Which of the following types does NOT exist in javascript?

What's the output? 1 + 5 + ' bottles of milk';

Which fact is true about the keyword 'default'?

What does null, undefined, 'string', 20, true and false have in common?

var x = Math.ceil(10.126); What is the value of x?

Does NaN equal itself?

Objects are also called ____.

In order to make a window the active window, you use the ____ method of the window object.

For javascript external files the mime type is ____

Each piece of data contained in an array is called a(n) ____.

An infinite loop is an example of a(n) ____ error.