Kellton DOT NET Developer Interview Questions and Answers for Freshers

Q1. C# basic and .net
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Q1. Opps interview questions
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Q2. Some of the interview question base on mysql and collecections
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Q1. Java basic Spring boot
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Q1. Tell me about yourself Strength and weakness
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There was 10 question

Q1. What is array and strings
Ans. 
Arrays are a collection of elements of the same data type, while strings are a sequence of characters.
• Arrays can store multiple values in a single variable, accessed by index.

• Strings are a special type of array that store sequences of characters.

• Example: Array - [1, 2, 3], String - 'hello world'
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Q2. Write a code of prime number
Ans. 
Code to check if a number is prime or not
• Use a loop to check if the number is divisible by any number other than 1 and itself

• If the number is only divisible by 1 and itself, it is a prime number

• Example: Check if 7 is prime - loop from 2 to 6, no number divides 7 evenly
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Q1. What is Dependency Injection?
Ans. 
Dependency Injection is a design pattern that allows objects to receive dependencies rather than creating them internally.
• DI is a way to achieve loose coupling between objects

• It helps in creating more testable and maintainable code

• DI can be implemented using constructor injection, property injection, or method injection

• Example: Instead of creating a database connection object inside a class, we can inject it from outsi...read more
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Q2. What are the Design patterns?
Ans. 
Design patterns are reusable solutions to common software development problems.
• Design patterns provide proven solutions to recurring problems in software development.

• They help in creating code that is more flexible, reusable, and maintainable.

• Some common design patterns include Singleton, Factory, Observer, and Decorator.

• Design patterns can be categorized into three types: Creational, Structural, and Behavioral.
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Q1. What are the differences between .Net and .Net Core?
Ans. 
The main difference is that .NET Core is open-source and cross-platform while .NET Framework is Windows-only.
• Both are used for building Windows applications, but .NET Core can also be used for web and cloud applications.

• .NET Core has a smaller runtime and can be deployed as a single executable file.

• .NET Core supports Docker containers and can be used on Linux and macOS.

• .NET Framework has a larger runtime and requires i...read more
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Q1. What is the Expected CTC?
Ans. 
Expected CTC depends on various factors such as experience, skills, location, and company policies.
• Expected CTC can vary based on the candidate's experience and skills.

• Location can also play a role in determining the Expected CTC.

• Company policies and budget can also impact the Expected CTC.

• It is important to research industry standards and negotiate based on market rates.

• Providing a specific number may limit negotiatio
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It was very tough and one need lot of practice

Q1. They just ask the basics but if the resume is good then they may ask little more tough questions
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Q1. This is as always easy round they just about ourself bla bla
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Round duration - 150 minutes
Round difficulty - Medium

In this round, there were 4 sections of MCQs, along with two coding questions. It lasted for 2.5 hours in which the camera was on along with the microphone on the platform AMCAT. One coding question was of hard difficulty level of graph and another was of medium level difficulty question of dynamic programming. MCQ part was quite easy with a timer, on each sub part and can be easily solved.

Q1. Count nodes within K-distance
You are given a connected, undirected and acyclic graph with some of the nodes as marked and a positive number 'K'. You need to return the count of all such nodes whic...read more
Ans. 
Step1 : I solved this problem using breadth first search.
Step 2 : Main thing to observe in this problem is that if we find two marked nodes which are at largest distance from each other considering all pairs of marked nodes then if a node is at a distance less than K from both of these two nodes then it will be at a distance less than K from all the marked nodes because these two nodes represents the extreme limit of a...read more
Answered by CodingNinjas
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Q2.  Ways To Make Coin Change
You are given an infinite supply of coins of each of denominations D = {D0, D1, D2, D3, ...... Dn-1}. You need to figure out the total number of ways W, in which you can make a ch...read more
Ans. 
1. Firstly, I coded the problem using recursion, but I got TLE after submission.
2. Then, I optimized, using dynamic programming, but the time I could submit the code, the time was up, and I was not able to submit.
Answered by CodingNinjas
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Round duration - 30 minutes
Round difficulty - Medium

There were around 40 people shortlisted after round 1, for the interview, round, in the morning PPT was held, after which the interviews were scheduled, for 30 minutes till 6 pm in the evening, 
my interview was at 4.30 pm 
Interviewer was straight forward, and direct in approach, and did not waste even a single second of his or mine. Sharp after 30 minutes the interview was ended. 
through out the interview, he was friendly, and just observing.
Firstly, 3 coding questions, were asked, then 2 concepts of java and 1 concept of data structures was asked. 
the question related to java were, demon thread and platform independence. In data structures, I was asked to give brief intro regarding the AVL trees.

Q1.  Occurrence of X in a Sorted Array
You have been given a sorted array/list of integers of size N and an integer X. Find the total number of occurrences of X in the array/list.
Input Format
The first line...read more
Ans. 
1. I started with linear search
2. Then when I said Binary search, I was asked to write pseudo code and explain it.
3. I covered all the test cases, including the corner cases.
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Q2. Merge sort
Given a sequence of numbers ‘ARR’. Your task is to return a sorted sequence of ‘ARR’ in non-descending order with help of the merge sort algorithm.
Example :
Merge Sort Algorithm -

Merge so...read more
Ans. 
1. I was asked to directly code the solution.
2. I followed the same, and coded, it, in between the interviewer stopped me and said, I got you, lets move to next question.
3. I followed this approach, divided the input array into two halves, calls itself for the two halves, and then merge the two sorted halves. The merge() function is used for merging two halves. The merge(arr, l, m, r) is a key process that assumes that...read more
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Q3. Implement Stack with Linked List
You need to implement the Stack data structure using a Singly Linked List.
Create a class named 'Stack' which supports the following operations(all in O(1) time):
...read more
Ans. 
1. Firstly, I made the structure of linked list.
2. Then, I made the four functions, of stack pop, push, empty and full.
3. And when I started to explain the written code, the interviewer was well convinced, and said no need, I understood, it and moved to theory questions of java.
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Round duration - 15 minutes
Round difficulty - Easy

The interview was scheduled at 4.30 pm again, and due to network issue, my audio was not clear to the interviewer, but the interviewer was highly cooperating, he called me over phone to take the interview, and video was on through the zoom meet only. 
The interview was like a discussion from both ends, which went very satisfying for me as a candidate and the interviewer too.
Before the interview in the morning, we were given the topics on which we had to write 100 words.

Q1. Why are you not nervous before the interview?
Ans. 
Tip 1 : Be honest
Tip 2 : Treat the HR interviewer as your friend. 
Tip 3 : Never speak anything, falsely just to create impression.
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Q2. Give me a brief introduction.
Ans. 
Tip 1 : Try to cover all the points from name to all the professional achievements.
Tip 2 : Try to include your hobbies too. 
Tip 3 : Always mention your goals
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Q3. Why do you want to stop at becoming an engineer, being the star performer?
Ans. 
Tip 1 : Always take your time, to analyze what the interviewer is actually asking, never run into and spoil the things.
Tip 2 : In this question, the interview wanted to know my future goals, answer it in a way that shows that job is important for you. 
Tip 3 : Take stand for your statement, and try to relate it with stories.
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Q4. How many trees are there in you college?
Ans. 
Tip 1 : These questions should not be answered quickly with false guesses. 
Tip 2 : Analyze in your mind whatever comes, like there are 5 trees in these regions, and there are total of 10 areas containing trees in college, and reach the solution. 
Tip 3: Whatever strategy you have followed, put it forward to the interviewer, explaining everything.
Answered by CodingNinjas
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