HyScaler Software Developer Trainee Interview Questions and Answers

Three questions to be solved out of five.

One assignment project will be submitted within seven days.

Q1. Technical skills will be assessed during the interview with the director
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Q1. What are your expectations from the company?
Ans. 
I expect the company to provide a supportive learning environment, opportunities for growth, and a collaborative team.
• Supportive learning environment - access to training resources, mentorship programs

• Opportunities for growth - chances to work on challenging projects, career advancement

• Collaborative team - teamwork, open communication, knowledge sharing
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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...read more
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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...read more
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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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