WGU C777 – Web Development Applications 2 02 6 Multiple-Choice Questions with Rationales Versions 4 High-Yield Focus

WGU C777 – Web Development
Applications 2026 Multiple-Choice
Questions with Rationales Versions 4
High-Yield Focus


TABLE OF CONTENTS
1.HTML & HTML5 (Questions 1–50)
2.CSS & CSS3 (Questions 51–100)
3.JavaScript Fundamentals (Questions 101–140)
4.JavaScript DOM Manipulation & Events (Questions 141–170)
5.JavaScript ES6+ Features (Questions 171–200)
6.APIs, AJAX, Fetch, JSON (Questions 201–230)
7.Web Performance, Security, Accessibility, Responsive
Design (Questions 231–260)



HTML & HTML5 (Questions 1–50)
Question 1
Which HTML element is used to define a piece of self-contained content
that could be distributed or reused independently?
A. <section>
B. <div>
C. <article>
D. <span>

,Correct Answer: C
Rationale: <article> represents self-contained content (e.g., forum post,
magazine article). <section> (A) groups related content but is not
necessarily independent.


Question 2 (Select all that apply)
Which of the following are valid HTML5 elements for structuring a
webpage layout? (Select all that apply)
A. <header>
B. <footer>
C. <sidebar>
D. <main>
E. <nav>
Correct Answers: A, B, D, E
Rationale: <sidebar> (C) is not a standard HTML5 element
(use <aside> instead). The others are standard structural elements.


Question 3
What is the correct HTML5 element for playing audio files?
A. <sound>
B. <audio>
C. <mp3>
D. <media>
Correct Answer: B
Rationale: <audio> is the standard HTML5 element for embedding
sound files. <source> can specify multiple formats.


Question 4
Which attribute of the <audio> element makes it play repeatedly?

,A. repeat
B. loop
C. autoplay
D. controls
Correct Answer: B
Rationale: The loop attribute causes the audio to repeat
continuously. autoplay (C) starts playback automatically.


Question 5
Which input type creates a date picker in HTML5?
A. <input type="date">
B. <input type="datetime">
C. <input type="calendar">
D. <input type="pickdate">
Correct Answer: A
Rationale: type="date" provides a date picker. datetime (B) is obsolete
(use datetime-local instead).


Question 6 (Select all that apply)
Which of the following are valid HTML5 input types? (Select all that
apply)
A. search
B. url
C. time
D. week
E. month
Correct Answers: A, B, C, D, E
Rationale: All are valid HTML5 input types. search is for search
boxes; url validates URL format; time, week, and month are date/time
pickers.

, Question 7
What is the purpose of the <fieldset> element in HTML5?
A. Groups related form controls together and draws a box around them
B. Creates a field for user input
C. Defines a field for file upload
D. Creates a legend for a form
Correct Answer: A
Rationale: <fieldset> groups form controls. <legend> (B) provides the
caption. File upload (C) is <input type="file">.


Question 8
What does the <legend> element do?
A. Provides a caption for a <fieldset>
B. Creates a legend on a map
C. Provides a caption for a table
D. Creates a list of items
Correct Answer: A
Rationale: <legend> is used as the first child of <fieldset> to provide a
group label.


Question 9 (Select all that apply)
Which of the following are valid attributes for the <textarea> element?
(Select all that apply)
A. rows
B. cols
C. maxlength
D. wrap
E. placeholder