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Q16. 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
Q17. You are developing an HTML page that includes the following code.
<h1 id="header">A Static Page</hl>
You need to modify the content of the HI element dynamically by using JavaScript.
Which code segment should you use?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: D
Q18. 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
Q19. 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
Q20. 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
Q21. You need to test the value of the following variable in JavaScript.
var length = "75";
A block of code must execute if the length equals 75 regardless of the data type.
You need to use the statement that meets this requirement.
Which lines of code should you use? (Each correct answer presents a complete solution. Choose two.)
A. if (length = = = 75)
B. if (length = = 75)
C. if (length! = 75)
D. if (length = = "75")
Answer: BD
Q22. You are developing a customer web form that includes the following HTML input field.
<input id="txtValue"/>
If a customer enters a value in the input field, then it must be a numeric value.
You need to add validation to the input field.
Which HTML should you use?
A. <input id="txtValue" type-"text" pattern="/#" />
B. <input id="txtValue" type="number" />
C. <input id="txtVa!ue" type="integer" />
D. <input id="txtValue" type="text" required="required"/>
Answer: B
Q23. You are developing a customer web form that includes following HTML.
<input id="txtValue"/>
You need to develop the form so that customers can enter only a valid country code consisting of three English alphabet characters.
Which code segment should you use?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: C
Q24. You are developing an HTML5 web application for a surveyor company that displays topographic images.
The application must:
Display the topographic images at different zoom levels without loss of detail Print the topographic images without loss of detail Work from only one source file for each topographic image
You need to ensure that the topographic images display according to the requirements.
Which HTML5 element should you use?
A. SVG
B. CANVAS
C. SAMP
D. AREA
Answer: A
Q25. You are testing the value of the following variable in JavaScript.
var height = "300";
A block of code must execute if the following conditions are true: . The height variable is set to 300 . The height variable is of type string You need to implement the code to run the test.
Which line of code should you use?
A. if (height = = 300)
B. if (height = = "300")
C. if (height ! "300")
D. if (height ! = 300)
Answer: B
Q26. You are developing a page that includes text and an illustration. The web page resembles the following image.
You have the following requirements:
The illustration must be in the center of the page.
The text must flow around the left, right, top, and bottom of the illustration.
You need to ensure that the layout of the web page meets the requirements.
Which line of code should you use?
A. -ms-wrap-side: both;
B. -ms-wrap-side: clear;
C. -ms-wrap-side: maximum;
D. -ms-wrap-side: auto;
Answer: A
Q27. You are creating a JavaScript object that represents a customer.
You need to extend the Customer object by adding the GetCommission method.
You need to ensure that all future instances of the Customer object implement the GetCommission method.
Which code segment should you use?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: D
Q28. 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: "http://contoso.com/Service.svc/GetCountry? Username=username&password=psssword",
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: A
Q29. You are creating an HTML5 application that allows users to play video on a page by using the VIDEO element.
You need to enable the user to start, stop, and pause the video.
Which line of code should you add to the page?
A. <video id= "myVideo" height="320" width="400" src="myVideo.vtt" contextmenu="pauseplay"> </video>
B. <video id="myVideon heigh"="320" width="400" src="myVideo.vtt" controls> </video>
C. <video _d="myVideon height="320" width="400" src="myVideo.vtt" autoplay> </video>
D. <video id="myVideo" height="320" width="400" src="myVideo.vtt" contextinenu="Startstopn> </video>
Answer: B
Q30. You are troubleshooting an application. Users report that the UI is slow to respond.
You need to improve UI responsiveness by moving application tasks to web workers.
Which two tasks can you move to achieve this goal? (Each correct answer presents a complete solution. Choose two.)
A. A function that loops through the Document Object Model to update the style of page elements
B. A long-running calculation that requires looping through an array
C. A function that performs graphic-intensive animation
D. A function that stores large amounts of data to local storage
Answer: BC