TCS Interview Questions and Answers

In this article we have gathered the latest and most asked TCS Interview Questions and Answers for both freshers and experienced.

TCS stands for Tata Consultancy Services. TCS is currently the second largest IT service provider in the world. It is an Indian multinational company that deals exclusively with consulting services and information technology. The headquarter of TCS is currently located in Mumbai, Maharashtra. It is one of the most trusted Indian brands across the world. In 2018, TCS was ranked 11th in the Fortune India 500 list and 64th among the Forbes Most Innovative Companies Worldwide (in 2015). TCS is one of the leading private sector employers in India. TCS hires freshers every year from all over India and outside India.

Every year, TCS conducts a mass recruitment process to select candidates for the profile of Assistant Software Engineer. Apart from the eligibility criteria, TCS wants its employees to be very good in aptitude and attitude.

Recruitment process in TCS

TCS conducts generally 3 rounds to select fresher as Software Developer in their organization.

• Aptitude Test
• Technical Interview
• HR Interview

The recruitment drive of TCS starts with a written test followed by face to face interview. A recruiter may also conduct campus group discussion for software engineer candidates.

In this article, we will discuss TCS Technical Interview Questions. These TCS Interview Questions will help job seekers to prepare well for the job interview and cross the panel discussion easily.

So let’s get started :

1. What is the primary difference between C and C++?
2. What are the four basic principles of OOPS?
3. Name four storage classes available in C.
4. What is inheritance?
5. Explain static variable.
6. What is Polymorphism?
7. Explain function overloading concept.
8. What do you understand by loops?
9. What is Database Management System?
10. What is an array?
11. Explain memory allocation in C.
12. What is data warehousing? Why should we use data warehousing?
13. Explain compiler and interpreter.
14. What is a user-defined exception in Java programming?
15. What do you mean by static identifier?
16. What is a Data Structure?
17. What will be output of the following code?
18. Differentiate between an Array and a Linked List.
19. Explain the difference between the foreign key and the referenced key.
20. What is software development life-cycle?

1. What is the primary difference between C and C++?

C++ can be said to be a superset of C. The major additional features in C++ are object-oriented programming, exception handling, and rich C++ libraries.

2. What are the four basic principles of OOPS?

The four basic principles of Object-Oriented Programming System are listed below:

• Abstraction: Abstraction is the process of hiding the details which are not important such as the implementation details and shows only those which are useful. The user can only see the functionality and not the inside working of the system.
• Inheritance: Inheritance is the property of the object-oriented paradigm in which one or more derived class inherits some of the properties of the base class.
• Encapsulation: Encapsulation is the process of wrapping up data in a single unit.
• Polymorphism: It is a property in which a single action can be performed in different ways.

3. Name four storage classes available in C.

The four storage classes available in C languages are:

• Register
• Auto
• External
• Static

4. What is inheritance?

Inheritance is the process of creating new classes from already existing classes. A coder can create a new class by taking some or all of their abilities from one or more existing classes. The already existing class is known as parent class or superclass and the class which is created from those parent class, i.e. the new class is known as child class or subclass. Subclasses can have their own characteristics and properties, they are not fully inherited from other classes.

5. Explain static variable.

Static variables have the property of preserving their value even after they are out of scope! Therefore, static variables preserve their original value in their previous scope and are not re-initialized in the new scope.

6. What is Polymorphism?

Polymorphism is a concept used in Object-Oriented Programming (OOPS). Polymorphism allows you to perform a single action in different ways.

7. Explain function overloading concept.

This is a feature of C++ that allows you to create more than one function with the same name. Functions can be identified using their parameters.

8. What do you understand by loops?

Loops are used to execute a block of statements multiple times in a program based on a conditional statement. For each successful execution of the loop, the conditional statement must be checked. If the conditional statement is true, the circuit will be executed. If the conditional statement is false, the course will be terminated.

9. What is Database Management System?

A Database Management System is a software system used to create and manage databases. DBMS makes it possible for the end user to create and maintain a database. DBMS provides an interface between the end user/application and the database.

10. What is an array?

An array is a data structure consisting of identical elements. A necessary condition for using an array is that all array elements must have the same data type.

11. Explain memory allocation in C.

There are three functions to allocate memory in C. They are as follows:

• calloc(): This function allocates memory and initializes this memory block to zero. It returns a pointer to the block of memory.
• malloc(): This function reserves a memory area, and it returns a pointer of void type.
• free(): This function release allocated memory.

12. What is data warehousing? Why should we use data warehousing?

A data warehouse is a business intelligence tool that stores data from operational databases as well as from external sources. It supports the decision making process in an organization.

We should use a data warehouse to ensure the consistency of the collected data. It also helps business leaders develop data-driven strategies.

13. Explain compiler and interpreter.

A compiler is a program that processes code written in C and converts it into machine language. An interpreter is a program that directly executes C code without compiling it into machine language.

14. What is a user-defined exception in Java programming?

The keywords try, catch, and finally are used to implement a user defined custom exception java. In Java, you can create an exception class and throw an exception using the throw keyword.

15. What do you mean by static identifier?

The static identifier is initialized only once and its value is retained during the lifetime of the application. A memory value allocated by a static variable can be used between function calls. The default value of an initialized static identifier is zero.

16. What is a Data Structure?

A data structure is a special way of organizing data in a computer so that it can be used effectively.

17. What will be output of the following code?

#include <stdio.h>
int main()
{
	int x = 10, *y, **z;
	
	y = &x;
	z = &y;
	printf("%d %d %d", *y, **z, *(*z));
	return 0;
}

Output: 10 10 10

18. Differentiate between an Array and a Linked List.

Arrays and Linked List can both be used to store similar types of linear data, but both have some advantages and disadvantages over each other.

19. Explain the difference between the foreign key and the referenced key.

20. What is software development life-cycle?

Software Development Life-Cycle is the steps involved in the life cycle of the software development phase. Generally, this is followed by the development team that develops the software in the organization. It includes a clear explanation of the development and maintenance of the software.

We hope these TCS Interview Questions help you in cracking your next TCS Technical Interview.

All The Best!

Disclaimer: The information provided in this blog post is based on general knowledge and research. The specific interview process and questions at TCS may vary. It is recommended to refer to the official TCS website and consult additional resources for the most up-to-date and accurate information.