Advanced JavaScript Questions

Hello Friend,

I am sharing few questions which are most important in JavaScript. These are advanced concepts in JavaScript. You can refer my previous posts to go through them thoroughly.

1. Hoisting concept
2. OOPs in JavaScript
1. Prototypal and classical model
2. Inheritance
3. Polymorphism
4. Encapsulation (modeling)
3. Closure
4. What is prototype
5. What is __proto__
6. What is new in JavaScript
7. What is bubbling
8. Will the methods added later in prototype available in the object which is created earlier
9. What is constructor in function prototype
10. Scoping in JavaScript (function level vs block level)
11. What is this
12. How function work as constructor
13. In how many ways we can declare functions
14. Can you create a function which will add n numbers (n is not fixed)
15. Number of way we can call the functions in JavaScript
16. What is JSONP
17. What is CORS
18. Does inner function get access to the outer function "this"? If not how we can use "this" object inside inner function
19. Why we use JQuery reference from CDN
20. Is JavaScript multi-threaded or single threaded?
21. How setTimeOut works in JavaScript? What is setInterval?
22. What is Event Loop in JavaScript?
23. How to create clone of a object?
24. How to compare 2 objects are same or not?
25. How to Swap 2 elements of an array by using Array functions available in JavaScript
26. What is the difference between document.ready and window.load?
27. How to check if one variable is of type Array?
28. How can you empty an array in JavaScript? What will happen if you use arr.length = 0 ?
29. Explain complete rendering of a page. Suppose you hit www.google.com, explain all the process step by step.
30. How to remove one property from an Object in JavaScript
31. What is instanceof operator in JavaScript?
32. What are Function, Method, and Constructor in JavaScript? How to implements these in JavaScript?
33. What is self invoking function in JavaScript and what is the use of it?
34. What are the design pattern in JavaScript?
35. What is singleton pattern? How we can achieve singleton pattern in JavaScript?
36. In how many way you can create object in JavaScript?
37. What is Publisher Subscriber architecture in JavaScript? How we can implement this?
38. How to flatten an object in JavaScript?
39. How to un-flatten object in JavaScript?
40. How to prevent object modification in JavaScript? What is the difference between seal and freeze
41. What is strict mode ("use strict") in JavaScript?
42. Write a function to merge 2 objects dynamically in JavaScript.

Answers for all the above questions will be posted soon...