Codalien Technologies Software Engineer Interview Questions, Process, and Tips

Shared a written coding test.

Q1. First round to ask things from resume and basic questions on Java and database.
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Q1. Logical problems solving round.
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Q2. Build an authentication system for bank.
Ans. 
An authentication system for a bank should have multiple layers of security to protect sensitive information.
• Use multi-factor authentication (MFA) to verify user identity

• Implement encryption to protect data in transit and at rest

• Use secure protocols such as HTTPS and TLS

• Implement access controls to limit user permissions

• Regularly update and patch the system to address vulnerabilities
Answered by AI
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Round duration - 20 minutes
Round difficulty - Easy

Around 8 pm I got the call from Interviewer. The interview was friendly, Only one problem was asked then general discussion.

Q1. How would you swap two numbers without using a third variable?
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Round duration - 90 minutes
Round difficulty - Hard

It was given the flexibility of 1 day to take as per our convenience. The Environment of Coderbyte was good. Ten MCQs and five coding questions were asked.

Q1. 
Reverse the String Problem Statement
You are given a string STR which contains alphabets, numbers, and special characters. Your task is to reverse the string.
Example:
Input:
STR = "abcde"
Output:
"e...read more
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Q2. 
Anagram Substring Search
Given two strings 'STR' and 'PTR', identify all starting indices of 'PTR' anagram substrings in 'STR'. Two strings are anagrams if one can be rearranged to form the other.
Input:
...read more
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Q3. 
Expression Equality Checker
Given two strings representing expressions in variables, determine if they are equivalent. Return 'YES' if the expressions are identical and 'NO' if they are different. Each ex...read more
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Q4. 
Construct Complete Binary Tree Problem Statement
Given an array or list 'ARR' containing values for 'N' nodes of a binary tree, your task is to construct a complete binary tree in a level order fashion. T...read more
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Q5. 
Shortest Substring with All Characters
Determine the shortest substring of the string S that includes every character from S at least once. If multiple shortest substrings exist, return the one that start...read more
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Round duration - 60 minuted
Round difficulty - Medium

Afternoon at 2 pm, The interviewer was friendly. Two questions and then general discussion.

Q1. What is the event loop and event queue in system design?
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