KPMG lower gulf Senior Consultant Interview Questions and Answers

Node.js event loop architecture is a single-threaded, non-blocking, asynchronous I/O model.

• Node.js uses an event-driven architecture to handle I/O operations.

• The event loop is a single thread that listens for events and executes callbacks.

• Callbacks are queued in the event loop and executed in a non-blocking manner.

• Node.js uses libuv library to handle the event loop.

• The event loop allows Node.js to handle a large number

Closures are functions that have access to variables in their outer scope. Hoisting is the behavior of moving declarations to the top of the scope.

• Closures allow for encapsulation and private variables in JavaScript.

• Hoisting can lead to unexpected behavior when variables are declared after they are used.

• Example of closure: function outer() { let x = 10; function inner() { console.log(x); } return inner; }

• Example of hoi...read more