SpiderLogic 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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There are 4 coding questions in first round

Q1. Some basic statistics questions and data structure questions
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Q1. Tell me about your self?
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Q2. What is oops in javascript?
Ans. 
Object-oriented programming concepts in JavaScript.
• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Inheritance: Objects can inherit properties and methods from other objects.

• Polymorphism: Objects can share the same interface but have different implementations.
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Q3. What is props in react js?
Ans. 
Props in React JS are read-only properties that are passed from parent components to child components.
• Props allow you to pass data from a parent component to a child component.

• Props are immutable and cannot be changed by the child component.

• Props are accessed in the child component using this.props.

• Example: where 'name' is a prop passed from the parent component.
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Q4. Props in react js?
Ans. 
Props in React JS are used to pass data from parent components to child components.
• Props are read-only and cannot be modified by the child component.

• Props are passed down the component tree using custom attributes.

• Props help in creating reusable components by passing dynamic data.

• Example:
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Aptitude, Coding and IQ

Q1. What is Web Worker
Ans. 
Web Worker is a JavaScript API that allows running scripts in background threads to improve performance.
• Web Worker helps in offloading tasks from the main thread to improve responsiveness of web applications.

• Web Worker can be used for tasks like heavy calculations, image processing, and network requests.

• Communication between the main thread and Web Worker is done using message passing.

• Web Worker runs in a separate glob
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Q2. Explain prototypes in javascript
Ans. 
Prototypes in JavaScript are used for inheritance and allow objects to inherit properties and methods from other objects.
• Prototypes are used to add new properties or methods to all instances of an object.

• Objects in JavaScript have a prototype property, which points to another object.

• When a property or method is accessed on an object, JavaScript will first look for it on the object itself, and then on its prototype chai...read more
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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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First round is aptitude test means it contains some coding,Eng ,apptitude mcqs and one coding ques

Q1. They asked about oops concepts
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Q2. They also asked about dbms concepts
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Q3. They also asked coding ques
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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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