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Which code segment contains a conditional expression?
A)
B)
C)
D)
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
Copy code
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
Given the following javaScript code:
Which code segment calls the method?
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
Given the following CSS:
What is being configured?
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:
Which HTML5 attribute specifies where to send the form data for processing a form is submitted?
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
Given the following markup and no style sheet:
Which control does the input element render?
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
