javascript

Interview Questions and Answers

javascript

Question:
To put a "close window" link on a page ?
Answer:
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javascript - Questions
1. How do you convert numbers between different bases in JavaScript?
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2. how to force a page to go to another page using JavaScript ?
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3. How to convert numbers to strings using JavaScript?
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4. How tp create Arrays using JavaScript ?
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5. How to delete an entry using JavaScript?
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6. How to create an object using JavaScript?
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7. decodeURI(), encodeURI()
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8. How do we add JavaScript onto a web page?
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9. Is JavaScript case sensitive?
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10. What are the boolean operators supported by JavaScript?
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11. What are the ways of making comments in JavaScript?
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12. How to create arrays in JavaScript?
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13. What is the use of Math Object in JavaScript?
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14. What do you understand by this keyword in JavaScript?
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15. What does 3+4+"7" evaluate to?
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16. How do you change the style/class on any element using JavaScript?
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17. What looping structures are there in JavaScript?
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18. What is the similarity between the 1st and 2nd statement?
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19. What will be the output of the following statements?var myString = 'Vikas' // Create a primitive string object. var myStringCopy = myString; // Copy its value into a new variable. var myString = null; // Manipulate the value console.log(myString, myString
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20. What would be the output of the following statements?
var object1 = { same: 'same' };
var object2 = { same: 'same' };
console.log(object1 === object2);
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21. Does JavaScript Support automatic type conversion, If yes give example.
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22. How is JavaScript different from Java?
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23. What
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24. How do we get JavaScript onto a web page?
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25. Javascript can be placed inside the element
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26. Javascript can be referenced from a separate file
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27. How to read and write a file using javascript?
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28. How can JavaScript make a Web site easier to use? That is, are there certain JavaScript techniques that make it easier for people to use a Web site?
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29. How can JavaScript be used to improve the "look and feel" of a Web site? By the same token, how can JavaScript be used to improve the user interface?
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30. How do you target a specific frame from a hyperlink?
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31. Where are cookies actually stored on the hard disk?
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32. What can javascript programs do?
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33. How can JavaScript be used to personalize or tailor a Web site to fit individual users?
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34. What does isNaN function do?
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35. What is negative infinity?
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36. What is the data type of variables of in JavaScript?
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37. What does the "Access is Denied" IE error mean?
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38. Is a javascript script faster than an ASP script?
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39. How to embed javascript in a web page?
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40. What are the problems associated with using JavaScript, and are there JavaScript techniques that you discourage?
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41. What does "1"+2+4 evaluate to?
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42. How to get the contents of an input box using Javascript?
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43. How to set the focus in an element using Javascript?
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44. What is the difference between an alert box and a confirmation box?
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45. What is a prompt box?
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46. Taking a developerÍs perspective, do you think that that JavaScript is easy to learn and use?
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47. How about 2+5+"8"?
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48. What does the EnableViewStateMac setting in an aspx page do?
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49. What does javascript null mean?
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50. What is this keyword?
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