Free WGU Web Development Applications (KVO1) Practice Questions

Answer : D

A conditional expression in JavaScript is an expression that evaluates to a boolean value and controls the execution flow based on its result. The conditional (ternary) operator ? : is used for conditional expressions.

Example Analysis:

Option A:

var result = dataCount;

This is a simple assignment, not a conditional expression.

Option B:

var result = count++ > 10;

This is a comparison but not a complete conditional expression.

Option C:

var result = dataCount++ * 1000 == 3000000;

This is an arithmetic operation followed by a comparison but not a complete conditional expression.

Option D:

javascript

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var result = count >= 10 ? 'Done' : getResult();

This is a conditional (ternary) expression. If count is greater than or equal to 10, result will be 'Done', otherwise, it will call getResult().

MDN Web Docs - Conditional (ternary) operator

W3Schools - JavaScript Conditions

Answer : A

To call the sayHello method in the given JavaScript object, you need to use the object's name followed by the method name with parentheses.

Correct Method Call:

Given the object definition:

var obj = {

sayHello: function() {

alert('Hello');

}

};

To call the method sayHello on the object obj:

obj.sayHello();

Option A: Obj.sayHello; is incorrect syntax. The correct syntax is obj.sayHello();.

Option B: Window.sayHello(); is incorrect because the method is defined in the obj object, not the window object.

MDN Web Docs - Functions

W3Schools - JavaScript Objects

Answer : B

The given CSS configures properties that control the processing of animations directly in the browser.

CSS Animations: CSS animations are processed by the browser's rendering engine. The animations defined by CSS are handled client-side and do not require server-side processing.

Key Properties:

Answer : C

The action attribute in the <form> element specifies the URL where the form data should be sent for processing when the form is submitted.

Action Attribute: This attribute defines the endpoint that will handle the submitted form data.

Usage Example:

<form action='/submit-form' method='post'>

<input type='text' name='username'>

<input type='submit' value='Submit'>

</form>

Here, the form data is sent to the /submit-form URL when submitted.

MDN Web Docs on <form> action attribute

W3C HTML Specification on Forms

Answer : A

The type='range' attribute in an <input> element renders a slider control.

HTML Input Type range:

Purpose: The range type is used for input fields that should contain a value from a range of numbers.

Example:

Given the HTML:

<input id='range' name='range' type='range'>

This will render as a slider that the user can move to select a value within a range.

MDN Web Docs - <input type='range'>

W3Schools - HTML Input Range