Reliance Retail Full Stack Developer Interview Questions and Answers

Just discuss about java concept and exprience

Q1. Explain about last project and how to handle it.
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Round duration - 60 Minutes
Round difficulty - Medium

Explain Higher Order Functions in javascript.
What is the difference between tag and tag?

Q1. 
Sort Array of Strings Problem Statement
Given an array of strings ARRSTR[] of size N, and a character C, your task is to sort the ARRSTR[] array according to a new alphabetical order that starts with the ...read more
Ans. HashMap Approach
Approach: The idea here is to use a data structure HashMap to store each character’s order in the new alphabetical order, starting with a letter c (given in the problem). Now, start comparing the strings in the ‘ARRSTR[]’ using HashMap that has been created to define the order.
 
Suppose that we are comparing two strings of ‘ARRSTR[]’ named ‘X’ and ‘Y’. Let us assume that we have found the first diff...read more
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Round duration - 60 minutes
Round difficulty - Medium

List the different types of relationships in SQL.
What is an Alias in SQL?

Q1. 
Relative Sorting Problem Statement
You are given two arrays, 'ARR' of size 'N' and 'BRR' of size 'M'. Your task is to sort the elements of 'ARR' such that their relative order matches that in 'BRR'. Any e...read more
Ans. Brute Force
1. The idea is to maintain a visited array of size N.
2. Now, look for all occurrences of BRR elements one by one in ARR and mark them as visited and add them in ans array.
3. After performing the above operation. Insert all unvisited elements of ARR into a set, if any. So that they get arranged in a sorted manner.
4. And then finally insert elements of the set into our RES array.
Space Complexity: O(n)Explanation:
O(N), wh...read more
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Round duration - 60 Minutes
Round difficulty - Easy

Q1. 
Excel Sheet Column Number Problem Statement
You are provided with a string STR representing a column title in an Excel Sheet. Your task is to determine the corresponding column number.
Example:
A typica...read more
Ans. Optimal Solution
• The solution to this problem is like base 26 number conversion. Why 26? Because the number of capital english alphabets is 26.
• For example, while converting binary to decimal, we take base as 2 and then convert it to base 10. We would be doing the same thing here as well.
• To find the conversion, we would traverse through the given string from left to right, while calculating the answer.
• For every character...read more
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Round duration - 60 Minutes
Round difficulty - Easy

Q1. Why do you want to join Lowe's?
Ans. 
Tip 1 : Polite
Tip 2 : Truth
Tip 3 : Simple
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2 coding questions and a few MCQs

Q1. Asked to explain and optimise my solution from coding test
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Q1. Behavioral round. Asked about resume.
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Q1. General HR round and trying to find if you're a right fit for the company
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Mettl test , scored 90% still didn't get shortlist for tech round

Q1. Web services spring react
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Q2. Java code string
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Q1. Laravel based questions
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Q1. Basic questions
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Q1. System design white board question
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Q1. Strategy design pattern, exception handling
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Q1. Behavioral interview questions
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Leetcode 3234 question

Q1. Java question about oops concept
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Q2. Dsa problem k connected airports
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Q1. Why u want to join walmart
Ans. 
I want to join Walmart because of its reputation as a leading retail company with a strong focus on technology and innovation.
• Opportunity to work on cutting-edge technology projects

• Chance to contribute to a well-known and respected company

• Desire to be part of a team that values innovation and growth
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2 DSA questions and some MCQ on Java and Spring

Q1. Longest palindromic substring
Ans. 
A palindromic substring is a string that reads the same forwards and backwards.
• Use dynamic programming to find the longest palindromic substring.

• Start by considering each character as the center of a potential palindrome.

• Expand outwards from each center to check for palindromes of odd and even lengths.
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Q2. Remove duplicates in place from a 1D array
Ans. 
Remove duplicates from a 1D array of strings in place
• Iterate through the array and use a HashSet to keep track of unique elements

• Replace duplicates with null or an empty string to remove them in place
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Q1. Project discussion
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Q2. Search min element in a rotated sorted array with duplicate elements
Ans. 
Search for the minimum element in a rotated sorted array with duplicate elements.
• Use binary search to find the minimum element in the rotated sorted array.

• Handle the case where duplicate elements are present by adjusting the search conditions.

• Consider cases where the array is not rotated or contains only one element.
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Q3. Ways of declaring singleton class
Ans. 
A singleton class is a class that can only have one instance created throughout the application.
• Declare a private static instance variable of the class

• Create a private constructor to prevent external instantiation

• Provide a public static method to access the instance
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Q1. Project discussion
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Q2. Behavioural questions
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The test was quite simple but the interviewer was not ready to accept the solution. Even with complete dry run and working output he denied the solution giving a very vague reason.

Q1. In this design round , they asked me to demonstrate how to build cowin app. Gave a complete overview including HLD and LLD for each showcased feature still got negative response.
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