Bottom Funnel Mern Stack Developer Interview Questions and Answers

The problem statement was given to solve.

Q1. Explain liskov substitution principle with examples?
Ans. 
Liskov Substitution Principle states that objects of a superclass should be replaceable with objects of its subclasses without affecting the program's correctness.
• Subtypes must be substitutable for their base types.

• Derived classes should be able to extend the functionality of base classes without changing their behavior.

• Violating this principle can lead to unexpected behavior in the program.

• Example: If a Square class i...read more
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Q2. Importance of abstraction
Ans. 
Abstraction is crucial in software development to simplify complexity, improve readability, and promote reusability.
• Abstraction helps in hiding unnecessary details and focusing on essential features.

• It allows developers to work at a higher level of understanding without getting bogged down in implementation details.

• Abstraction promotes code reusability by creating modular and reusable components.

• It improves code readab...read more
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Q3. Importance of Unit testing in clean close
Ans. 
Unit testing is crucial in ensuring clean code by verifying the functionality of individual units of code.
• Unit testing helps in identifying bugs and errors early in the development process.

• It ensures that each unit of code works as expected in isolation.

• Unit tests act as documentation for the codebase, making it easier for new developers to understand and modify the code.

• It promotes code reusability and maintainability...read more
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Q1. Java based , collection framework related
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Q1. Magento Related Questions
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Q2. PHP, MySQL & jQuery questions
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Q3. Introduction and Previous Company experience
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Q1. Why do you want to join this company & discuss Salary?
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Q1. It was One-on-one Round, purely on technical side
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There was no second round

Q1. What is front end development
Ans. 
Front end development refers to the creation of the user interface and user experience of a website or application.
• Involves HTML, CSS, and JavaScript

• Focuses on the visual and interactive aspects of a website or application

• Requires knowledge of design principles and user behavior

• Examples include creating responsive layouts, implementing animations, and optimizing page load speed
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Q2. What is meant by full stack
Ans. 
Full stack refers to the development of both front-end and back-end portions of a web application.
• Full stack developers are proficient in both front-end and back-end technologies

• They can handle databases, servers, systems engineering, and clients

• Examples of full stack technologies include HTML, CSS, JavaScript, Node.js, React, and Angular
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