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| Section | Objectives |
|---|---|
| Topic 1: JavaScript Coding | - JavaScript ES6 Development
|
| Topic 2: Graphics and Animation | - Canvas and SVG
|
| Topic 3: Application Lifecycle Management | - Application Development Lifecycle
|
| Topic 4: Forms | - HTML5 Forms and Validation
|
| Topic 5: Layouts | - Responsive and Flexible Layouts
|
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NEW QUESTION # 46
The following output has more text than will fit in the element.
You need to apply CSS to contain the text inside the element ' s border without creating unneeded scrollbars or losing text. Which attribute setting should you use?
Answer: D
Explanation:
The correct setting is overflow: auto;. The CSS overflow property controls how content behaves when it does not fit inside an element's padding box. The requirement has three parts: keep the text inside the element's border, avoid unnecessary scrollbars, and avoid losing text. overflow: hidden clips overflowing content and does not provide a user-visible scrollbar, so text can become inaccessible. overflow: visible allows excess content to render outside the element's box, failing the containment requirement. overflow: scroll makes the element scrollable, but user agents display scrollbars whether or not content is actually overflowing, which violates the requirement to avoid unneeded scrollbars. MDN describes overflow: auto as clipping overflow content at the padding box while allowing it to be scrolled into view, with scrollbars displayed only when content is actually overflowing. This makes auto the precise choice for a controlled text container. References
/topics: CSS overflow, scroll containers, content clipping, layout flow, preserving overflowing content.
NEW QUESTION # 47
You have created custom error messages for a form. When a user attempts to submit the form with invalid data, the data must remain in the form and error messages must be displayed. Which Event property or method should you use?
Answer: B
Explanation:
The correct method is preventDefault(). During form submission, the browser's default behavior is to submit the form to the target URL, which may navigate away from the current page or reload it. If the submitted data is invalid and the application must display custom error messages while preserving the entered values, the submit event handler should call event.preventDefault(). This cancels the default submit action, allowing the page to remain in place and the script to display validation feedback next to the relevant form controls.
defaultPrevented is not the method to use; it is only a Boolean property that indicates whether preventDefault() has already been called. cancelable is also only informational; it tells whether the event's default behavior can be canceled. abort is unrelated to form validation and does not provide the required control over form submission. References/topics: HTML5 form validation, custom validation messages, submit event, event cancellation, preserving form data.
NEW QUESTION # 48
Which two functions support 2D transformations in CSS3? Choose 2.
Answer: B,E
Explanation:
The correct 2D transformation functions are matrix() and skew(). CSS transformations are applied through the transform property, which accepts transform functions that can move, rotate, scale, skew, or otherwise alter an element visually in two-dimensional or three-dimensional space. MDN describes the < transform-function > type as representing transformations that affect an element's appearance and can operate in 2D or 3D space.
The matrix() function is valid because it defines a homogeneous two-dimensional transformation matrix, allowing multiple transform effects to be represented in a single function. The skew() function is also valid because it distorts an element along the 2D plane. move() is not a CSS transform function; the standard movement function is translate(). scroll() is not a transform function; scrolling is controlled through overflow and scroll APIs. zoom() is not a CSS3 2D transform function. References/topics: CSS3 transforms, transform property, 2D transformation functions, matrix(), skew().
NEW QUESTION # 49
You need to correctly apply a style rule for screen devices with a width of 480 pixels or less.
Complete the code by selecting the correct option from the drop-down list.
Answer:
Explanation:
Explanation:
@media screen and (max-width: 480px) {
/* style rules go here */
}
The correct media query is @media screen and (max-width: 480px) {. The requirement says the style rule must apply to screen devices with a width of 480 pixels or less. In CSS media queries, screen identifies the media type, and (max-width: 480px) defines the upper viewport-width limit. This means the enclosed CSS rules apply when the viewport is 480 pixels wide or any smaller value, which is the standard mobile breakpoint behavior. @media screen and (width: 480px) is incorrect because it applies only when the viewport is exactly 480 pixels wide, not below it. @media screen display and (width: 480px) is invalid syntax because display is not used that way in a media query. @media screen-width: 480px is also invalid because it does not follow the required @media media-type and (feature: value) pattern. References/topics: responsive design, CSS media queries, @media, screen media type, max-width, mobile breakpoint styling.
NEW QUESTION # 50
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 # 51
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