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NEW QUESTION # 35
Given the following code:
What does the console display as output?
Answer: A
Explanation:
Given the code segment:
var a = "8";
var b = "6";
var c = a + b;
console.log(c);
This code concatenates two strings.
* Explanation:
* var a = "8";: Variable a is assigned the string "8".
* var b = "6";: Variable b is assigned the string "6".
* var c = a + b;: The + operator concatenates the two strings, resulting in "86".
* console.log(c);: Outputs the value of c to the console.
* Output:
* The console displays "86" because it concatenates the two string values.
* References:
* MDN Web Docs - String
* W3Schools - JavaScript String
NEW QUESTION # 36
What allows a scripting language to manipulate elements on a web page?
Answer: C
Explanation:
The Document Object Model (DOM) is an API for HTML and XML documents that defines the logical structure of documents and the way a document is accessed and manipulated.
* DOM Explanation:
* The DOM represents the page so that programs can change the document structure, style, and content.
* It provides a way for scripts to update the content, structure, and style of a document while it is being viewed.
* Explanation:
* Option A: CSS is incorrect because it is used for styling web pages.
* Option B: XML is incorrect because it is a markup language, not an API for manipulating web page elements.
* Option C: HTML is incorrect because it is the markup language used to create web pages, not an API for manipulation.
* Option D: DOM is correct because it allows a scripting language to manipulate elements on a web page.
* References:
* MDN Web Docs - DOM
* W3Schools - JavaScript HTML DOM
NEW QUESTION # 37
Which code segment creates a slider field that accepts a numeric value ranging from 1 through 10?
Answer: B
Explanation:
To create a slider field that accepts a numeric value ranging from 1 through 10, the input element with type=" range" should be used. The min and max attributes define the range of acceptable values.
* HTML Input Type range:
* Purpose: The range type is used for input fields that should contain a value from a specified range.
* Attributes:
* type="range": Specifies that the input field should be a slider.
* min="1": Sets the minimum acceptable value.
* max="10": Sets the maximum acceptable value.
* Example:
* Given the HTML:
<input type="range" name="sat-level" min="1" max="10">
* Options Analysis:
* Option A:
<input type="number" name="sat-level" max="10">
* This creates a numeric input field, not a slider.
* Option B:
<input type="range" name="sat-level" min="1" max="10">
* This is the correct option that creates a slider field with the specified range.
* Option C:
<input type="number" name="sat-level" min="1" max="10">
* This creates a numeric input field, not a slider.
* Option D:
<input type="range" name="sat-level" max="10">
* This creates a slider but lacks the min attribute, so it doesn't fully meet the requirement.
* References:
* MDN Web Docs - <input type="range">
* W3Schools - HTML Input Range
By using the correct attributes, the slider field will allow users to select a value between 1 and 10.
NEW QUESTION # 38
Given the following code:
Var a = ''true'';
What is the data type of d?
Answer: D
Explanation:
The data type of the variable a is determined by the value assigned to it. In JavaScript, if a value is enclosed in double or single quotes, it is treated as a string.
* Variable Assignment:
* Given the code:
var a = "true";
* The value "true" is enclosed in double quotes, making it a string.
* Explanation:
* Option A: Boolean is incorrect because the value "true" is a string, not a boolean.
* Option B: String is correct because the value is enclosed in double quotes.
* Option C: Object is incorrect because the value is a primitive string.
* Option D: Undefined is incorrect because the variable a is assigned a value.
* References:
* MDN Web Docs - JavaScript Data Types
* W3Schools - JavaScript Data Types
NEW QUESTION # 39
What is the default behavior of overlay elements?
Answer: D
Explanation:
In CSS, when elements overlap, the default behavior is that the last element listed in the HTML document appears on top.
* Stacking Context:
* Default Behavior: Elements are stacked in the order they appear in the HTML. The last element in the document tree is rendered on top.
* z-index: You can control stacking order using the z-index property, but without it, the default order applies.
* Example:
* Given HTML:
<div style="position: absolute; width: 100px; height: 100px; background-color: red;"></div>
<div style="position: absolute; width: 100px; height: 100px; background-color: blue;"></div>
* The blue div will be on top of the red div because it appears later in the HTML document.
* References:
* MDN Web Docs - Stacking context
* W3C CSS Positioned Layout Module Level 3
By understanding these fundamental CSS concepts, developers can create more effective and visually appealing web layouts.
NEW QUESTION # 40
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