Javascript interview questions part 40
Javascript interview questions part 40
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Total Questions: 20
1. Rhino is originated by _______
Correct Answer is : Mozilla
2. Which of the following are global functions that are not part of core JavaScript?
Correct Answer is : spawn(f);
3. Which Rhino command quits Rhino environment?
Correct Answer is : quit()
4. Which is a useful way to try out small and simple Rhino programs and one-liners?
Correct Answer is : Starting an interactive shell
5. Which is a more formal way of importing packages and classes as JavaScript objects?
Correct Answer is : importClass(java.util.*);
6. Consider the following code snippet var f = new java.io.File("/tmp/test"); var out = new java.io.FileWriter(f); out instanceof java.io.Reader What will be the output for the above code snippet?
Correct Answer is : FALSE
7. What does Rhino do when the getter and setter methods exist?
Correct Answer is : It becomes JavaScript properties
8. The JavaScript classes can be instantiated using _____ operator.
Correct Answer is : new
9. The new Java arrays can be created into JavaScript programs using which of the following classes?
Correct Answer is : java.lang.reflect.Array
10. What are the events generated by the Node objects called?
Correct Answer is : emitters
11. What is the function used to deregister event handler ‘f’?
Correct Answer is : removeListener(name,f)
12. What is the function used to remove all handlers for name events?
Correct Answer is : removeAllListeners(name)
13. Which function is a synonym for on()?
Correct Answer is : addListener()
14. Which of the following is an event emitter?
Correct Answer is : process
15. When do uncaught exceptions generate events?
Correct Answer is : When handlers are registered
16. Which among the following POSIX signals generate events?
Correct Answer is : SIGINT
17. What is the method used to pause “data” events?
Correct Answer is : s.pause();
18. What will be the return value of the write() method when the Node cannot write the data immediately and has to buffer it internally?
Correct Answer is : FALSE
19. Consider the following code snippet let succ = function(x) x+1, yes = function() true, no = function() false; What convenience does the above code snippet provide?
Correct Answer is : Functional behaviour
20. Consider the following code snippet data.sort(function(a,b),b-a); What does the above code do?
Correct Answer is : Sort in reverse numerical order
