What will the code below output to the console and why? (function(){ var a = b = 3; })(); console.log("a defined? " + (typeof a !== 'undefined')); console.log("b defined? " + (typeof b !== 'undefined'));

What the problem with the code ? function runner() { this.run = function() {} }; var runnerCollection = new Array(); for(var i = 0 ; i < 1000 ; i ++) { runnerCollection.push(new runner()); }

What does Date() for example return ?

What's the output? console.log({} + {});

function base(callback){ callback.call({msg:'hi'}) } function message(){ alert(this.msg) }; base(message); which is the value of alert?

Choose correct answer: 'If you delete an object prototype property, it will..........'

var p = {'p1': 'value1', 'p2': 'value2', 'p3': 'value3' }; Which produces the following output? output: p2 = value2

Correct syntax for using the JavaScript exec() object method?

Which code snippet removes objects from an associative array?

Which one shows the correct result for the code below? var arr = []; arr[0] = 'Jani'; arr[1] = 'Hege'; arr[2] = 'Stale'; arr[3] = 'Kai Jim'; arr[4] = 'Borge'; console.log(arr.join()); arr.splice(2, 0, 'Lene'); console.log(arr.join());

Which will invoke the browser's Add To Favorite dialog box?