Is the following JavaScript script valid?

Advantages of Flux are:

Which method of the Location object makes the window load and display the document at the URL specified?

Which React hook accepts a context object and returns the current context value for that context?

Find the output of the following code:

<script>

var x = 83;

var y = "false";

document.write(83 * Number(y));

</script>

What is Microsoft's proprietary client-side storage mechanism in Internet Explorer?

Which method is used to apply the accordion widget on the HTML element?

Which two functions are not allowed in any secure JavaScript subset?

Predict the output:

function sum() {
 return this.a + this.b + this.c;
}

var o = {
 a: 1,
 b: 2,
 c: 3,
 get average() {
   return (this.a + this.b + this.c) / 3;
 }
};

Object.defineProperty(o, 'sum', {
   get: sum, enumerable: true, configurable: true});

console.log(o.average, o.sum);

Statement 1: getElementByClassName returns a collection of elements (as an array) in the document matching the specified class name.

Statement 2: getElementById and getElementsByTagName also operate in a similar manner.