700+ TCS iON Interview Questions & Answers | Complete Prep Guide 2025

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Assistant System Engineer Trainee Interview Questions & Answers

Anonymous

posted on 13 Dec 2021

I applied via Company Website and was interviewed in Nov 2021. There were 4 interview rounds.

Interview Questionnaire

12 Questions

Q1. What is Encapsulation?

Ans.

Encapsulation is the process of hiding internal details and providing a public interface for accessing and manipulating data.

Encapsulation is a fundamental concept in object-oriented programming.
It combines data and methods into a single unit called a class.
The class encapsulates the data and provides methods to interact with it.
Access to the data is controlled through the class's public interface.
Encapsulation helps i...

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Q2. What is Polymorphism?

Ans.

Polymorphism is the ability of an object to take on many forms.

Polymorphism allows objects of different classes to be treated as if they were objects of the same class.
It is achieved through method overriding and method overloading.
Example: A parent class Animal can have child classes like Dog, Cat, and Cow. All these child classes can have their own implementation of the method 'makeSound', which is defined in the par...

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Q3. Give the difference between Interface and Abstraction?

Ans.

Interface defines the contract between a class and the outside world, while Abstraction provides a generalized view of an object.

Interface is a blueprint of a class that defines the methods and properties that a class must implement.
Abstraction is a concept that hides the implementation details and provides a generalized view of an object.
Interface is used to achieve multiple inheritance in Java.
Abstraction is used to ...

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Q4. What is Multiple Inheritence?

Ans.

Multiple Inheritance is a feature in object-oriented programming where a class can inherit properties and behavior from multiple parent classes.

A class can inherit from more than one class using multiple inheritance.
It can lead to the diamond problem where two parent classes have a common method or attribute.
Languages like C++ support multiple inheritance while Java does not.
It can be useful in creating complex class h...

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Q5. Program to Reverse the String?

Ans.

Program to reverse a string

Use a loop to iterate through the characters of the string
Create a new string and append each character in reverse order
Return the reversed string

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Q6. Program to check whether the number is Palindrome or not?

Ans.

Program to check whether the number is Palindrome or not

Convert the number to a string
Reverse the string
Compare the original and reversed string
If they are equal, the number is a palindrome

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Q7. Program to check Prime Number.

Ans.

Program to check if a number is prime or not.

A prime number is a number greater than 1 that has no positive divisors other than 1 and itself.
To check if a number is prime, iterate from 2 to the square root of the number and check if it divides the number evenly.
If any divisor is found, the number is not prime. Otherwise, it is prime.

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Q8. Swap the number without using Third variable.

Ans.

Swapping numbers without using a third variable.

Add the two numbers to be swapped
Assign the sum to the first variable
Subtract the second variable from the sum and assign it to the second variable
Subtract the second variable from the first variable and assign it to the first variable

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Q9. What project have you done in your academics?

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Q10. Why do you want to join TCS?

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Q11. Who is the CEO of TCS?

Ans.

Rajesh Gopinathan is the CEO of TCS.

Rajesh Gopinathan became the CEO of TCS in February 2017.
He joined TCS in 2001 and has held various leadership positions.
Under his leadership, TCS has achieved significant growth and global recognition.
Rajesh Gopinathan has played a key role in driving TCS' digital transformation initiatives.
He has a strong background in finance and has contributed to TCS' financial success.

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Q12. Tell me about yourself?

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Interview Preparation Tips

Interview preparation tips for other job seekers - Interviewer would not be expecting the answer of every question so don't worry if you could not be able to answer any question. You must be confident while answering the question. Read the technicalities wisely which you have mentioned in your resume.

Skills evaluated in this interview

Top TCS iON Assistant System Engineer Trainee Interview Questions and Answers

Q1. What is Encapsulation?

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Assistant System Engineer Trainee Interview Questions asked at other Companies

Q1. #include int main() { int any = ' ' * 10; printf("%d", any); return 0; } What is the output?

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Software Engineer Interview Questions & Answers

Anonymous

posted on 11 Dec 2024

Interview experience

Good

Difficulty level

Moderate

Process Duration

2-4 weeks

Result

Selected

I applied via Walk-in and was interviewed in Nov 2024. There was 1 interview round.

Round 1 - Technical

(3 Questions)

Q1. SQL Array Oop

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Q2. Array defintiion and uses

Ans.

An array is a data structure that stores a collection of elements of the same data type.

Arrays are used to store multiple values in a single variable.
Elements in an array are accessed by their index, starting from 0.
Example: String[] names = {"Alice", "Bob", "Charlie"};

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Q3. Data structures and its uses

Ans.

Data structures are used to organize and store data efficiently in computer memory.

Data structures help in efficient data retrieval, insertion, and deletion operations.
Examples include arrays, linked lists, stacks, queues, trees, and graphs.
Each data structure has its own advantages and use cases based on the requirements of the application.
For example, arrays are used for random access to elements, while linked lists

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Software Engineer Interview Questions asked at other Companies

Q1. Bridge and torch problem : Four people come to a river in the night. There is a narrow bridge, but it can only hold two people at a time. They have one torch and, because it's night, the torch has to be used when crossing the bridge. Person... read more

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TCS iON Interview Questions and Answers for Freshers

Software Development Engineer Interview Questions & Answers

Anonymous

posted on 20 Dec 2024

Interview experience

Average

Difficulty level

Process Duration

Result

Round 1 - Coding Test

(2 Questions)

Q1. Jump game from leetcode

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Q2. Rotation of matrix by 45 degress

Ans.

To rotate a matrix by 45 degrees, transpose the matrix and then reverse the rows.

Transpose the matrix
Reverse the rows of the transposed matrix

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Round 2 - HR

(2 Questions)

Q1. What is encapsulation in oops?

Ans.

Encapsulation is the concept of bundling data and methods that operate on the data into a single unit.

Encapsulation helps in hiding the internal state of an object and restricting access to it.
It allows for data hiding, which prevents direct access to an object's attributes.
Encapsulation also enables the concept of data abstraction, where only relevant details are exposed to the outside world.
By using access modifiers ...

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Q2. How do you configure MySQL database ?

Ans.

MySQL database can be configured using configuration files like my.cnf, command line options, and environment variables.

Use my.cnf file to configure settings like port number, data directory, and buffer sizes
Command line options can be used to override settings from my.cnf file
Environment variables like MYSQL_ROOT_PASSWORD can be used to set passwords during installation

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Interview Preparation Tips

Interview preparation tips for other job seekers - Practice with LeetCode and ensure that everything is reflected on your resume.

Software Development Engineer Interview Questions asked at other Companies

Q1. Given an acyclic graph of a city where each edge represents a road in the city and each vertex represents an crossing. Write an algo to find out the minimum number of vertices at which a policemen will be kept so that all the roads are cove... read more

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Process Associate Interview Questions & Answers

Anonymous

posted on 22 Dec 2024

Interview experience

Good

Difficulty level

Moderate

Process Duration

Less than 2 weeks

Result

Not Selected

I applied via Company Website and was interviewed in Nov 2024. There were 3 interview rounds.

Round 1 - Aptitude Test

Multiple-choice question.

Round 2 - Technical

(2 Questions)

Q1. As per interviewer

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Q2. As per process

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Round 3 - HR

(2 Questions)

Q1. As per company policy

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Q2. Same

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Interview Preparation Tips

Interview preparation tips for other job seekers - Help me find better job opportunities in the life sciences sector.

Process Associate Interview Questions asked at other Companies

Q1. How will you explain a red colour (or any colour) to a person who is blind since his or her birth?

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System Engineer Interview Questions & Answers

Venkata Surya Prasad Madine

posted on 12 Dec 2024

Interview experience

Good

Difficulty level

Process Duration

Result

Round 1 - Coding Test

TCS NQT consists of MCQ and coding

Round 2 - Technical

(2 Questions)

Q1. Internship expereinces

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Q2. I explained my resume

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Round 3 - HR

(2 Questions)

Q1. Is it ok for Reallocation

Ans.

Yes, reallocation is acceptable in certain situations to optimize resources.

Reallocation can be acceptable if it helps optimize resources and improve efficiency.
For example, reallocating server resources to handle increased traffic during peak hours.
Reallocation should be carefully planned and executed to avoid negative impacts on system performance.
Regular monitoring and evaluation of the reallocated resources is impo

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Q2. Yes

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System Engineer Interview Questions asked at other Companies

Q1. Election Winner Determination In an ongoing election between two candidates A and B, there is a queue of voters that includes supporters of A, supporters of B, and neutral voters. Neutral voters have the power to swing the election results ... read more

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Get interview-ready with Top TCS iON Interview Questions

Java Developer Interview Questions & Answers

Anonymous

posted on 21 Dec 2024

Interview experience

Bad

Difficulty level

Easy

Process Duration

Less than 2 weeks

Result

Selected

I applied via Naukri.com and was interviewed in Nov 2024. There were 2 interview rounds.

Round 1 - Aptitude Test

Duration is 1 hr and topic is core java

Round 2 - HR

(2 Questions)

Q1. What i sth OOPS

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Q2. What i s abstract class

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Java Developer Interview Questions asked at other Companies

Q1. Sort 0 and 1 Problem Statement Given an integer array ARR of size N containing only integers 0 and 1, implement a function to sort this array. The solution should scan the array only once without using any additional arrays. Input: The firs... read more

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Software Developer Interview Questions & Answers

sudeep patil

posted on 27 Nov 2024

Interview experience

Excellent

Difficulty level

Process Duration

Result

I applied via Campus Placement

Round 1 - Aptitude Test

Time value distance clock

Round 2 - Technical

(1 Question)

Q1. Points arrays oparetor

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Round 3 - HR

(2 Questions)

Q1. Tell me Your self

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Q2. Why should higher you

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Interview Preparation Tips

Interview preparation tips for other job seekers - Keep learning every time
Don't vest time

Software Developer Interview Questions asked at other Companies

Q1. Maximum Subarray Sum Problem Statement Given an array of integers, determine the maximum possible sum of any contiguous subarray within the array. Example: Input: array = [34, -50, 42, 14, -5, 86] Output: 137 Explanation: The maximum sum is... read more

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C Developer Interview Questions & Answers

Anonymous

posted on 11 Sep 2024

Interview experience

Average

Difficulty level

Process Duration

Result

I applied via Campus Placement

Round 1 - Coding Test

2 questions were asked. Questions were easy - one from graph and one from dp.

Round 2 - Technical

(2 Questions)

Q1. Difference between multi-programming and multi-tasking.

Ans.

Multi-programming involves running multiple programs on a single processor, while multi-tasking involves running multiple tasks within a single program.

Multi-programming allows multiple programs to be loaded into memory and executed concurrently, switching between them to utilize processor time efficiently.
Multi-tasking allows a single program to perform multiple tasks simultaneously, such as running multiple threads o...

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Q2. How to delete the middle element of a linked list?

Ans.

To delete the middle element of a linked list, find the middle element using slow and fast pointers, then remove it by adjusting the pointers.

Use slow and fast pointers to find the middle element
Adjust pointers to skip the middle element and connect the surrounding nodes
Free the memory of the deleted node

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Round 3 - HR

(2 Questions)

Q1. Are you willing to relocate?

Ans.

Yes, I am open to relocating for the right opportunity.

I am open to relocating for the right job opportunity.
I am willing to move to a new location if required for the job.
I am flexible and willing to relocate for the right position.

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Q2. Why do you want to join TCS?

Ans.

I want to join TCS because of its reputation for providing challenging projects and opportunities for growth.

TCS is known for its innovative projects in various industries.
I am impressed by TCS's commitment to employee development.
I believe TCS will provide me with a platform to enhance my skills and knowledge.

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Skills evaluated in this interview

C Developer Interview Questions asked at other Companies

Q1. String Transformation Problem Given a string (STR) of length N, you are tasked to create a new string through the following method: Select the smallest character from the first K characters of STR, remove it from STR, and append it to the n... read more

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Sdet Engineer Interview Questions & Answers

ANKIT PASWAN

posted on 8 Oct 2024

Interview experience

Excellent

Difficulty level

Moderate

Process Duration

2-4 weeks

Result

Not Selected

I applied via Campus Placement and was interviewed in Sep 2024. There were 3 interview rounds.

Round 1 - Aptitude Test

It is very easy round

Round 2 - Coding Test

One easy and one medium

Round 3 - Technical

(2 Questions)

Q1. Four pillers of oops

Ans.

Encapsulation, Inheritance, Polymorphism, Abstraction

Encapsulation: Bundling data and methods that operate on the data into a single unit. Example: Class in Java
Inheritance: Ability of a class to inherit properties and behavior from another class. Example: Subclass extending a superclass
Polymorphism: Ability to present the same interface for different data types. Example: Method overloading in Java
Abstraction: Hiding t...

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Q2. What is sql and database

Ans.

SQL is a programming language used to manage and manipulate data in relational databases.

SQL stands for Structured Query Language
It is used to communicate with databases to perform tasks like querying, updating, and deleting data
Common SQL commands include SELECT, INSERT, UPDATE, DELETE
Examples of popular databases that use SQL include MySQL, PostgreSQL, Oracle

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Skills evaluated in this interview

Sdet Engineer Interview Questions asked at other Companies

Q1. Tell me about the projects and knowledge on selenium api and etc?

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Senior Modeller Interview Questions & Answers

Irene Diana

posted on 16 Aug 2024

Interview experience

Excellent

Difficulty level

Process Duration

Result

Round 1 - Technical

(4 Questions)

Q1. SQL window function

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Q2. About joins and explain

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Q3. Performance optimization

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Q4. Normalisation and denormalization

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Round 2 - HR

(2 Questions)

Q1. Why you need job change

Ans.

Seeking new challenges and growth opportunities in a more senior role.

Looking for career advancement
Seeking new challenges and projects
Interested in expanding skill set and knowledge
Want to take on more responsibilities and leadership roles

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Q2. Why tcs after a long gap

Ans.

TCS offers a challenging work environment and opportunities for growth after a long gap.

TCS is known for its diverse projects and cutting-edge technologies, providing a stimulating work environment.
After a long gap, I am eager to re-enter the workforce and TCS offers a platform for me to showcase my skills and expertise.
TCS has a strong reputation in the industry and I believe working here will help me enhance my caree

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Senior Modeller Interview Questions asked at other Companies

Q1. How do you make different systems to talk to each other? what are the considerations to design a data product? challenges and scenario based

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System Engineer 3 Interview Questions & Answers

mohit paryani

posted on 16 Dec 2024

Interview experience

Good

Difficulty level

Moderate

Process Duration

Result

Round 1 - Aptitude Test

Basic aptitude questions

Round 2 - Technical

(1 Question)

Q1. Questions related to logic gates

Add your answer

Round 3 - HR

(1 Question)

Q1. Questions related to puzzles to judge your reasoning abilities

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System Engineer 3 Interview Questions asked at other Companies

Q1. What is Object Oriented Programming? What is difference between drop and delete? (DBMS question)

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Salary Discussions, Hike & Promotions

I have got an offer of 34 LPA from TCS and Capgemini . I have 11 years of experience , Azure Developer. Can you please guide / suggest which company should I join . I am confused since both are offering the s... read more

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TCS iON Interview FAQs

How many rounds are there in TCS iON interview?

TCS iON interview process usually has 2-3 rounds. The most common rounds in the TCS iON interview process are Aptitude Test, Technical and HR.

What are the top questions asked in TCS iON interview?

Some of the top questions asked at the TCS iON interview -

What are the technologies you k...read more
Manage projects with Repositories Clone a project to work on a local copy Contr...read more
What programming language you k...read more

How long is the TCS iON interview process?

The duration of TCS iON interview process can vary, but typically it takes about less than 2 weeks to complete.

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