LeewayHertz Technologies Software Developer Trainee Interview Questions and Answers

Basic Javascript and MERN Stack questions

Q1. React Basic, Asked About Project
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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
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Q1. Not asked any thing other than introduction, the interview is of only 10 minutes
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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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Q1. Simple self introduction
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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
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Question will be from an Online coding platform and it was basic to medium.

In coding round there is 5 questions you can use any language for any questions.