Front end developer Interview Questions - Part 1

1. When would you use CSS float?
2. When would you use CSS clear?
3. What is REST?
4. What is Web Components?
5. What is the difference between sessioStorage, localStorage and cookies?
6. What is the type of NaN? How to check if a value is NaN?
7. What is the difference between bubbling and capturing?
8. Is there any difference between Promises and callbacks? Which is better?
9. What is the difference between Deferred and Promise objects? Where is Deferred object used?
10. Difference between inheritance and composition?
11. Difference between window.onload and onDocumentReady?
12. Why do we need to use W3C standard code?
13. What Are The Various Elements Provided By HTML5 For Media Content?