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| Section | Objectives |
|---|---|
| HTML Fundamentals | - Document structure and semantics
|
| CSS Styling | - Selectors and styling rules
|
| JavaScript Programming | - DOM manipulation
|
| Web Application Development Concepts | - Client-side storage
|
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NEW QUESTION # 59
You create an interface for a touch-enabled application. Some input buttons do not trigger when tapped. What are two possible causes?
Answer: C,D
Explanation:
The correct causes are insufficient input target size and overlapping input areas. Touch interaction depends on hit testing: the browser or platform determines which element occupies the touched screen coordinate and dispatches the event to that element. If a button's active area is too small, the user's finger may visually appear to tap the button while the actual touch coordinate falls outside the actionable target. Microsoft's touch- target guidance recommends touch targets around 7.5 mm square, approximately 40 × 40 pixels on a 135 PPI display, to support reliable activation. Overlap is also a valid cause because one element can partially cover or compete with another during hit testing; W3C target-size guidance notes that overlapping areas should not be counted as usable target area unless the overlapping controls perform the same action. Event handlers are not the problem by themselves; they are the standard mechanism for detecting user input. "Touch screen not initialized" is not a normal HTML5 application-level cause. References/topics: touch input, event handling, hit testing, target size, overlapping controls.
NEW QUESTION # 60
You are creating the styling for your webpage. Which two CSS attributes produce a scroll bar if your content overflows its element? Choose 2.
Answer: B,C
Explanation:
The correct values are scroll and auto. The CSS overflow property controls what happens when content is too large to fit inside an element's box. MDN describes overflow as setting the desired behavior when content does not fit inside the element's padding box. The value overflow: scroll creates a scroll container and displays scrollbars so overflowing content can be reached, even when the scrollbar may not be strictly needed in some rendering environments. The value overflow: auto also creates scrolling behavior when content overflows, but it is conditional: scrollbars appear only when the content exceeds the available box size. hidden is incorrect because it clips overflowing content and hides the excess rather than exposing it through a scrollbar. visible is also incorrect because it allows overflow to render outside the element box and does not create a scroll container. Therefore, when the question asks which settings produce a scrollbar if content overflows, the precise answers are scroll and auto. References/topics: CSS overflow, scroll containers, overflow clipping, automatic scrollbars, layout flow.
NEW QUESTION # 61
What is the effect of applying the CSS float: right property to an image?
Answer: D
Explanation:
The correct answer is A. Applying float: right to an image removes the image from the normal inline flow and moves it to the right side of its containing block. Inline content, such as text, is then allowed to flow around the floated image. Because the image is anchored on the right, available text space is primarily on the left side of the image, and the text can continue above, beside, and below the floated region according to the surrounding layout. This is the classic use case for floating images within article-style content, where text wraps around a visual element rather than forcing the image to occupy an entire line. Option B is incomplete because it omits the important left-side wrapping behavior. Option C describes the opposite direction: an image floated left with text appearing to its right. Option D also describes float: left, not float: right.
References/topics: CSS float, floated images, text wrapping, normal flow, content positioning.
NEW QUESTION # 62
Which value does the following JavaScript code fragment store in the variable num?
var num = localStorage.length;
Answer: C
Explanation:
The value stored in num is the number of key-value pairs currently stored in localStorage. The localStorage object implements the Web Storage Storage interface, which stores data as named string key/value entries for the current origin. Its length property is read-only and returns the number of data items stored in that Storage object, not the size of the stored data and not the remaining capacity. MDN's Storage reference explicitly defines length as returning the number of data items stored, and its example shows that after three items are added to localStorage, localStorage.length returns 3. Therefore, if the storage area contains five named entries, num receives 5; if it contains no entries, num receives 0. Option A is incorrect because available bytes are not exposed through length. Option B is unrelated to Web Storage. Option C is incorrect because browser storage quota or capacity is separate from the length property. References/topics: Web Storage API, localStorage, Storage.length, key-value storage, application state.
NEW QUESTION # 63
You are given the design for an app. The project manager asks you to outline the steps you must take to release and maintain the app.
Move each step from the list on the left to its correct sequence in the application lifecycle on the right.
Note: You will receive partial credit for each correct response.
Answer:
Explanation:
Explanation:
Determine requirements # Develop code # Test the app
#
Monitor performance # Deploy the app
The correct application lifecycle sequence begins with Determine requirements because the team must first define what the app must accomplish, who will use it, and which functional and technical expectations must be satisfied. Since the question states that the design is already provided, the next implementation step is Develop code, where the HTML, CSS, JavaScript, assets, APIs, and app logic are created according to the approved design and requirements. After development, the app must be validated through Test the app.
Testing confirms that the app works correctly, meets requirements, handles user input properly, and does not contain functional defects that would block release. Once testing is complete, the app can be released through Deploy the app, which publishes it to the target environment or makes it available to users. The final operational stage is Monitor performance, where the released app is observed, maintained, updated, and improved based on performance, reliability, defects, and user behavior. References/topics: application lifecycle management, requirements, development, testing, deployment, maintenance.
NEW QUESTION # 64
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