TCS Software Developer Interview Questions, Process, and Tips

Round duration - 120 Minutes
Round difficulty - Medium

A MCQ + CODING TEST WITH FOUR SECTION

Q1. 
Valid Parentheses Problem Statement
Given a string 'STR' consisting solely of the characters “{”, “}”, “(”, “)”, “[” and “]”, determine if the parentheses are balanced.
Input:
The first line contains an...read more
Ans. 
Check if given strings containing parentheses are balanced or not.
• Use a stack to keep track of opening parentheses

• Iterate through the string and push opening parentheses onto the stack

• When a closing parenthesis is encountered, pop from the stack and check if it matches the corresponding opening parenthesis

• If stack is empty at the end and all parentheses are matched, the string is balanced
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Q2. 
Number Pattern Problem Statement
Create a number pattern as specified by Ninja. The pattern should be constructed based on a given integer value 'N'.
Example:
Input:
N = 4
Output:
4444 3444 2344 1234
...read more
Ans. 
Generate a number pattern based on a given integer value 'N' by incrementing digits from right to left in each line.
• Start from the rightmost side and increment digits while moving towards the left in each line

• Print 'N' lines for each test case

• Handle multiple test cases by reading the number of test cases 'T' first
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Round duration - 25 Minutes
Round difficulty - Medium

THERE ARE THREE PANELIST OVER A ZOOM CALL HR,A TR AND A MR IT WAS IN THE MORNING I WAS GETTING READY FOR THE INTERVIEW BUT I RECIVED A CALL FORM HR ASKING ME TO JOIN IMMEDIATELY FOR SOME REASON I STILL HAVE LIKE AN HOUR BUT I JUST GET READY AND INTERVIEW STARTED

Coding test would be there for freshers, so be prepare for that

Q1. Tell me about your self
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Q2. Tell me about Your strengths
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Round duration - 180 minutes
Round difficulty - Medium

written test has 5 sections: 

Quantitative- 26 questions - 40 minutes
Logical- 30 questions - 50 minutes
Verbal- 24 questions - 30 minutes
Programming MCQ- 10 questions -15 minutes
Coding test- 2 questions - 45 minutes

The exam was in TCSion portal and it was in the morning. The assessment environment was good except for the coding compiler.

Q1. 
Reverse the String Problem Statement
You are given a string STR which contains alphabets, numbers, and special characters. Your task is to reverse the string.
Example:
Input:
STR = "abcde"
Output:
"e...read more
Ans. 
Reverse a given string containing alphabets, numbers, and special characters.
• Iterate through the string from the end to the beginning and append each character to a new string.

• Use built-in functions like reverse() or StringBuilder in languages like Python or Java for efficient reversal.

• Handle edge cases like empty string or strings with only one character.

• Ensure to consider the constraints provided in the problem state
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Q2. 
Make Palindrome Problem Statement
You are provided with a string STR of length N comprising lowercase English alphabet letters. Your task is to determine and return the minimum number of characters that n...read more
Ans. 
The task is to find the minimum number of characters needed to make a given string a palindrome.
• Iterate from both ends of the string and compare characters to find the number of characters needed to make it a palindrome.

• Use dynamic programming to optimize the solution by storing previously calculated results.

• Handle edge cases like an already palindrome string or an empty string.

• Consider using recursion or iteration to ...read more
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Round duration - 90 minutes
Round difficulty - Medium

CodeVita: CodeVita is an online coding contest that is conducted by TCS every year across the whole world for coders to showcase their programming skills. There are three rounds in CodeVita:

Pre Qualifier: Conducted Online
Qualifier: Conducted Online
Grand Finale: Conducted in India (offline) in TCS centers
In the Pre Qualifier round, there are 6 questions, and if you are able to solve at least 1 question and clear it’s all the test cases, there is a chance that you will get an interview call from TCS. For the safe side try to solve 2 questions or more completely.

Q1. 
Delete Alternate Nodes from a Singly Linked List
Given a Singly Linked List of integers, remove all the alternate nodes from the list.
Input:
The first and the only line of input will contain the elemen...read more
Ans. 
Remove alternate nodes from a singly linked list of integers.
• Traverse the linked list and skip every alternate node while connecting the previous node to the next node.

• Update the next pointers accordingly to remove the alternate nodes.

• Ensure to handle edge cases like empty list or list with only one node.
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Q2. 
Find All Pairs Adding Up to Target
Given an array of integers ARR of length N and an integer Target, your task is to return all pairs of elements such that they add up to the Target.
Input:
The first line ...read more
Ans. 
Given an array of integers and a target, find all pairs of elements that add up to the target.
• Iterate through the array and for each element, check if the target minus the element exists in a hash set.

• If it exists, add the pair to the result. If not, add the element to the hash set.

• Handle cases where the same element is used twice in a pair.

• Return (-1, -1) if no pair is found.
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Round duration - 60 minutes
Round difficulty - Easy

We were informed by the TCS a day before the interview about the time of our interview and all. As this year the whole process was online so a bunch of instructions was mentioned by TCS like the internet connectivity, important documents to present, and all. I joined the virtual lobby on time and my slot was from 3:30 PM to 6:30 PM, there were a few more candidates in the virtual lobby, and a lady started to speak. I was the first to give the interview and all other candidates were given different slots by that lady for their interviews.

Q1. Can you tell me something about yourself and describe the approaches you used to solve the problems in the contest?
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Round duration - 90 minutes
Round difficulty - Easy

This interview directly started with questions.

 

Q1. How has the COVID-19 pandemic affected the IT industry?
Ans. 
The COVID-19 pandemic has significantly impacted the IT industry, leading to remote work, increased demand for digital solutions, and delays in projects.
• Transition to remote work for many IT companies

• Increased demand for digital solutions such as online collaboration tools, e-commerce platforms, and telehealth services

• Delays in projects due to disruptions in supply chains and workforce availability

• Shift towards cloud c...read more
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Q2. What is the contribution of the TATA group towards the betterment of our nation?
Ans. 
TATA group has made significant contributions to the nation through various industries and philanthropic initiatives.
• TATA Steel is one of the largest steel producers in India, contributing to infrastructure development.

• TATA Motors is a leading automobile manufacturer, driving innovation in the automotive sector.

• TATA Consultancy Services (TCS) is a global IT services company, creating job opportunities and boosting the ...read more
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Round duration - 90 minutes
Round difficulty - Easy

First, she introduced herself and then asked me to give my introduction. Then she asked behavorial and general questions.