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| Section | Objectives |
|---|---|
| Topic 1: Web Application Development Concepts | - Media and APIs
|
| Topic 2: HTML Fundamentals | - Document structure and semantics
|
| Topic 3: JavaScript Programming | - Core JavaScript concepts
|
| Topic 4: CSS Styling | - Layout and responsive design
|
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質問 # 21
Which value does the following JavaScript code fragment store in the variable num?
var num = localStorage.length;
正解：B
解説：
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.
質問 # 22
Review the images on the left.
Complete the statements by selecting the correct option from each drop-down list.
Note: You will receive partial credit for each correct selection.
正解：
解説：
Explanation:
First drop-down: flex boxes
Second drop-down: background-size
Third drop-down: cover
The correct layout mechanism is responsive flex boxes because the content changes from a vertical mobile arrangement to a wider multi-column layout as space becomes available. Flexbox supports this behavior naturally through flexible item sizing and wrapping, often without needing explicit media queries for every screen size. The header image must fill its visible header region on both mobile and desktop. The correct CSS property for controlling how a background image scales inside its container is background-size. The correct value is cover, because background-size: cover scales the image so that the entire container is covered while preserving the image's aspect ratio. This prevents distortion, although some cropping can occur when the image and container have different aspect ratios. contain would preserve the full image but may leave empty space. auto would use the image's intrinsic size and would not reliably fill the header area. background- attachment, background-clip, and background-repeat do not control image scaling.
質問 # 23
You create an interface for a touch-enabled application. Some input buttons do not trigger when tapped. What are two possible causes?
正解：A、C
質問 # 24
Which element should you use to rotate an SVG square?
正解：B
解説：
The correct element is animateTransform. In SVG, rotation is not produced by drawing a different shape; it is produced by applying a transformation to an existing graphical element, such as a < rect > representing a square. The < animateTransform > element is specifically designed to animate the transform attribute of a target SVG element, and its supported transformation types include translation, scaling, rotation, and skewing.
Therefore, to rotate a square, the square would normally be defined with a shape element such as < rect > , and an < animateTransform > child or associated animation would specify attributeName= " transform " and type= " rotate " . animateMotion is incorrect because it moves an element along a motion path rather than rotating the element itself. circle is a shape element, not an animation mechanism. path defines arbitrary vector geometry, but it does not by itself animate or rotate another object. References/topics: SVG graphics, SVG transformations, animation elements, transform attribute, rotation animation.
質問 # 25
You write the following markup to create a page. Line numbers are included for reference only.
01 < !DOCTYPE html >
02 < html >
03 < head >
04 < style >
05
10 < /style >
11 < /head >
12 < body >
13 < svg height= " 500 " width= " 500 " >
14 < defs >
15 < filter id= " f2 " x= " 0 " y= " 0 " width= " 200% " height= " 200% " >
16 < feOffset result= " offOut " in= " SourceGraphic " dx= " 20 " dy= " 20 " / >
17 < feGaussianBlur result= " blurOut " in= " offOut " stdDeviation= " 10 " / >
18 < feBlend in= " SourceGraphic " in2= " blurOut " mode= " normal " / >
19 < /filter >
20 < /defs >
21 < text x= " 10 " y= " 100 " style= " fill:red; " > Blur Me! < /text >
22 Sorry, your browser does not support inline SVG.
23 < /svg >
24 < /body >
25 < /html >
An SVG blur filter is defined in the markup on the left. You need to apply the SVG blur filter to the text element on the page.
Which CSS code should you insert at line 05?
正解：B
解説：
The correct CSS is option B because the SVG filter is declared inside < defs > with the identifier id= " f2 " .
To apply an SVG filter from CSS, the filter property must reference that filter by URL syntax using the filter' s ID selector: filter: url( " #f2 " );. The text selector targets the SVG < text > element, so the rule applies the defined filter effect to the visible text content, Blur Me!. The filter itself uses < feOffset > , < feGaussianBlur
> , and < feBlend > to create the blurred visual effect. Option A is incorrect because filter: #blur; is not valid filter-reference syntax and does not match the actual filter ID. Option C is incorrect because fill controls paint color, not filter application, and blur is not a valid fill value. Option D uses url(blur), which does not reference the defined f2 filter and omits the required ID reference. References/topics: SVG filters, < filter > , filter IDs, CSS filter: url(#id), SVG < text > styling.
質問 # 26
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IT SpecialistのINF-306認定試験に受かるのはあなたの技能を検証することだけでなく、あなたの専門知識を証明できて、上司は無駄にあなたを雇うことはしないことの証明書です。当面、IT業界でIT SpecialistのINF-306認定試験の信頼できるソースが必要です。MogiExamはとても良い選択で、INF-306の試験を最も短い時間に縮められますから、あなたの費用とエネルギーを節約することができます。それに、あなたに美しい未来を作ることに助けを差し上げられます。
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