TCS Interview Questions, Process, and Tips

A person's ability to carry on a specific subject considered as aptitude

Group discussion used to clarification if required before hand

Q1. What is used to technical round
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Q2. Explain the technical
Ans. 
Technical explanation of what?
• Please provide more context or specify the topic

• Without more information, it's difficult to give a meaningful answer
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Q1. HR round used in software
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Q2. Explain the your talent skills and benifits our company
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Quite basic interview

Easy to code, repeated questions from previous years

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. 
Calculate the maximum number of unique vehicle registrations based on given constraints.
• Parse input for number of test cases, district count, letter ranges, and digit ranges.

• Calculate the total number of unique registrations based on the given constraints.

• Output the maximum number of unique vehicle registrations for each test case.
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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. 
Implement a function to find all palindromic numbers from 1 to N.
• Iterate from 1 to N and check if each number is a palindrome

• Use string manipulation to check for palindromes

• Consider edge cases like single-digit numbers and 11
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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'.
Ans. 
SQL query to output data of students whose names start with 'A'.
• Use SELECT statement to retrieve data from the table.

• Use WHERE clause with LIKE operator to filter names starting with 'A'.

• Example: SELECT * FROM students WHERE name LIKE 'A%';
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Q2. Can you define an Operating System and explain what a process table is?
Ans. 
An operating system is a software that manages computer hardware and provides services for computer programs.
• An operating system is the most important software that runs on a computer.

• It manages the computer hardware and provides common services for computer programs.

• Examples of operating systems include Windows, macOS, Linux, and Unix.

• A process table is a data structure used by the operating system to manage informati...read more
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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. 
Find duplicates in an array of integers within a specified range.
• Iterate through the array and keep track of the count of each element using a hashmap.

• Return elements with count greater than 1 as duplicates.

• Time complexity can be optimized to O(N) using a set to store duplicates.

• Example: For input [0, 3, 1, 2, 3], output should be [3].
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Round duration - 20 minutes
Round difficulty - Easy

Standard HR round with some behavioural questions

Programing component

Q1. What is the difference between method and block.
Ans. 
Method is a named block of code that can be called multiple times, while a block is a group of statements enclosed in curly braces.
• A method has a name and can accept parameters, while a block does not.

• A method can return a value, while a block cannot.

• A method can be called from anywhere in the program, while a block is only accessible within the scope it was defined.

• Example of a method: public int add(int a, int b) { r...read more
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Q2. What is variable and types of variable.
Ans. 
A variable is a container that holds a value. There are different types of variables in programming.
• Variables are used to store data in a program

• They can be assigned different values during runtime

• Types of variables include integers, floats, strings, booleans, and more

• Variables can be declared with a specific data type or left untyped

• Examples: int age = 25, float price = 9.99, string name = 'John Doe'
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Programing component

What is the meaning of static block

Who to convert Int to string by use parse method