Synoverge Technologies Mern Full Stack Developer Interview Questions, Process, and Tips

JSX is a syntax extension for JavaScript used with React to describe what the UI should look like.

• JSX stands for JavaScript XML

• It allows developers to write HTML-like code in JavaScript

• JSX elements are transpiled into regular JavaScript function calls

Event Loop in Node.js is a mechanism that allows Node.js to perform non-blocking I/O operations by offloading tasks to the operating system.

• Event Loop is a single-threaded mechanism that handles asynchronous operations in Node.js.

• It allows Node.js to perform I/O operations without blocking the execution of other code.

• Event Loop continuously checks the event queue for new events and executes them in a loop.

• Example: setT...read more

Node.js is single threaded to optimize performance by avoiding the overhead of managing multiple threads.

• Node.js uses an event-driven, non-blocking I/O model which allows it to handle multiple requests efficiently on a single thread.

• This design choice helps in avoiding the overhead of creating and managing multiple threads, leading to better performance.

• Node.js leverages the underlying libuv library to handle asynchron

Primary key uniquely identifies each record in a table, foreign key establishes a link between two tables, unique key ensures uniqueness of values in a column.

• Primary key: uniquely identifies each record in a table, must be unique and not null.

• Foreign key: establishes a link between two tables, ensures referential integrity.

• Unique key: ensures uniqueness of values in a column, allows null values but only one null per c