About the FSR - Interview Questions category

[titiksha.chakraborty]

Hi everyone Post your FSR Program - Interview related questions and answers here and prepare yourself for the bright future ahead!

[rrnayak2609]

@titiksha.chakraborty

1. HTML/CSS:

• Can you explain the box model in CSS?
  Answer: The box model in CSS is the way elements are rendered on a web page. It consists of the content area, padding, border, and margin. The content area is where the actual content of the element is displayed. Padding is the space between the content and the border. The border is the line around the element, and the margin is the space between the border and the neighboring elements.

2. JavaScript:

• What is the difference between let and var in JavaScript?
  Answer: var is function scoped, while let is block scoped. This means that if you declare a variable with var inside a function, it will be available throughout the function, while if you declare a variable with let inside a block (such as an if statement), it will only be available within that block.

3. React:

• What is the Virtual DOM in React?
  Answer: The Virtual DOM is a lightweight representation of the actual DOM. React uses it to optimize updates and minimize the number of changes that need to be made to the actual DOM. When a change is made to the Virtual DOM, React compares it to the previous version and determines what changes need to be made to the actual DOM to update the page.

4. MongoDB:

• What is a collection in MongoDB?
  Answer: A collection in MongoDB is a group of documents (similar to a table in a relational database). It can be thought of as a container for documents that have a similar structure or belong together in some way. Collections can be indexed for faster searches, and documents can be added, updated, or deleted from a collection.

5. Data Structures and Algorithms:

• What is the time complexity of a linear search algorithm?
  Answer: The time complexity of a linear search algorithm is O(n), where n is the number of elements in the array being searched. This is because in the worst case, the algorithm may need to examine every element in the array to find the desired element.

6. Node.js:

• What is Node.js?
  Answer: Node.js is a JavaScript runtime built on Chrome’s V8 JavaScript engine. It allows developers to write server-side JavaScript code and execute it outside of the browser environment. It is commonly used for building scalable, high-performance web applications and APIs.

7. MySQL:

• What is a foreign key in MySQL?
  Answer: A foreign key in MySQL is a field or a group of fields in a table that refer to the primary key of another table. It is used to establish a relationship between two tables, where the foreign key table references the primary key of the other table. This helps to enforce referential integrity and ensures that data in both tables remains consistent.