Javascript interview questions part 42
Javascript interview questions part 42
Take as many assements as you can to improve your validate your skill rating
Total Questions: 20
1. Which of the following keys are set to true when the keyboard modifier keys are held down?
Correct Answer is : all of the mentioned
2. How to detect and respond to mouse drags?
Correct Answer is : Registering a mousedown handler
3. When is the mouseover event fired?
Correct Answer is : When mouse is moved over a new element
4. When is the mouseout event fired?
Correct Answer is : When mouse is no longer over an element
5. The focus and blur events are also part of
Correct Answer is : Window events
6. The element that can also register handlers for load and error events is
Correct Answer is : img
7. The events that is emulated by the jQuery library are
Correct Answer is : focusall and focusnone
8. Which event is triggered sooner when the document and its elements are ready to manipulate?
Correct Answer is : Both DOMContentLoaded & readystatechange
9. What is the purpose of the simple mode?
Correct Answer is : Removes whitespaces
10. What is a closure compiler UI?
Correct Answer is : Web application
11. What are the benefits of closure compiler?
Correct Answer is : Modularity
12. In what way is the closure compiler efficient?
Correct Answer is : Reduces the size of the JavaScript files
13. In which way can the closure compiler can be used?
Correct Answer is : Only Open source and Web application
14. What is the purpose of the advanced mode in the closure compiler?
Correct Answer is : Both Renames variables and function
15. Why is a closure template used?
Correct Answer is : Dynamically generating HTML in Java and JavaScript
16. In what way does the closure compiler help in checking the code?
Correct Answer is : Warnings
17. What is the function of the closure compiler?
Correct Answer is : Both Download faster and Run faster
18. Which function among the following lets to register a function to be invoked once?
Correct Answer is : setTimeout()
19. Which function among the following lets to register a function to be invoked repeatedly after a certain time?
Correct Answer is : setInterval()
20. Which is the handler method used to invoke when uncaught JavaScript exceptions occur?
Correct Answer is : Onerror
