Quest Technologies Associate Software Engineer Interview Questions and Answers

Round duration - 90 minutes
Round difficulty - Medium

It was video call round in teams which went for around 90 minutes. Interviewer is flexible and it went well.

Q1. 
Search in a 2D Matrix
Given a 2D matrix MAT of size M x N, where M and N represent the number of rows and columns respectively. Each row is sorted in non-decreasing order, and the first element of each ro...read more
Ans. 
Implement a function to search for a given integer in a 2D matrix with specific properties.
• Iterate through each row of the matrix and perform a binary search on each row to find the target integer.

• Since the rows are sorted, binary search can be applied efficiently to determine if the target exists in the matrix.

• Handle edge cases such as empty matrix or invalid input values.

• Return 'TRUE' if the target is found in the ma
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Q2. 
Find First Unique Character in a String
You are given a string S of length N. Your task is to find the index (considering 1-based indexing) of the first unique character in the string. If there are no uni...read more
Ans. 
Find the index of the first unique character in a given string, return -1 if no unique characters are found.
• Iterate through the string to count the frequency of each character

• Iterate through the string again to find the first character with frequency 1

• Return the index of the first unique character or -1 if none found
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Round duration - 30 minutes
Round difficulty - Easy

Interview went arounf 30minutes at 10AM. As it was hr round there wont be any technical stuff and I have only concentrated on my communication skills and had a glance of frequently asked hr questions before interview. It was more of a discussion.