Which of the following code snippets will trigger an input type="file" attribute when an element with a "newbtn" ID is clicked? <button id"newbtn" onclick="grt();">Upload</button> <form> <input id="thisId" type="file" name="upload" /> </form> </form>

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

Difference between call() and apply()?

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

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 will correctly check if a variable is undefined in JavaScript?

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

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

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

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();

What's the output? s2 = new String('2 + 2') document.write(eval(s2));