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Question ID 14831

You are styling a box object on a page by using CSS3.
You need to set the transparency of the object to 50%.
Which two CSS3 styles will achieve the goal? (Each correct answer presents a complete
solution. Choose two.)

 

Option A

Option A

Option B

Option B

Option C

Option C

Option D

Option D

Correct Answer B,C
Explanation Explanation: The RGBA declaration allows you to set opacity (via the Alpha channel) as part of the color value. Example: div { background-color: rgba(255,0,0,0.5); } The background color has been set to blue, and the opacity set to half. Example 2: background-color: rgb(0,0,255); opacity: 0.5; The background color has been set to blue, and the opacity set to half. Reference: A brief introduction to Opacity and RGBA http://www.css3.info/introduction-opacity-rgba/


Question ID 14833

You are creating a function by using JavaScript. The function accepts an object as the
parameter and returns a string that identifies the data type of the object.
You have the following requirements:
✑ The function must return "Number" if the object is a number.
✑ The function must return "String" if the object is a string.
✑ The function must return "Unknown" if the object is neither a number nor a string.
You need to implement the function to meet the requirements.
How should you build the code segment? (To answer, select the appropriate options from
the drop-down lists in the answer area.)

Option A

Answer :

Explanation:

* Use the switch statement to select one of many blocks of code to be executed. Syntax switch(expression) { case n: code block break; case n: code block break; default: default code block } This is how it works: The switch expression is evaluated once. The value of the expression is compared with the values of each case. If there is a match, the associated block of code is executed. * Object.prototype.constructor Returns a reference to the Object function that created the instance's prototype. Note that the value of this property is a reference to the function itself, not a string containing the function's name. The value is only read-only for primitive values such as 1, true and "test". * Description All objects inherit a constructor property from their prototype: var o = {}; o.constructor === Object; // true var a = []; a.constructor === Array; // true var n = new Number(3); n.constructor === Number; // true * The constructor property is created together with the function as a single property of func.prototype.

 

 

Correct Answer A
Explanation

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