In how many modes can the Closure Compiler be run?

What does the nodeName of the nodeType Document return?

 Which of the following is the Navigator object method? 

What is the output of the following JavaScript code?

var x = 15 + 2 + '4' + 3;

window.alert(x);

The inner frame within a top-level window can be referred to as _____________

How do you add elements to a JavaScript Set object?

  What will be the return value of the write() method when the Node cannot write the data immediately and has to buffer it internally? 

 When is the mouseout event fired? 

What will be the output of the following code?

function a(num1, num2) {

var num3 = num1 + num2;

document.write(num3);

}

a(10, 20);

What is the purpose of synthetic events in React?