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Category: 70-480 (v.3)

Exam 70-480: Programming in HTML5 with JavaScript and CSS3 (updated December 1st, 2014)

Which line of code should you use?

You are developing a web page by using HTML5 and C5S3. The page includes a <div> tag with the ID
set to validate.
When the page is rendered, the contents of the <div> tag appear on a line separate from the content
above and below it. The rendered page resembles the following graphic.

The page must be rendered so that the <div> tag is not forced to be separate from the other
content. The following graphic shows the correctly rendered output.

You need to ensure that the page is rendered to meet the requirement.
Which line of code should you use?

Which code segment should you use?

HOTSPOT
You are creating a web worker for an HTML5 application.
The following tasks must be performed from within the web worker:
Register an event listener for the web worker
Start and stop the web worker
You need to define a function that performs the required tasks.
Which code segment should you use? (To answer, select the appropriate option from the drop-down
list in the answer area.)

Which two code segments can you use?

You are creating a JavaScript function that displays the name of a web application.
You declare the following button element.
<input type=”button” id= “About” value=”About” />
When a user clicks the button, a JavaScript function named About must be called.
You need to create an event handler that calls the About function when the button is clicked.
Which two code segments can you use? (Each correct answer presents a complete solution. Choose two.)

How should you build the code segment?

HOTSPOT
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 dropdown lists in the answer area.)

Which code segment should you use?

You are developing an application that uses a third-party JavaScript library named doWork().
The library occasionally throws an “object is null or undefined” error with an error code of
-2146823281.
The application must:
Extract and handle the exceptions thrown by doWork()
Continue normal program execution if other exceptions occur
You need to implement the requirements.
Which code segment should you use?

Which two actions will achieve this goal?

You are developing a web application that consumes services from a third-party application. A web
worker processes the third-party application requests in the background. A page in the application
instantiates the web worker process.
You need to establish two-way communications between the web worker process and the page.
Which two actions will achieve this goal? (Each correct answer presents a complete solution. Choose
two.)


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