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| Section | Objectives |
|---|---|
| Application Lifecycle Management | - Application Development Lifecycle
|
| Layouts | - Responsive and Flexible Layouts
|
| JavaScript Coding | - JavaScript ES6 Development
|
| Graphics and Animation | - Canvas and SVG
|
| Forms | - HTML5 Forms and Validation
|
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NEW QUESTION # 60
Which two functions support 2D transformations in CSS3? Choose 2.
Answer: A,C
Explanation:
The correct transformation functions are matrix() and skew(). CSS transformations are applied with the transform property and accept transform functions that alter an element's rendered appearance in two- dimensional or three-dimensional space. MDN defines < transform-function > as a data type representing a transformation that can rotate, resize, distort, or move an element in 2D or 3D space. The matrix() function is valid because it defines a homogeneous two-dimensional transformation matrix, allowing translation, scaling, rotation, and skewing effects to be represented numerically in one function. The skew() function is also valid because it explicitly skews an element on the 2D plane. scroll() is not a CSS transform function; scrolling is handled through overflow behavior or scrolling APIs. move() is also not a valid CSS transform function; the standard transform function for movement is translate(). References/topics: CSS3 transforms, transform property, 2D transformation functions, matrix(), skew().
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NEW QUESTION # 61
Review the markup segment. Which entry will validate successfully according to the required pattern?
Answer: B
Explanation:
The valid entry is A, assuming the OCR-corrupted option represents the intended secret-code format: four letters, a hyphen, two digits, a hyphen, four digits, a hyphen, and four letters. The HTML pattern attribute defines a regular expression that an input value must satisfy during constraint validation. MDN specifies that pattern is used to define a regular expression the input value must match. In the intended pattern, the first group must contain exactly four alphabetic characters, the second group exactly two numeric digits, the third group exactly four numeric digits, and the final group exactly four alphabetic characters. Option A satisfies that structure: kukX is four letters, 04 is two digits, 4938 is four digits, and WJDF is four letters. Option B fails because the final group Uhj6 contains a digit. Option C fails because the first group includes a digit and the digit grouping/hyphen structure is wrong. Option D fails because 23h contains a letter where only digits are allowed. References/topics: HTML5 form validation, pattern attribute, regular-expression validation, text input constraints.
NEW QUESTION # 62
You are creating a form that asks a user to enter their phone number. The form must be submitted only if the phone number field is not empty and matches the format 111-444-7777. Which markup should you use?
Answer: D
Explanation:
The correct markup is option D. The type= " tel " input type is appropriate for telephone-number entry, but it does not automatically validate a specific telephone-number format because phone formats vary internationally. MDN notes that tel inputs allow telephone entry but are not automatically validated to a particular format. Therefore, a pattern attribute is required to enforce the exact structure. The regular expression [0-9]{3}-[0-9] {3}-[0-9]{4} requires three digits, a hyphen, three digits, another hyphen, and four digits, matching the requested format such as 111-444-7777. MDN defines the pattern attribute as a regular expression the input value must match for constraint validation. The required attribute is also necessary because the field must not be empty; MDN states that required indicates the user must specify a value before the form can be submitted. Option A only limits length. Option B lacks hyphen validation and required.
Option C hard-codes only specific digits. References/topics: HTML5 validation, tel, pattern, required, regular expressions.
NEW QUESTION # 63
A form has four buttons with a class of item. You need to apply an event listener to all buttons to invoke the moveElement function when a button is pressed. Your code must ensure bubble capture.
Complete the markup by selecting the correct option from each drop-down list.
Note: You will receive partial credit for each correct selection.
Answer:
Explanation:
Explanation:
First drop-down: " click " ,
Second drop-down: moveElement,
Third drop-down: false,
The correct event listener syntax is addEventListener(type, listener, useCapture). The first argument must be " click " because the function must run when a button is pressed. The second argument must be moveElement, not moveElement(), because the event listener expects a function reference. Using parentheses would call the function immediately while the page is loading instead of waiting for the user to press a button. The third argument controls the event phase. false means the listener runs during the bubbling phase, which is the normal behavior for button click handling. true would register the listener for the capturing phase instead.
Since the code uses document.querySelectorAll( " .item " ), it selects all elements with the class item. The for loop then attaches the same click listener to each selected button individually. This ensures that all four buttons invoke moveElement when clicked.
NEW QUESTION # 64
Which two code segments declare a JavaScript method? Choose 2.
Answer: B,D
Explanation:
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.
NEW QUESTION # 65
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