Tredence Software Engineer Interview Questions, Process, and Tips

Round duration - 90 Minutes
Round difficulty - Medium

The round was scheduled in afternoon time.
HackerEarth test link was shared beforehand
All the instructions were provided in the welcome page of test link.
It was proctored test

Q1. Check If The String Is A Palindrome
You are given a string 'S'. Your task is to check whether the string is palindrome or not. For checking palindrome, consider alphabets and numbers only and ignor...read more
Ans. 
Step1 : I started loop from 1st element to length/2 of array and checked first character is equal to last character and second character to the 2nd last so on
Step 2 : if any character mismatches return false
Step 3 : if every character matches and loop has run fully then in last return True.
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Q2. First Repeated Character
You are given a string 'STR' of lowercase English alphabets. You need to find the repeated character present first in the string.
Example:
If the string is: “abccba”, the...read more
Ans. 
Step1 : I looped though the string for each character and searched for the same in rest of the string.
Step 2 : It used nested loops.
Step 3 : when we find repeated character save index of it and return it after breaking from loop.
I didn't used best approach as time was limited.
Answered by CodingNinjas
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Round duration - 35 minutes
Round difficulty - Medium

It was in afternoon 3pm.
Interview platform was Microsoft teams.
Interview link was shared a day before.
Interviewer was professional.

Q1. Pair Sum
You are given an integer array 'ARR' of size 'N' and an integer 'S'. Your task is to return the list of all pairs of elements such that each sum of elements of each pair eq...read more
Ans. 
Step 1 : First take an empty hash table H
Step 2 : Do following for each element Arr[i] in Arr[] 
1.) If H[y – A[i]] is set then print the pair (Arr[i], x – Arr[i])
2.) Add that Arr[i] into hash table H.
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Q2. Project based Question
I was asked thoroughly about my Resume mentioned Data analysis project.
What is the real world issue in Data cleaning for sentiment analysis.
Basic questions about Python data analysis ...read more
Ans. 
Tip 1 : Mention only the projects which you know fully.
Tip 2 : Try to provide O(N) solutions only after discussing Naive approach.
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Q3. DBMS Question
SQL query to find the first names in ending with n.
Select names of city in database which ends with n.
Ans. 
Tip 1 : Go through basic SQL queries
Tip 2 : Be good in DBMS basics.
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Round duration - 25 Minutes
Round difficulty - Medium

It was held around 4pm.
Scheduled on MS teams.
Interview link shared one day before.
The interviewer was pretty chill and made me comfortable.

Q1. Basic HR question
I was asked regarding situation where a company approaches me in pandemic time and asks that demand is high but supply is low how to handle this situation
Ans. 
Tip 1 : I told first we should remove middle man which can stock supplies as well as figure out which place has more demand so that we can focus on our loyal customers first.
Tip 2 : Next we should launch an emergency helpline if someone urgently needs the product for emergency use.
Tip 3 : We have to maybe outsource some of the parts of the product to make production faster.
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Q2. Puzzle
How many cars in your city. Guestimate.
Ans. 
Tip 1 : Took Approx population of city and divided the number by 5 for number of families in city
Tip 2 : Further divided those families according to economic scale.
Tip 3 : Provided upper middle class family percentage with 1 car per family and rich family percentage in city which is pretty less with 2.5 cars per family which also covers the upper limit and lower cases of some lower middle class families which have cars
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Q3. Basic HR Question
Why to join this company?
Ans. 
Tip 1 : Go through the company and its history
Tip 2 : be ready with your ambition that why do you want to join.
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Round duration - 90 minutes
Round difficulty - Easy

Q1. Reverse Linked List
Given a singly linked list of integers. Your task is to return the head of the reversed linked list.
For example:
The given linked list is 1 -> 2 -> 3 -> 4-> NULL. Then th...read more
Ans. Brute Force
The brute force approach is to use recursion. First, we reach the end of the Linked List recursively and at last node, we return the last node, which becomes the new head of the partially reversed Linked List. While coming back from each recursion call we add the current node in the current recursion call to the last node of the partially reversed Linked List and assign the current node to null.
 
Steps:
&...read more
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Round duration - 60 minutes
Round difficulty - Easy

Q1. Node JS based Question
Had to make a connection to a DB via NodeJS. Then take input from a form and feed it into a database.
Ans. 
Created a connection in Node.
Created a form in HTML
Fetched the data and fed it to the API
Did some processing and sent it to the database
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Q2. Puzzle
4 litre water puzzle
Ans. 
Tip 1 : Understand the problem in detail
Tip 2 : Discuss possible cases
Tip 3 : Communicate your thoughts clearly on your approach
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Round duration - 40 minutes
Round difficulty - Easy

Q1. Web Development Question
Gave CSS code and asked me to debug it to make the functionality work
Ans. 
I understood the result expectation first
I analyzed the given code
There was an issue in the parent and child selection, so I fixed that.
The interviewer tried to confuse me by asking few variations.
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Round duration - 60 minutes
Round difficulty - Easy

Technical Interview round with questions on CSS and Jquery mainly.

Q1. CSS Question
What is CSS box model?
Ans. 
The CSS box model is a container that contains multiple properties including borders, margin, padding, and the content itself. It is used to create the design and layout of web pages. It can be used as a toolkit for customizing the layout of different elements. The web browser renders every element as a rectangular box according to the CSS box model. Box-Model has multiple properties in CSS.
Explanation of the different...read more
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Q2. JQuery Question
Select all div using Jquery.
Ans. 
$(function() 
{
	console.log($('div')); 
	// [], []

	$('div').each(function(i, ele) {
		console.log(i + ': ' + ele); 
		// 0: 
		// 1: 
	});
});​
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Q3. JavaScript Question
Change the background color of all items
Ans. 
var x = document.querySelectorAll("li");
 
for (let i = 0; i < x.length; i++) {
	x[i].style.backgroundColor = "red";
}
li 
{
	color: white;
	text-align: center;
	border: 1px solid white;
	font-weight: 900;
}
 
Aman
Rohan
Naman
 
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Q4. JavaScript Question
What will be the output of the following code snippet?
var arr=[1,2,3,4,5] 
arr.push(6)
arr.unshift(1) 
arr.pop() 
arr.shift()
Ans. 
[ 1, 2, 3, 4, 5 ]
Explanation :
1. arr.push(6) => [ 1, 2, 3, 4, 5, 6 ]
2. arr.unshift(1) =>[1, 1, 2, 3, 4, 5, 6]
3. arr.pop() => [ 1, 1, 2, 3, 4, 5 ]
4. arr.shift() => [ 1, 2, 3, 4, 5 ]
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Round duration - 60 minutes
Round difficulty - Easy

Technical Interview round with questions on Java mainly.

Q1. Java Question
Uses of Final Keyword in Java
Ans. 
The final keyword in java is used to restrict the user. The java final keyword can be used in many context. Final can be :
variable
method
class

The final keyword can be applied with the variables, a final variable that have no value it is called blank final variable or uninitialized final variable. It can be initialized in the constructor only. The blank final variable can be static also which will be initialized in the s...read more
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Q2. Java Question
What is Front Controller in Spring MVC?
Ans. 
In Spring Web MVC, the DispatcherServlet class works as the front controller. It is responsible to manage the flow of the Spring MVC application.
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Q3. Java Question
Write the annotation for request mapping?
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Q4. Java Question
Write the annotation for controller?
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Q5. Java Question
Output of the following code snippet :
public static int floating(int x){ 
	return x*floating(x-1); 
} 
public static void main(String[] args){
	floating(10);
}
Ans. 
Will result in Stack Overflow Error.
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Round duration - 30 minutes
Round difficulty - Easy

This was a typical HR round.

Q1. Basic HR Questions
1. If your teamleader is taking credit for all the hardwork you're doing, what will you do?
2. Why Tredence?
3. Why should we hire you?
Ans. 
Tip 1 : The cross questioning can go intense some time, think before you speak.

Tip 2 : Be open minded and answer whatever you are thinking, in these rounds I feel it is important to have opinion.

Tip 3 : Context of questions can be switched, pay attention to the details. It is okay to ask questions in these round, like what are the projects currently the company is investing, which team you are mentoring. How all is the
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