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| Section | Weight | Objectives |
|---|---|---|
| Forms | 20% | - Input validation
|
| Graphics and Animation | 25% | - SVG graphics
|
| Layouts | 20% | - Responsive design
|
| Application Lifecycle Management | 20% | - Testing and debugging
|
| JavaScript Coding | 15% | - APIs and state management
|
It-Pruefung hat riesieges Expertenteam. Sie untersucht ständig nach ihren Kenntnissen und Erfahrungen die IT Specialist INF-306 (HTML5 Application Development) IT-Zertifizierungsprüfung in den letzten Jahren. Ihre Forschungsergebnisse sind nämlich die Produkte von It-Pruefung. Die Fragen und Antworten zur IT Specialist INF-306 Zertifizierungsprüfung von It-Pruefung sind den realen Fragen und Antworten sehr ähnlich. Sie können vielen helfen, ihren Traum zu verwirklichen. It-Pruefung verspricht, dass Sie die IT Specialist INF-306 (HTML5 Application Development) Prüfung erfolgreich zu bestehen. Sie können beruhigt It-Pruefung in Ihren Warenkorb schicken. Mit It-Pruefung könen Sie Ihren Wunsch sofort erfüllen.
27. Frage
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?
Antwort: C
Begründung:
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.
28. Frage
A local photographer asks you to add filters as shown to the images in their photo gallery so that the images are not recognizable until authorized users log in.
Example of original and filtered images:
* Original image: full-color flower image
* Filtered image: blurred grayscale image
Analyze the images on the left.
Construct a CSS selector that will apply the appropriate filters to the images to meet the requirements.
Complete the markup by moving the appropriate HTML tags from the list on the left to the correct locations on the right. You may use each HTML tag once, more than once, or not at all.
Note: There is more than one correct markup. You will receive credit for any correct markup completion.
Antwort:
Begründung:
Explanation:
First blank: img
Second blank: filter:
Third blank: grayscale(100%)
Fourth blank: blur(8px)
The correct CSS selector is img because the requirement applies the visual effect to gallery images. The correct property is filter:, not transform:, because CSS filters modify the rendered appearance of an element using image-processing effects such as blur, grayscale, opacity, brightness, contrast, and shadows. The filtered sample appears blurred and colorless, so the appropriate filter functions are grayscale(100%) and blur (8px). grayscale(100%) removes all color from the image, converting it to a black-and-white rendering. blur (8px) obscures visual details, making the image difficult to recognize until the protected or authorized state changes the styling. The filter keyword without a colon is not a valid CSS declaration in this context.
brightness(40%) and opacity(50%) could further obscure an image, but they are not required to reproduce the shown filtered result. The final declaration is therefore filter: grayscale(100%) blur(8px);.
29. Frage
You need to define a grid that meets the following requirements:
* Explicitly sets the width of 6 equal columns of 1 fraction
* Explicitly sets 5 varied sized rows
* Defines 15px of space between each grid column
* Defines 10px between each grid row
Complete the code by selecting the correct option from each drop-down list.
Antwort:
Begründung:
Explanation:
display: grid;
grid-template-columns: repeat(6, 1fr);
grid-template-rows: 50px 50px 150px 150px 100px;
grid-gap: 10px 15px;
The correct grid definition starts with display: grid;, which turns the element into a CSS Grid container. To explicitly create six equal-width columns, the correct property is grid-template-columns, and the most efficient value is repeat(6, 1fr). The repeat() function avoids writing 1fr six separate times, while 1fr assigns each column one equal fraction of the available grid width. The five row sizes must be explicitly declared with grid-template-rows, using the exact varied values shown: 50px 50px 150px 150px 100px. This creates five rows with fixed pixel heights. For the spacing requirement, grid-gap: 10px 15px; is the correct shorthand.
The first value controls the row gap, so rows are separated by 10px; the second value controls the column gap, so columns are separated by 15px. References/topics: CSS Grid containers, explicit grid tracks, grid-template- columns, grid-template-rows, repeat(), fractional units, grid gaps.
30. Frage
Which two code segments declare a JavaScript method? Choose 2.
Antwort: A,B
Begründung:
The correct selections are C and D because both declare a function as a property of an object, which is the defining characteristic of a JavaScript method. MDN describes a method as a function associated with an object, or more specifically, an object property whose value is a function. In option C, Score: function() { ... } is object-literal syntax. It defines a property named Score whose value is an executable function, so that property behaves as a method of the object. In option D, this.Score = function() { ... } assigns a function to the Score property of the current object instance. MDN notes that this is commonly used inside object methods to refer to the object the method is attached to. Option B does not declare a method; it calls Score() and assigns the return value. Option A is only an incomplete or ordinary variable declaration and does not create a function-valued object property. References/topics: JavaScript objects, custom classes, methods, function expressions, this.
31. Frage
You write the following JavaScript code. Line numbers are included for reference only.
01 < script >
02
03 beststudent = new Student( " David " , " Hamilton " );
04 document.write(beststudent.fullname + " is registered. " );
05 < /script >
You need to write a function that will initialize and encapsulate the member variable fullname.
Which code fragment could you insert at line 02 to achieve this goal?
Note: Each correct answer presents a complete solution.
Antwort: B
Begründung:
The correct answer is A because the code at line 03 creates an object by calling a constructor function with the new keyword. A constructor function must be declared with the same identifier used in the new Student( " David " , " Hamilton " ) expression. Inside the constructor, instance members should be assigned through this, because this refers to the newly created object. Option A correctly initializes this.firstname, this.lastname, and this.fullname, so beststudent.fullname is available at line 04 and evaluates to " David Hamilton " . Option B is invalid JavaScript syntax because var student(firstName, lastName) is not a valid function declaration. Option C is also invalid syntax for the same reason: var Student(firstname, lastname) cannot declare a constructor.
Option D uses a valid function declaration, but it assigns firstname, lastname, and fullname without this, which creates or references non-encapsulated variables rather than properties of the constructed object.
References/topics: JavaScript constructor functions, new keyword, object instance properties, this, custom classes.
32. Frage
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