LeewayHertz Technologies Software Developer Trainee Interview Questions and Answers

Basic Javascript and MERN Stack questions

Q1. React Basic, Asked About Project
Add your answer
Q2. Write a code to call an api and display the data.
Ans. 
Code to call an API and display data
• Use a library like Axios or Fetch to make the API call

• Parse the response data and display it on the frontend

• Handle any errors that may occur during the API call
Answered by AI
Add your answer

Q1. Not asked any thing other than introduction, the interview is of only 10 minutes
Add your answer

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
Answered by AI
Add your answer
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
Answered by AI
Add your answer

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
Answered by AI
Add your answer
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.
Answered by AI
Add your answer

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
Answered by AI
Add your answer
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
Answered by AI
Add your answer

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.
Add your answer
Q2. Php, laravel, MySQL
Add your answer

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.
Answered by AI
Add your answer
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
Answered by AI
Add your answer

Q1. Simple self introduction
Add your answer
Q2. String pole in Java
Ans. 
String pool in Java is a mechanism for optimizing memory usage by reusing strings with the same value.
• String pool is a special area in the Java heap memory where strings are stored.

• When a new string is created, Java first checks if it already exists in the string pool.

• If the string already exists, the new string references the existing one instead of creating a new object.

• Example: String str1 = "hello"; String str2 = "...read more
Answered by AI
Add your answer

Question will be from an Online coding platform and it was basic to medium.