Javascript interview questions part 15
Javascript interview questions part 15
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Total Questions: 20
1. In which format does JavaScript support external JavaScript?
Correct Answer is : .js
2. What are the two parts of JavaScript libraries?
Correct Answer is : External JavaScript and the “script” tag
3. Which of the following is added to prefs.js when the console is automatically opened during JavaScript error?
Correct Answer is : user_pref("javascript.console.open_on_error", true);
4. Which of the following is possible to be referenced in external JavaScript?
Correct Answer is : php
5. Which of the following attribute takes the source of the PHP file?
Correct Answer is : src
6. What kind of path can the PHP file be?
Correct Answer is : Either Absolute or Relative
7. Which of the following global variables is used to get parameters?
Correct Answer is : $HTTP_GET_VARS[].
8. What is the purpose of the RegExp method test()?
Correct Answer is : Tests for a match in its string parameter
9. What is the purpose of the function parameter filetype?
Correct Answer is : File type to be expected
10. Which of the following is the method used to add an element to the desired location?
Correct Answer is : element.appendChild()
11. What is it called when we make a mistake in the script?
Correct Answer is : Bug
12. Which of the following is the definition for debugging?
Correct Answer is : Both Finding & Fixing bugs
13. Where is the error icon shown in the Internet Explorer?
Correct Answer is : Status bar
14. Where is the error icon option available?
Correct Answer is : Tools
15. Which of the following is the window that the Firefox sends the error messages to?
Correct Answer is : Error Console
16. What is the procedure to view the console in the Firefox?
Correct Answer is : Tools->Error Console
17. What is the other way of calling the Error Console in Firefox?
Correct Answer is : JavaScript Console
18. What kind of error notifications are shown in the console window?
Correct Answer is : Both Syntax error and Runtime error
19. How do we debug a script?
Correct Answer is : Use of JavaScript Validator & Debugger
20. What is the purpose of a JavaScript debugger?
Correct Answer is : Placing script execution under control
