How many read-only attributes are present in the Navigator object?

What will be the output of the following JavaScript code?

var A = new F();

a.constructor === F

What is the lifetime of the data stored through localStorage?

What is the output of the following code?

<script>

var x = 4;

document.write(typeof(x.toExponential(4)));

</script>

What does the pop() method do in an array?

Which of the following functions reads the textual contents of a URL and returns it as a string?

 What is the code to start displaying the time when the document loads? 

Predict the output:

var o = {f: function() { return this.a + this.b; }};
var p = Object.create(o);
p.a = 4;
p.b = 8;

console.log(p.f());

Which of the following statements about JavaScript is correct?

The meaning of Augmenting classes is that: