☛ Explain event delegation

☛ Explain how this works in JavaScript

☛ Explain how prototypal inheritance works

☛ How do you go about testing your JavaScript?

☛ What do you think of AMD vs CommonJS?

☛ Explain why the following doesn't work as an IIFE: function foo(){ }();.

☛ What needs to be changed to properly make it an IIFE?

☛ What's the difference between a variable that is: null, undefined or undeclared?

☛ How would you go about checking for any of these states?

☛ What is a closure, and how/why would you use one?

☛ What's a typical use case for anonymous functions?

☛ How do you organize your code? (module pattern, classical inheritance?)

☛ What's the difference between host objects and native objects?

☛ Difference between: function Person(){}, var person = Person(), and var person = new Person()?

☛ What's the difference between .call and .apply?

☛ Explain Function.prototype.bind.

☛ When would you use document.write()?

☛ What's the difference between feature detection, feature inference, and using the UA string?

☛ Explain AJAX in as much detail as possible.

☛ Explain how JSONP works (and how it's not really AJAX).

☛ Have you ever used JavaScript templating?

☛ If so, what libraries have you used?

☛ Explain "hoisting".

☛ Describe event bubbling.

☛ What's the difference between an "attribute" and a "property"?

☛ Why is extending built in JavaScript objects not a good idea?

☛ Difference between document load event and document ready event?

☛ What is the difference between == and ===?

☛ Explain the same-origin policy with regards to JavaScript.

☛ What is "use strict";? what are the advantages and disadvantages to using it?

☛ Create a for loop that iterates up to 100 while outputting "fizz" at multiples of 3, "buzz" at multiples of 5 and "fizzbuzz" at multiples of 3 and 5

☛ Why is it, in general, a good idea to leave the global scope of a website as-is and never touch it?

☛ Why would you use something like the load event? Does this event have disadvantages? Do you know any alternatives, and why would you use those?

☛ Explain what a single page app is and how to make one SEO-friendly.

☛ What is the extent of your experience with Promises and/or their polyfills?

☛ What are the pros and cons of using Promises instead of callbacks?