TCS Software Developer Interview Questions, Process, and Tips

Round duration - 50 minutes
Round difficulty - Medium

A flexible window of 6 hours was provided to attempt the 1 hour test

Q1. 
Maximum Vehicle Registrations Problem
Bob, the mayor of a state, seeks to determine the maximum number of vehicles that can be uniquely registered. Each vehicle's registration number is structured as foll...read more
Ans. Permutation and Combinations
1. We can make use of basic Permutation and combination, to find out how many distinct vehicle registration numbers are possible.
2. Consider that we have 4 locations to fill with some digits and each location can acquire some digit from 0 to 9. Then the total possible ways to fill all locations in unique ways will be 10 X 10 X 10 X 10, as each location can acquire 10 different types of digits. In ...read more
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Q2. 
Palindromic Numbers Finder
Given an integer 'N', your task is to identify all palindromic numbers from 1 to 'N'. These are numbers that read the same way forwards and backwards.
Input:
The first line pr...read more
Ans. Brute Force
In this approach, iterate through the integers 1 to N, then check for each integer if it is a palindrome or not.
To check if an integer is a palindrome, convert the integer into a string and check if it is equal to the reverse.
We define a function isPalindrome(num), where we check if num is palindrome or not and return the result accordingly.
 
Algorithm:
• The function isPalindrome(num).
  • Convert the number nu...read more
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Round duration - 60 minutes
Round difficulty - Easy

The interviewer was chill and quite polite.

Q1. Write a SQL query to output the data of students whose names start with the letter 'A'.
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Q2. Can you define an Operating System and explain what a process table is?
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Q3. 
Find Duplicates in an Array
Given an array ARR of size 'N', where each integer is in the range from 0 to N - 1, identify all elements that appear more than once.
Return the duplicate elements in any orde...read more
Ans. 
1. Input an ArrayList from the user
2. Traverse and store the occurence in hashmap 
3. Remove the elements with more than one frequency
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Round duration - 20 minutes
Round difficulty - Easy

Standard HR round with some behavioural questions

It was good and easy.

It was a little challenging.

Q1. Your name in college premises
Ans. 
My name in college premises was well-known due to my active participation in coding competitions and hackathons.
• Participated in multiple coding competitions and hackathons

• Won prizes in several events

• Organized coding events and workshops

• Collaborated with other students on coding projects

• Helped juniors with coding and programming skills
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Q2. Doom going to doom around
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Q1. Reverse a string in python OOPS concepts
Ans. 
Reverse a string in python
• Use the slicing technique to reverse a string in python

• The syntax for slicing is string[start:end:step]

• To reverse a string, set the start and end as empty and step as -1

• Example: 'hello'[::-1] will return 'olleh'
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Q2. Data types & features of it. Importing files
Ans. 
Data types are the classification or categorization of data items.
• Data types define the type of data that can be stored and manipulated in a programming language.

• Common data types include integers, floating-point numbers, strings, booleans, and arrays.

• Each data type has its own set of features and operations that can be performed on it.

• Importing files involves reading data from external files into a program for process
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Q1. If you were given a role of problem solver , critical thinker, supervisor what would you choose.
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