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interview-questions.md

Interview Questions

To help commit to memory, write down your responses in your notebook - do not type them on your computer.

General Web

  • In as much detail as possible, explain how you would localize an application.
  • Tell me two advantages of testing your code.
  • Name three strategies for fixing cross-browser inconsistencies.
  • What are some tools and strategies you use to prevent shipping unstable code to production?
  • What factors influence whether you’ll take a progressive enhancement vs. graceful degradation approach to building an application?
  • Define the term ‘MVC’ and explain how an application is architected when following MVC patterns.
  • What does CORS stand for and what issue does it address?
  • In as much detail as possible, describe the request-response cycle.

CSS

  • Tell me 3 new features of CSS3.
  • Can you describe what responsive design is to you and how you would implement it?
  • What's the difference between display: inline and display: inline-block?
  • What is a pseudo class? What are they used for?
  • Describe z-index and how stacking context is formed.
  • If you have two elements inside of an outer containing element, one with float: left; and the other with float: right, how can you ensure that the containing element expands around the floated elements and does not collapse?

JavaScript

  • Why is it, in general, a good idea to leave the global scope of a website as-is and never touch it?
  • What does event bubbling or event propagation mean?
  • What’s the difference between undefined and null
  • In as much detail as possible, explain how JSON Web Tokens work.
  • What is Ajax?
  • What is "use strict";? What are the advantages and disadvantages to using it?
  • Explain why the following doesn't work as an IIFE: function foo(){ }();. What needs to be changed to properly make it an IIFE? Why?
  • What are the pros and cons of using Promises instead of callbacks?
  • What is a closure, and how/why would you use one?
  • What advantages does React offer? What about disadvantages?

HTML

  • Why is it generally a good idea to position CSS <link>s between <head></head> and JS <script>s just before </body>? Do you know any exceptions?
  • In an HTML file, what does the 'doctype' keyword do?
  • Give an example of a self-closing HTML tag.
  • What’s the difference between window.onload and onDocumentReady
  • Give an example of an element that is considered a 'block-level' element? An example of an inline element? What's the difference between block-level and inline elements?
  • What could we use instead of <b> tags for bold and <i> tags for italics to make our HTML more semantic?
  • What is the purpose of article, section, header and footer tags? Please explain with an example and why we should not use divs.
  • What are HTML data attributes?
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