Javascript Interview questions

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0. How to read and write a file using javascript?
1. What is JavaScript?
2. How to detect the operating system on the client machine?
3. Where are cookies actually stored on the hard disk?
4. What can javascript programs do?
5. How to set a HTML document's background color?
6. What does the "Access is Denied" IE error mean?
7. Is a javascript script faster than an ASP script?
8. Are Java and JavaScript the Same?
9. How to embed javascript in a web page?
10. How to access an external javascript file that is stored externally and not embedded?
11. What is the difference between an alert box and a confirmation box?
12. What is a prompt box?
13. Can javascript code be broken in different lines?
14. How to hide javascript code from old browsers that dont run it?
15. How to comment javascript code?
16. Name the numeric constants representing max,min values
17. What does javascript null mean?
18. What does undefined value mean in javascript?
19. What is the difference between undefined value and null value?

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