revenue of approximately $28.66 billion. This represents a significant increase from the company’s revenue of $27.18 billion in 2022 and $24.93 billion in 2021. TCS’s revenue growth is driven by its strong global presence, broad portfolio of services, and continued focus on innovation. The company is well-positioned for continued growth in the years to come, as demand for IT services is expected to remain strong.
Recruitment Process
TCS engages in year-round recruitment through a combination of On-Campus and Off-Campus drives. The company administers various annual exams as part of its hiring process, such as:
- TCS NQT (National Qualifier Test)
- TCS Digital
- TCS Codevita
- TCS iON
Rounds
The typical pattern for most TCS drives consists of the following stages:
- TCS Online Assessment Exam
- Technical Interview
- HR/MR Interview
Interview Process
- TCS interview structure often involves a consolidated session, encompassing Technical, HR, and Managerial rounds.
- Alternatively, TCS may opt for a two-round approach, with one dedicated to Technical assessment and the other combining HR and Managerial evaluation.
Technical Interview questions for freshers
OOPS Based Questions
- Define Object-Oriented Programming (OOP) and its principles.
- Explain the concepts of encapsulation, inheritance, polymorphism, and abstraction.
- What is a class? How is it different from an object?
- What is the significance of constructors in OOP?
- Define and explain the concept of inheritance. Provide an example.
- What is method overloading? Can you provide an example?
- Describe the difference between method overloading and method overriding.
- Explain the concept of encapsulation and why it is important in OOP.
- What is polymorphism? How is it achieved in OOP?
- Differentiate between abstract classes and interfaces.
- What is an interface? How is it different from an abstract class?
- Discuss the advantages of using interfaces in Java.
- Explain the ‘super’ keyword in Java.
- How does Java support multiple inheritances through interfaces?
- What is the purpose of the ‘final’ keyword in Java?
- How does encapsulation improve the security of a system?
- What is a static method? How is it different from an instance method?
- Discuss the concept of method overriding in detail.
- What is the purpose of the ‘this’ keyword in Java?
- How would you implement a singleton class in Java?
- Explain the concept of composition in OOP.
- Discuss the ‘equals’ and ‘hashCode’ methods in Java. Why are they important?
- What is the purpose of the ‘instanceof’ operator in Java?
- Describe the SOLID principles and how they relate to OOP.
- Explain the concept of a design pattern. Can you provide an example?
TCS NQT Exam Pattern
- Section 1: Verbal Ability (30 minutes, 25 marks)
- Reading comprehension
- Grammer
- Vocabulary
- Section 2: Quantitative Ability (30 minutes, 25 marks)
- Data interpretation
- Number systems
- Arithmetic
- Section 3: Reasoning Ability (30 minutes, 25 marks)
- Logical reasoning
- Analogy
- Classification
- Section 4: Programming Logic (60 minutes, 25 marks)
- Programming concepts
- Problem-solving
- Coding
The NQT is a competitive exam, and candidates are shortlisted for the next round of the recruitment process based on their performance in the test.
Basic Data Structure Questions
- What is an Array?
- Define an array and explain its characteristics.
- What is a Linked List?
- Explain the concept of a linked list and its types.
- What is a Stack?
- Define a stack and explain its operations.
- What is a Queue?
- Define a queue and explain its operations.
- What is a Hash Table?
- Explain the concept of a hash table and its uses.
- What is a Tree?
- Define a tree and explain its types.
- What is a Graph?
- Define a graph and explain its types.
Basic Algorithms to revise
- What is Binary Search?
- Explain the binary search algorithm.
- What is Bubble Sort?
- Explain the bubble sort algorithm.
- What is Merge Sort?
- Explain the merge sort algorithm.
- What is the Time Complexity?
- Define time complexity and explain Big O notation.
- What is Recursion?
- Define recursion and provide an example.
- What is Dynamic Programming?
- Explain the concept of dynamic programming.
- What is Greedy Algorithm?
- Explain the greedy algorithm.
- What is an Algorithm’s Space Complexity?
- Define space complexity and its importance.
- What is the difference between a Queue and a Stack?