Microsoft 70-480 Exam Questions – (Jan-2018 dumps)

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70-480 exam questions, 70-480 PDF dumps; 70-480 exam dumps:: (241 Q&A) (New Questions Are 100% Available! Also Free Practice Test Software!)

Latest and Most Accurate Microsoft 70-480 Dumps Exam Questions and Answers:

Version: 16.0
Question: 21

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
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?

A. Option A
B. Option B
C. Option C
D. Option D

Answer: C

* The try statement lets you test a block of code for errors.
The catch statement lets you handle the error.
The JavaScript statements try and catch come in pairs:
try {
Block of code to try
catch(err) {
Block of code to handle errors
* object.number [= errorNumber]
Returns or sets the numeric value associated with a specific error. The Error object’s default property is number.
* Example:
The following example causes an exception to be thrown and displays the error code that is derived from the error number.
// Cause an error.
var x = y;
document.write (“Error Code: “);
document.write (e.number & 0xFFFF)
document.write (”

document.write (“Facility Code: “)
document.write(e.number>>16 & 0x1FFF)
document.write (”

document.write (“Error Message: “)
document.write (e.message)
The output of this code is as follows.
Error Code: 5009
Facility Code: 10
Error Message: ‘y’ is undefined
Reference: JavaScript Errors – Throw and Try to Catch; number Property (Error) (JavaScript)

Question: 22

You are troubleshooting a web page that includes the following code. (Line numbers are included for reference only.)

What is displayed in the alert from line 11?

A. Div
B. Function
C. Button
D. Document

Answer: C

* The event handler here normalizes event object (passed as a first argument) and invokes handleCellClick in a proper context (i.e. referring to an element that was attached event listener to). The element is the button elButton.
* addEventListener
Syntax: element.addEventListener(event, function, useCapture)
Reference: HTML DOM addEventListener() Method

Question: 23

You are developing a customer contact form that will be displayed on a page of a company’s website. The page collects information about the customer.
If a customer enters a value before submitting the form, it must be a valid email address.
You need to ensure that the data validation requirement is met.
What should you use?


Answer: D




Question: 24

You are developing a customer web form that includes the following HTML.

A. $(“#txtValue”).val = (JSONObject.Confirmation);
B. $(“#txtValue”).val (JSONObject.Confirmation);
C. $(“#txtValue”).text = (JSONObject.Confirmation);
D. $(“#txtValue”).text (JSONObject.Confirmation);

Answer: D

not A, not B: A label object has no value attribute.

Question: 25

You are developing an application that consumes a Windows Communication Foundation (WCF) service.
The application interacts with the service by using the following code. (Line numbers are included for reference only.)

You need to authenticate to the WCF service.
What should you do?

A. At line 11, add the following lines of code.
,username: yourusername
,password: yourpassword
B. At line 11, add the following line of code.
,credentials: prompt
C. At line 06, replace the code with the following line of code.
url: “
D. At line 11, add the following line of code. The username and password will be stored in an XML file.
,credentials: credentials.xml

Answer: C

Question: 26

You are developing a web page that enables customers to upload documents to a web server. The page includes an HTML5 PROGRESS element named progressBar that displays information about the status of the upload.
The page includes the following code. (Line numbers are included for reference only.)

An event handler must be attached to the request object to update the PROGRESS element on the page.
You need to ensure that the status of the upload is displayed in the progress bar.
Which line of code should you insert at line 03?

A. xhr.upload.onloadeddata =
B. xhr.upload.onplaying =
C. xhr.upload.onseeking =
D. xhr.upload.onprogress =

Answer: D

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