Khel Group Mean Stack Developer Interview Questions and Answers

One hour aptitude test based on the mathematics ,logical reasoning.

Q1. One basic question on the language you know and one SQL is asked
Add your answer
Q2. SQL query questions
Add your answer

There were questions of basic aptitude

Q1. Introduce yourself
Add your answer
Q2. About my projects
Add your answer
Q3. What is Radix sort
Ans. 
Radix sort is a non-comparative sorting algorithm that sorts integers by processing individual digits.
• Radix sort works by sorting numbers based on each digit's value, starting from the least significant digit to the most significant digit.

• It can be implemented using counting sort or bucket sort as a subroutine.

• Radix sort is efficient for sorting integers with a fixed number of digits, like phone numbers or social secur
Answered by AI
Add your answer

Round duration - 90 Minutes
Round difficulty - Medium

The first round was scheduled in the evening time.
First of all interviewer introduced himself and after my introduction 
He directly shoot first DSA question. The question was easy but conceptual. I have solved some question with same concept and he ask me to share the screen and code in online compiler. Finally I was able to get correct output with all the use cases and I was like "Half work done!"
Then he asked me very core concepts of JavaScript along with that Some Output based questions.
Then finally he asked me theory questions on React along with my experience in React. 
The interviewer was very helpful as well as polite. I don't think if he will not help me during interview I could crack the interview

Q1. 
Is the Sentence a Pangram?
Ninja is relocating to a place called NinjaGram, and for school admission, he is required to identify if a given sentence is a pangram. Your task is to assist Ninja in determini...read more
Ans. 
Yes, the sentence is a pangram if it includes every letter of the English alphabet at least once.
• Check if the sentence contains all 26 letters of the English alphabet.

• Convert the sentence to lowercase to simplify the checking process.

• Use a set to keep track of the letters present in the sentence.

• Iterate through the sentence and add each unique letter to the set.

• After iterating, check if the set contains all 26 letters.
Answered by AI
Add your answer

Aptitude questions were pretty easy like on speed etc

Coding questions were also easy like patterns code, reverse string just basics

Basic aptitude only think out of box

Q1. Static and final difference
Ans. 
Static variables belong to the class itself, while final variables cannot be changed after initialization.
• Static variables are shared among all instances of a class

• Final variables cannot be reassigned once initialized

• Static variables are initialized only once at the start of the program

• Final variables must be initialized when declared
Answered by AI
Add your answer
Q2. Patterns problem
Add your answer

Q1. Tell me about your self?
Add your answer
Q2. Checking english fluency
Add your answer

10 reasoning questions and 3 coding questions

Q1. Wap for factorial with recurrsion
Ans. 
Factorial calculation using recursion in a programming language
• Define a function that takes an integer as input

• Base case: if input is 0, return 1

• Recursive case: return input multiplied by factorial of input-1

• Example: factorial(5) = 5 * factorial(4) = 5 * 4 * factorial(3) = ... = 5 * 4 * 3 * 2 * 1 = 120
Answered by AI
Add your answer
Q2. Opps and basic core Java questions
Add your answer

Simple logic and maths based questions along with coding round

Q1. Questions on string literals
Add your answer
Q2. Array vs arraylist
Ans. 
Arrays are fixed in size, while ArrayLists can dynamically resize. Arrays are faster for accessing elements, while ArrayLists offer more flexibility.
• Arrays have a fixed size, while ArrayLists can dynamically resize.

• Arrays are faster for accessing elements, while ArrayLists offer more flexibility in terms of adding, removing, and manipulating elements.

• Example: String[] namesArray = new String[5]; ArrayList namesList = n
Answered by AI
Add your answer

Q1. My strength and weaknesses
Add your answer
Q2. Past work experiences if any
Ans. 
I have worked as a software developer for 3 years at XYZ company.
• Developed web applications using Java, Spring, and AngularJS

• Collaborated with team members to design and implement new features

• Participated in code reviews and testing processes

• Resolved technical issues and provided support to end users
Answered by AI
Add your answer

I was given 10 logical questions to solve on a portal with 30min timer.

Most question were printing of patterns, fibonacci, prime no., palindrome etc.
out of 10 questions atleast 8 has to be right to qualify.

Q1. This round is conducted by senior developer, where they ask some logical coding questions to solve on paper.
Add your answer
Q2. Some complex pattern questions.
Add your answer

Q1. This is the round with CEO who again ask for some logical question & verbal answering. All they wanna se is how you approach towards problems.
Add your answer

Q1. Salary negotiation only if you clear the one-on-one CEO round.
Add your answer