Ecolab Digital Center Software Developer Interview Questions and Answers

Q1. Tell me about yourself
Add your answer
Q2. What is the difference between HTTp and HTTPS
Ans. 
HTTP is unsecured protocol while HTTPS is secured protocol using SSL/TLS encryption.
• HTTP stands for Hypertext Transfer Protocol, while HTTPS stands for Hypertext Transfer Protocol Secure.

• HTTPS uses SSL/TLS encryption to secure the communication between the client and server, while HTTP does not.

• HTTPS uses port 443 by default, while HTTP uses port 80.

• HTTPS URLs begin with 'https://' and are secured with a padlock icon i...read more
Answered by AI
Add your answer

It was straightforward

Q1. Was easy explaining about role
Add your answer
Q2. Previous experience. How to handle the role and expectation. Work schedule. Explain about the team
Ans. 
The candidate should discuss their previous experience, how they handle their role and expectations, their work schedule, and provide an explanation about their previous team.
• Discuss previous experience in software engineering roles

• Explain how you handled your role and met expectations in previous positions

• Describe your typical work schedule and any flexibility you have

• Provide an overview of your previous team, their s
Answered by AI
Add your answer

First round of aptitude test. They gave 40 question in 1 hr. Question based on general quantitative aptitude.

There were total 8 questions in 2 hrs. 5 questions on Data structures algorithm and 3 questions on DBMS

Round duration - 60 Minutes
Round difficulty - Medium

Q1. 
Palindrome String Validation
Determine if a given string 'S' is a palindrome, considering only alphanumeric characters and ignoring spaces and symbols.
Note:
The string 'S' should be evaluated in a case...read more
Ans. 
The task is to check whether a given string is a palindrome or not, considering only alphabets and numbers and ignoring symbols and whitespaces.
• Convert the string to lowercase and remove all symbols and whitespaces.

• Reverse the modified string and compare it with the original string.

• If they are equal, then the string is a palindrome.

• If not, then the string is not a palindrome.
Answered by AI
Add your answer
Q2. 
Square Root (Integral) Problem Statement
Given a number N, calculate its square root and output the integer part only.
Example:
Input:
18
Output:
4
Explanation:
The square root of 18 is approximate...read more
Ans. 
The task is to find the integral part of the square root of a given number.
• Use the built-in square root function to find the square root of the number.

• Convert the result to an integer by rounding down or using the floor function.

• Print the integer part of the square root as the output.
Answered by AI
Add your answer
Q3. 
Min Steps to One Using Dynamic Programming
Given a positive integer N, your task is to determine the minimum number of steps required to reduce N to 1.
Allowed Operations:
1) Subtract 1 from it: n = n -...read more
Ans. 
The task is to find the minimum number of steps required to reduce a positive integer to 1 using three given operations.
• Use dynamic programming to solve the problem efficiently.

• Create an array to store the minimum steps required for each number from 1 to N.

• Iterate from 2 to N and calculate the minimum steps for each number based on the three operations.

• Return the minimum steps for N.
Answered by AI
Add your answer

Round duration - 60 Minutes
Round difficulty - Medium

They started Fundamentals of OOP- Inheritance, Polymorphism

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]
Out...read more
Ans. 
The maximum sum of any contiguous subarray in an array is found using Kadane's algorithm in O(N) time.
• Initialize two variables, maxSum and currentSum, both set to the first element of the array.

• Iterate through the array from the second element.

• For each element, update currentSum by adding the element to it.

• If currentSum becomes negative, reset it to 0.

• If currentSum is greater than maxSum, update maxSum.

• After iterating ...read more
Answered by AI
Add your answer

Round duration - 30 Minutes
Round difficulty - Medium

Some people had two HR interviews but I only had one and interview went up till 11:30 pm and you get only 5-10 minutes to prepare for HR on Zoom