General:

• What version control systems have you used?
• What is your preferred development environment? (OS, Editor, Browsers, Tools etc.)
• Can you describe your workflow when you create a new feature?
• Can you describe the difference between progressive enhancement and graceful degradation?
• What does "minification" do?
• If you have 8 different stylesheets for a given design, how would you integrate them into the site?
• What tools do you use to test your code's performance?
• If you could master one technology this year, what would it be?
• Name 3 ways to decrease page load. (perceived or actual load time)
• Explain the importance of standards.

HTML:

• What's a doctype do, and how many can you name?
• How do you serve a page with content in multiple languages?
• What are data- attributes good for?
• Describe the difference between cookies, sessionStorage and localStorage.

Javascript

• Which JavaScript libraries have you used?
• How is JavaScript different from Java?
• What are undefined and undeclared variables?
• What is a closure, and how/why would you use one?
• What's a typical use case for anonymous functions?
• Explain the "JavaScript module pattern" and when you'd use it.
• 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() var person = new Person()

• What's the difference between .call and .apply?
• explain Function.prototype.bind?
• When do you optimize your code?
• Can you explain how inheritance works in JavaScript?
• When would you use document.write()?
• 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, and if so, what/how?
• 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 how you would get a query string parameter from the browser window's URL.
• Explain the same-origin policy with regards to JavaScript.
• Explain event delegation.
• Describe inheritance patterns in JavaScript.

Javascript Code:

>~~3.14

Question: What value is returned from the above statement?

"i'm a lasagna hog".split("").reverse().join("");

Question: What value is returned from the above statement?

( window.foo || ( window.foo = "bar" ) );

Question: What is the value of window.foo?

var foo = "Hello"; (function() { var bar = " World"; alert(foo + bar); })(); alert(foo + bar);

Question: What is the outcome of the two alerts above?

jQuery:

• Explain "chaining".
• What does .end() do?
• How, and why, would you namespace a bound event handler?
• What is the effects (or fx) queue?
• Optimize this selector:

$(".foo div#bar:eq(0)")

CSS:

• Describe what a "reset" CSS file does and how it's useful.
• Describe Floats and how they work.
• How do you serve your pages for feature-constrained browsers?
• What are the different ways to visually hide content (and make it available only for screen readers)?
• Have you ever used a grid system, and if so, what do you prefer?
• Have you used or implement media queries or mobile specific layouts/CSS?
• Any familiarity with styling SVG?
• How do you optimize your webpages for print?
• What are some of the "gotchas" for writing efficient CSS?
• Do you use CSS preprocessors?
  • If so, describe what you like and dislike about the CSS preprocessors you have used.
• How would you implement a web design comp that uses non-standard fonts?
• Explain how a browser determines what elements match a CSS selector?

Other:

• What's the coolest thing you've ever coded, what are you most proud of?
• Do you have any pet projects? What kind?