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2021 Feb 70-480 free practice questions
Q41. You are developing an HTML5 web application that displays customer mailing address information.
The application loads addresses from a web service by using AJAX. The following code defines a Customer object and loads address data.
A. Option A
B. Option B
C. Option C
D. Option D
Answer: C
Q42. You develop an application to host user-generated HTML and JavaScript content.
A common error handler in your application must process all unhandled errors.
You need to implement global error handling for the application.
Which code segment should you use?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: A
Q43. You are developing an HTML5 web page.
The appearance of the text box must change when a user moves the focus to another element on the page.
You need to develop the page to respond to user action.
Which line of code should you use?
A. <input type="text" onblur="resetStyle(this);" />
B. <input type="text" onfocus="resetStyle(this);" />
C. <input type="text" onreset="resetStyle(this);" />
D. <input type="text" onselect="resetStyle(this);" />
Answer: A
Q44. You develop a webpage by using HTML5.
The user interface of the webpage must show a gray-lined box that contains the label Enter your information:. Inside the box are two labels and two input boxes. The first input box must be labeled Name:. The second input box must be labeled Email:.
Below the box is a Submit button.
The user interface must look like the following; You need to create the user interface. Which markup should you use?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: B
Q45. You develop a webpage that allows a user to download a 3PEG image and convert it to a PNG file.
You need to implement the code to download the contents of the JPEG image with no additional decoding.
Which JavaScript function should you use?
A. readAsBinaryString()
B. readAsArrayBuffer()
C. readAsDataURL()
D. readAsText()
Answer: B
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Q46. You are developing a web page that has a group of HI and H2 elements. The page also includes a CSS class named underlineMe.
You have the following requirements:
The font color of all H1 and H2 elements must be changed to red.
The CSS class underlineMe must be applied to all H1 and H2 elements.
You need to update the web page to meet the requirements. Which code segment should you use?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: D
Q47. You develop an HTML application that contains a table that displays a list of products. The table is defined with the following HTML markup:
You need to implement the CSS selectors to select the rows that must have a blue background.
Which CSS selector should you use?
A. thead:only-child, tbody:after, table:before
B. tr [line |-0, 1, 3]
C. tr:first-of-type, tr:last-of-type
D. tr:first-line, tr:last-child
Answer: B
Q48. You are developing a web page that consumes a Windows Communication Foundation (WCF) service. The page includes the following code segment.
var xhr = new XMLHttpRequest() ;
The page uses the xhrHandler() method to listen for changes to the request status of the WCF service calls. It uses the xmlToJavaScript() method to convert the response from the WCF service to a JavaScript object.
The xhrHandler() method must be called automatically each time the request status changes.
You need to add the event handler to the request object.
Which line of code should you use?
A. xhr.onCallback = xhrHandler;
B. xhr.onreadystatechange = xhrHandler;
C. xhr.readyState = xhrHandler;
D. xhr.status = xhrHandler;
Answer: B
Q49. 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
Q50. You develop a web application by using jQuery. You develop the following jQuery code: (Line numbers are included for reference only.)
The web application exposes a RESTful web API that has an endpoint of/product/create.
You need to create a new product by using AJAX.
Which code segment should you insert at line 05?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: D