iFlair Web Technologies Full Stack Web Developer Interview Questions and Answers

Event Loop in JavaScript manages the execution of multiple tasks in a single-threaded environment.

• Event Loop is responsible for handling asynchronous operations in JavaScript.

• It continuously checks the call stack and the task queue, moving tasks from the queue to the stack when the stack is empty.

• Tasks like setTimeout, setInterval, and AJAX requests are handled by the Event Loop.

• Event Loop ensures that JavaScript remai

Sharding in Node.js involves splitting a database into smaller parts to improve performance and scalability.

• Sharding is a technique used to horizontally partition data across multiple servers or databases.

• It helps distribute the load evenly and improves performance by allowing parallel processing of queries.

• In Node.js, sharding can be implemented using libraries like MongoDB's sharding feature or custom sharding logic

Indexing in Node.js is a way to optimize data retrieval by creating indexes on specific fields in a database.

• Indexing in Node.js can be done using libraries like Mongoose for MongoDB databases.

• Indexes can improve query performance by allowing the database to quickly locate the requested data.

• Example: Creating an index on a 'username' field in a user collection can speed up queries searching for a specific user.