JavaScript Questions

1. What will be the output of the following JavaScript code?

function printArray(a) 
{
     var len = a.length, i = 0;
     if (len == 0)
        console.log("Empty Array");
     else 
     {
// do-while loop in javascript
         do 
         {
             console.log(a[i]);
         } while (++i < len);
     }
}

2. Which object in Javascript doesn’t have a prototype?

3. how can you write into HTML output using javascript?

4. How are windows, tabs, iframes, and frames treated according to client-side javascript?

5. What will be the output of the following JavaScript code?

let x = "10";
    let y = + x;
    
    document.write(typeof y);

6. Which one of the following is correct output for the following given JavaScript code if there is a p tag with id=demo ?
functionourFunction()
{
document.getElementById("demo").innerHTML=Math.abs(-7.25);
}

7. The correct syntax to write "Hello World" in javascript.

8. Any time you include javascript variable in HTML document, you must enclose those lines inside a _______

9. Which handler is triggered when the content of the document in the window is stable and ready for manipulation?

10. Which variable is an implicit parameter for every function in javascript?

11. Which of the following is a valid function to truncate number of full minutes between two time stamps?

12. JavaScript objects are written with _____.

13. Which of the following values is not a Boolean false?

14. Arrays in JavaScript are defined by which of the following statements?

15. What will be the output of the following JavaScript code?

var quiz=[1,2,3];
var js=[6,7,8];
var result=quiz.concat(js);
document.writeln(result);