Question 1

JavaScript allows you to create __________, which are values that are stored and that you can access with a name that you specify.
A) events
B) variables
C) event listeners
D) statements

Accepted Answer

Variables in JavaScript allow you to store values and access them using a specified name. Events, event listeners, and statements are all different concepts in JavaScript that serve different purposes.

Question 2

The statement that creates a variable starts with the keyword __________.
A) function
B) var
C) variable
D) create

Accepted Answer

The keyword "var" is used to create a variable in JavaScript.

Question 3

The punctuation for a function is similar to that of a CSS style rule: an opening ____ goes at the beginning.
A) curly brace ({)
B) bracket ([)
C) quotation mark (")
D) pound sign (#)

Accepted Answer

In JavaScript, a function is defined using the function keyword followed by parentheses and a curly brace. The opening curly brace signifies the beginning of the function block and is similar to the opening curly brace used in CSS style rules.

Question 4

Multi-line comments in JavaScript use the same format as __________ comments.
A) WebVTT
B) XHTML
C) CSS
D) HTML

Accepted Answer

Multi-line comments in JavaScript use the same format as CSS comments, which are enclosed within /* and */.

Question 5

You can access any HTML element by specifying a CSS selector using the ____ method.
A) querySelector()
B) addEventListener()
C) checkValidity()
D) write()

Accepted Answer

The querySelector() method allows you to access any HTML element by specifying a CSS selector. This is the most appropriate choice for this task. The other options listed (addEventListener(), checkValidity(), and write()) are not directly related to accessing HTML elements.

Question 6

Every JavaScript statement ends with a(n) __________.
A) colon ( : )
B) period ( . )
C) semicolon ( ; )
D) comma ( , )

Accepted Answer

Every JavaScript statement must end with a semicolon (;). This tells the interpreter that the current statement has ended and the next statement can begin. While some statements may still function without a semicolon, it is considered best practice to include one to avoid potential errors or confusion.

Question 7

The ____ event occurs when a user moves the mouse pointer over an element or touches an element.
A) submit
B) mouseover
C) mouseout
D) load

Accepted Answer

The mouseover event occurs when a user moves the mouse pointer over an element or touches an element.Web developers often use this event to add interactivity to web pages, such as displaying additional information or changing the appearance of the element when the mouse pointer is over it.

Question 8

You specify a CSS selector in __________ within the parentheses of the querySelector() method to reference an object.
A) square brackets ( [ ] )
B) curly braces ( { } )
C) angle brackets ( < > )
D) quotes ( " " )

Accepted Answer

The querySelector() method in JavaScript requires the CSS selector to be specified as a string, which is enclosed in quotes (" ").

Question 9

The __________, which is part of the developer tools in a modern web browser, can be used to enter test code and view error message related to JavaScript.
A) address bar
B) bookmarks list
C) console
D) emulator

Accepted Answer

The console is the tool used for debugging JavaScript code and viewing error messages in a modern web browser's developer tools. The address bar is used for navigating to different URLs, the bookmarks list is for saving frequently visited URLs, and an emulator is a tool used for testing applications on various devices and operating systems.

Question 10

Developers can write JavaScript that responds to actions, known as __________, which include many actions commonly performed on a web page.
A) methods
B) activities
C) events
D) statements

Accepted Answer

The term used for actions in JavaScript that trigger responses is events. These events include many actions performed on a web page, such as clicking a button, hovering over an element, or scrolling down a page. Methods, activities, and statements are all also important parts of JavaScript, but they do not specifically refer to actions that trigger responses.

Question 11

The ____ event occurs when a user clicks or touches an element.
A) click
B) submit
C) focus
D) load

Accepted Answer

The click event occurs when a user interacts with an element by clicking or tapping on it. It is one of the most commonly used events in web development.

Question 12

Whenever you use a method, you specify its parent object first, followed by a(n) __________ and then the method name.
A) period
B) comma
C) semicolon
D) hyphen

Accepted Answer

When using a method in most programming languages, you would specify the parent object first, followed by a period (also known as a dot), and then the method name. This is known as the dot notation and is used to indicate that the method belongs to the parent object.

Question 13

A(n) __________ is a JavaScript instruction that performs an action.
A) function
B) event
C) statement
D) operator

Accepted Answer

A statement in JavaScript is a complete line of code that performs an action or executes a command. Examples of JavaScript statements include variable declarations, loops, conditional statements, function calls, and more.

Question 14

Standard ____ for objects include the text content associated with an object, the name of the object, and the name of an associated attribute.
A) properties
B) statements
C) attributes
D) values

Accepted Answer

Properties are the characteristics or attributes associated with an object. The text content, name of the object, and name of an associated attribute are all examples of properties. Statements refer to executable code, while values are the data assigned to a property or attribute.

Question 15

The __________ property refers to the current value of a form field or an object property.
A) classValue
B) src
C) textContent
D) value

Accepted Answer

The "value" property refers to the currently selected or entered value of a form field or an object property. For example, the value property of a text input field would display the currently typed text, and the value property of a checkbox field would display whether it is checked or not.

Question 16

The DOM defines ____, which are actions that are associated with an object.
A) modes
B) methods
C) events
D) activities

Accepted Answer

Methods are actions that can be performed on objects in the DOM.

Question 17

Writing code to look up and change data associated with parts of HTML documents requires a standardized way of referring to the parts of a Web page; this system is known as the Document _________ Model.
A) Element
B) Object
C) Property
D) Method

Accepted Answer

The correct term is the Document Object Model (DOM), which is a cross-platform and language-independent interface that treats an XML or HTML document as a tree structure wherein each node is an object representing a part of the document.

Question 18

The first line of a function begins with the word function, followed by its name and a pair of ____.
A) quotation marks
B) parentheses
C) equal signs
D) exclamation marks

Accepted Answer

The first line of a function begins with the keyword "function" followed by its name and a pair of parentheses that may or may not contain parameters.

Question 19

The __________ object is the parent element of the DOM tree.
A) Document
B) Element
C) Head
D) Body

Accepted Answer

The Document object is the top-level parent element of the DOM tree. It represents the entire HTML page and contains all other objects, such as the Head and Body objects.

Question 20

To assign a new property value, you use the assignment operator, which is simply a(n) __________.
A) equal sign ( = )
B) plus sign ( + )
C) less-than sign ( < )
D) greater-than sign ( > )

Accepted Answer

The assignment operator used to assign a new property value is the equal sign (=).

Quiz 13: Programming Web Pages With Javascript

JavaScript allows you to create __________, which are values that are stored and that you can access with a name that you specify.

The statement that creates a variable starts with the keyword __________.

The punctuation for a function is similar to that of a CSS style rule: an opening ____ goes at the beginning.

Multi-line comments in JavaScript use the same format as __________ comments.

You can access any HTML element by specifying a CSS selector using the ____ method.

Every JavaScript statement ends with a(n) __________.

The ____ event occurs when a user moves the mouse pointer over an element or touches an element.

You specify a CSS selector in __________ within the parentheses of the querySelector() method to reference an object.

The __________, which is part of the developer tools in a modern web browser, can be used to enter test code and view error message related to JavaScript.

Developers can write JavaScript that responds to actions, known as __________, which include many actions commonly performed on a web page.

The ____ event occurs when a user clicks or touches an element.

Whenever you use a method, you specify its parent object first, followed by a(n) __________ and then the method name.

A(n) __________ is a JavaScript instruction that performs an action.

Standard ____ for objects include the text content associated with an object, the name of the object, and the name of an associated attribute.

The __________ property refers to the current value of a form field or an object property.

The DOM defines ____, which are actions that are associated with an object.

Writing code to look up and change data associated with parts of HTML documents requires a standardized way of referring to the parts of a Web page; this system is known as the Document _________ Model.

The first line of a function begins with the word function, followed by its name and a pair of ____.

The __________ object is the parent element of the DOM tree.

To assign a new property value, you use the assignment operator, which is simply a(n) __________.