Kellton Software Developer Interview Questions and Answers

It was an assignment given to us. basic coding questions

Q1. Basic coding questions
Add your answer

Round duration - 30 minutes
Round difficulty - Easy

We get 30 question for 30 minutes. All question had multiple choice. One question was to count the ways to reach the nth stairs mathematically. It was in the form of mcq.

Q1. 
Count Ways to Climb Stairs Problem
Given a staircase with a certain number of steps, you start at the 0th step, and your goal is to reach the Nth step. At every step, you have the option to move either on...read more
Ans. 
The problem involves counting the number of distinct ways to climb a staircase with a certain number of steps by moving either one or two steps at a time.
• Use dynamic programming to solve this problem efficiently.

• Define a recursive function to calculate the number of ways to reach each step.

• Consider base cases for 0 and 1 steps.

• Use memoization to store and reuse intermediate results.

• Return the final result modulo 10^9+7
Answered by AI
Add your answer

Round duration - 5 minutes
Round difficulty - Medium

It was evening when my chance came. I went to HR cabin in proper discipline manner. I great him and then he ask to sit. Then I gave him my resume. He start asking basic details which are not mentioned in resume. Then He gave me one question from array (To print 3rd highest value from array without using sorting method). Then asked questions from database and Oops. After I gave answers he asked me do you like coding or want to do this for money. So I tell him I like coding so its my passion. Then He asked me to leave.

Q1. 
Kth Largest Element Problem
Given an array containing N distinct positive integers and a number K, determine the Kth largest element in the array.
Example:
Input:
N = 6, K = 3, array = [2, 1, 5, 6, 3, ...read more
Ans. 
Find the Kth largest element in an array of distinct positive integers.
• Sort the array in non-increasing order and return the Kth element.

• Use a priority queue or quick select algorithm for efficient solution.

• Handle constraints like array size and element values.

• Ensure all elements in the array are distinct.
Answered by AI
Add your answer

Round duration - 30 minutes
Round difficulty - Medium

We had all rounds in afternoon. Environment of the office was giving positive vides. Interviewer was polite and kind.

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
Ans. 
Reverse a given string containing alphabets, numbers, and special characters.
• Iterate through the string from the end to the beginning and append each character to a new string.

• Use built-in functions like reverse() or StringBuilder in languages like Python or Java for efficient reversal.

• Handle special characters and numbers along with alphabets while reversing the string.

• Ensure to consider the constraints provided in th...read more
Answered by AI
Add your answer