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Quiz by Sanny Lin, created more than 1 year ago

Quiz on 3) JavaScript - Advanced Topics (Checkpoints 18-21), created by Sanny Lin on 03/24/2016.

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	Created by Sanny Lin over 10 years ago

4944503

quiz

2016-04-22T00:32:30Z

3) JavaScript - Advanced Topics (Checkpoints 18-21)

Each question in this quiz is timed.

Begin Quiz

Question 1 of 6

Which of these is an object constructor?

Select one of the following:

function Bunny(type) {
this.type = type;
}
var Bunny = {type: ""chocolate""};
Bunny.create();
Object.create(Bunny);

Explanation

Question 2 of 6

function Star() { // function body };
var andromeda = new Star();

How might you visually depict the prototype chain of `andromeda`?

Select one of the following:

andromeda --> Star.prototype --> Object.prototype --> null
andromeda --> Star --> Function.prototype --> Object.prototype --> null
andromeda --> Star.prototype -> Function.prototype --> Object.prototype --> null
andromeda --> Star --> Object.prototype --> null

Explanation

Question 3 of 6

var numbers = [4, 84, 9, 7, 33];
numbers.length; // returns 5
numbers.length = 4;

Given the code above, what will `numbers.length` return?

Select one of the following:

4
5
undefined
null

Explanation

Question 4 of 6

x = ["y", "z"];
console.log(typeof x);

What prints to the console?

Select one of the following:

"object"
"array"
null
undefined

Explanation

Question 5 of 6

var myString = "This is a string!";
myString.length;

True or false: In this example, `length` is an own property on `myString`.

Select one of the following:

True
False

Explanation

Question 6 of 6

var protoFrog = { // some properties };
var greenFrog = Object.create(protoFrog);

How might you visually depict the prototype chain of `greenFrog`?

Select one of the following:

greenFrog --> protoFrog --> Object.prototype --> null
greenFrog --> protoFrog.prototype --> Object.prototype --> null
greenFrog --> Object.prototype --> null
none of these

Explanation

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4944503

quiz

2016-04-22T00:32:30Z

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Quiz on 3) JavaScript - Advanced Topics (Checkpoints 18-21), created by Sanny Lin on 03/24/2016.

3) JavaScript - Advanced Topics (Checkpoints 18-21)

Question 1 of 6

Which of these is an object constructor?

Select one of the following:

Explanation

Question 2 of 6

function Star() { // function body }; var andromeda = new Star(); How might you visually depict the prototype chain of `andromeda`?

Select one of the following:

Explanation

Question 3 of 6

var numbers = [4, 84, 9, 7, 33]; numbers.length; // returns 5 numbers.length = 4; Given the code above, what will `numbers.length` return?

Select one of the following:

Explanation

Question 4 of 6

x = ["y", "z"]; console.log(typeof x); What prints to the console?

Select one of the following:

Explanation

Question 5 of 6

var myString = "This is a string!"; myString.length; True or false: In this example, `length` is an own property on `myString`.

Select one of the following:

Explanation

Question 6 of 6

var protoFrog = { // some properties }; var greenFrog = Object.create(protoFrog); How might you visually depict the prototype chain of `greenFrog`?

Select one of the following:

Explanation

function Star() { // function body };
var andromeda = new Star();

How might you visually depict the prototype chain of `andromeda`?

var numbers = [4, 84, 9, 7, 33];
numbers.length; // returns 5
numbers.length = 4;

Given the code above, what will `numbers.length` return?

x = ["y", "z"];
console.log(typeof x);

What prints to the console?

var myString = "This is a string!";
myString.length;

True or false: In this example, `length` is an own property on `myString`.

var protoFrog = { // some properties };
var greenFrog = Object.create(protoFrog);

How might you visually depict the prototype chain of `greenFrog`?