Kellton Full Stack Developer Interview Questions and Answers

Q1. Difference between authentication and authorization
Ans. 
Authentication verifies the identity of a user, while authorization determines what a user can access.
• Authentication confirms the user's identity through credentials like passwords or biometrics

• Authorization controls the user's access to resources or features based on their identity and permissions

• Example: Logging into a website with a username and password is authentication, while being able to view/edit specific page
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Q2. What is promises
Ans. 
Promises are objects representing the eventual completion or failure of an asynchronous operation.
• Promises are used to handle asynchronous operations in JavaScript.

• They can be in one of three states: pending, fulfilled, or rejected.

• Promises can be chained using .then() to handle success and .catch() to handle errors.
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Q3. What is rxjs and its uses
Ans. 
RxJS is a library for reactive programming using Observables to handle asynchronous data streams.
• RxJS stands for Reactive Extensions for JavaScript.

• It allows you to work with asynchronous data streams and handle events.

• RxJS provides operators to transform, filter, combine, and create observables.

• Example: Using RxJS to handle user input events in a web application.
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Q1. About HTML, CSS, JS, Python ?
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Q2. What is Self Keyword in python?
Ans. 
The self keyword in Python is a reference to the current instance of a class.
• Self is the first parameter in the definition of instance methods within a class.

• It is used to access variables and methods within the class.

• Self is not a reserved keyword in Python, but it is a convention to use self as the first parameter in instance methods.
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Q1. They Not Schedule Client Interview
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Aptitude
Logically reasoning
Verbal

Q1. Tell me about yourself 1 coding questions on arrays Few questions on DSA Few questions on DBMS About my project
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Q2. To remove the duplicate elements fromthe array
Ans. 
Use Set data structure to remove duplicate elements from the array.
• Create a Set from the array to automatically remove duplicates.

• Convert the Set back to an array to get the unique elements.

• Example: const array = ['apple', 'banana', 'apple', 'orange'];

• Example: const uniqueArray = [...new Set(array)];
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Q1. Difficulty faced while working on projects About the project
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Q1. CTC from the previous employer
Ans. 
CTC from previous employer is confidential information.
• CTC from previous employer is considered confidential

• It is not appropriate to disclose salary details from previous job

• Focus on discussing your skills and experiences instead of previous salary
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Q2. Expected CTC for applying in neosoft
Ans. 
Expected CTC should be based on industry standards, experience, skills, and location.
• Research industry standards for Full Stack Developers in the specific location

• Consider your experience level and skills when determining expected CTC

• Factor in the cost of living in the location where the job is based

• Be prepared to negotiate based on the job responsibilities and benefits offered
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Coding test in javascript and question related to the tech stack

Q1. If there is any conflict between you and you coworker, what would you do
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Q1. Question related to C#
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Q1. Cloning and its type
Ans. 
Cloning is the process of creating an exact copy of an object or organism.
• There are two main types of cloning: reproductive cloning and therapeutic cloning.

• Reproductive cloning involves creating a genetically identical copy of an organism, such as Dolly the sheep.

• Therapeutic cloning is the process of creating embryonic stem cells for medical research and treatment.

• Cloning can also refer to making copies of software or
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Q2. Difference between final and finalize
Ans. 
final is a keyword in Java used to declare constants, while finalize is a method in Java used for cleanup operations.
• final is used to declare constants in Java

• final variables cannot be reassigned

• finalize is a method in Java used for cleanup operations before an object is garbage collected
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Q1. Some Basic Question from your technologies
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Q1. Some technical question and coding test. basic palindrom, and some basic algo question
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Q1. Salary discussion only
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