HyScaler Software Developer Trainee Interview Questions, Process, and Tips

Q1. What is the difference between== and === in javascript?
Ans. 
In JavaScript, == is used for loose equality comparison, while === is used for strict equality comparison.
• == checks for equality after type coercion, while === checks for equality without type coercion

• === is more strict and recommended for use to avoid unexpected behavior

• Example: 1 == '1' will return true, but 1 === '1' will return false
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Q2. == refers to only value comparison and === refers to both data type and value comparison
Ans. 
True. == compares only values, while === compares both values and data types.
• == is used for value comparison, while === is used for both value and data type comparison

• Example: 5 == '5' will return true, but 5 === '5' will return false

• Example: 5 === 5 will return true, as both value and data type are the same
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5 technical questions were asked out of which 3 tests are to be cleared

Q1. What is NVM?
Ans. 
NVM stands for Node Version Manager, a tool used to manage multiple versions of Node.js on a single machine.
• NVM allows developers to easily switch between different versions of Node.js for different projects.

• It helps in avoiding conflicts between different projects that require different versions of Node.js.

• NVM is commonly used in development environments where different projects have different Node.js version requirem
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Q2. Node version Manager where we can handle higher node js version in a lower node js version
Ans. 
Node Version Manager (NVM) allows managing multiple Node.js versions on the same machine.
• NVM allows you to easily switch between different Node.js versions on your machine.

• It helps in handling higher Node.js versions in a lower Node.js version environment.

• You can install, uninstall, and switch between Node.js versions using NVM.

• Example: 'nvm install 12.18.3' to install a specific Node.js version.
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Basic String and Array related questions.

A project will be assigned, a basic CRUD operation.

Q1. Which will you prefer MySQL or Mongo for your database and why?
Ans. 
I would prefer MySQL for structured data and complex queries, while MongoDB for unstructured data and scalability.
• MySQL is better for structured data and complex queries

• MongoDB is better for unstructured data and scalability

• MySQL supports ACID transactions, while MongoDB is eventually consistent

• MySQL is widely used in traditional relational databases, while MongoDB is popular for NoSQL databases
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Q2. What is Virtual Dom and explain?
Ans. 
Virtual DOM is a lightweight copy of the actual DOM in memory, used for efficient updates in web development.
• Virtual DOM is a concept used in frameworks like React to improve performance by minimizing actual DOM manipulations.

• When changes are made to the virtual DOM, a diffing algorithm is used to identify the minimal changes needed to update the actual DOM.

• This approach reduces the number of updates needed and improve
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There were 5 coding questions in which you have to score minimum 3 to qualify for the next rounds.

An assignment was give which we have to complete it with in 7 days.

Q1. About project tech stacks.
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Q2. Php, laravel, MySQL
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Q1. What is Laravel Middleware?
Ans. 
Laravel Middleware is a filter that is executed before or after an HTTP request enters the application.
• Middleware can modify the request before it reaches the route handler.

• It can also modify the response before it is sent back to the client.

• Middleware can be used for authentication, logging, CORS, etc.

• Example: 'auth' middleware in Laravel checks if the user is authenticated before allowing access to a route.
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Q2. What is Laravel Sanctum?
Ans. 
Laravel Sanctum is a lightweight package for API authentication using tokens in Laravel applications.
• Provides a simple API token authentication system for SPAs and mobile apps

• Uses API tokens to authenticate users without the need for passwords

• Supports token abilities for fine-grained access control

• Easy to integrate and use in Laravel applications
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