Bristlecone Software Engineer Interview Questions and Answers

A closure is a function that has access to variables in its outer (enclosing) scope.

• A closure is created when a function is defined inside another function

• The inner function has access to the outer function's variables and parameters

• Closures can be used to create private variables and methods

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

Event loop is a mechanism that allows Node.js to perform non-blocking I/O operations.

• Event loop is responsible for handling asynchronous callbacks in Node.js.

• It continuously checks the event queue for any new events and executes them one by one.

• It allows Node.js to handle multiple requests simultaneously without blocking the main thread.

• Event loop is implemented using libuv library in Node.js.

• Event loop can be visualiz...read more