4. What is the use of isNaN function?
5. What is negative infinity?
9. What is a prompt box?
13. What is === operator?
16. Does constructor return any value?
17. How can the style/class of an element be changed?
21. Explain the difference between "==" and "==="?
22. Explain the for-in loop??
23. What would be the result of 5+3+"9"?
25. What is the function of delete operator?
28. What is break and continue statements?
29. How generic objects can be created?
30. Which keywords are used to handle exceptions?
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