What is the output of the following JavaScript code?

s2 = new String("2 + 2")
document.write(eval(s2));

What's the output? var main = function() { var i=2,j=0,k=0,m=1.5,s=0; while(i<=3) { j=1; while(j<=4) { k=1; while(k<=4) { if(k%2!==0) { s=s+i+j+m; k++; } else { k++; m++; } } j=j+2; m++; } i++; m++; } console.log(s); } main();

function test(){ return { test:1 }; } alert(typeof test()); What will be the above alert ?

Which result is returned by the JavaScript operator 'typeof' for the keyword 'null'?

Which method is used to add and/or remove elements from an array and modify them in place?

Which function of the Object constructor with regard to JavaScript 1.8 returns the array of names of only enumerable properties of the given object?

Final value of the variable bar in the following code? var foo = 9; bar = 5; (function() { var foo = 2; bar= 1; }()) bar = bar + foo;

Which is a good reason why JavaScript variables would start with a dollar sign ($)?

Difference between call() and apply()?

Which are true regarding JavaScript and multi-threading/concurrency?

Which code snippet will trigger an input type='file' attribute when an element with a 'newbtn' ID is clicked? Upload