What will be the output of the following code snippet?

var str = /u/.exec("I am the best friend!");
console.log(str);

What's the output? var test = function test(){ console.log('2' - - '2'); }; test();

Which are invalid usage(s) for a web worker in JavaScript? 1. Making use of the window shortcut to get the current global scope in a web worker. 2. Trying to access data in DOM directly with a web worker.

What's the output? var test = function test(){ console.log(window.location === document.location); }; test();

What's the output? var a = /xy/i, b = new RegExp(a, 'g'); console.log(a.test('xy')); console.log(b.test('xy')); console.log(a.test('XY')); console.log(b.test('XY'));

What's the output? var x=1; function f(x) { if (x === 0) { return 1; } return x * f(x-1)+2; } console.log(f(8));

Which are not valid HTML events?

The following functions are for encoding URL parameters in Javascript. Which function escape converts non-ASCII characters into its Unicode escape sequences, like %uxxx?

Which can be used to write a JavaScript function that will accept user input?

Given a p element with some text content, which of the following code snippets sets the background color of the text to yellow, its color to red, and its font size to 20px?

Which shortcut can be used for writing multiple document.write statements?