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2021 Feb 70-480 latest exam
Q21. You are developing a web application that can function when users are not connected to the Internet.
You need to check the Internet connectivity status of a user's browser.
Which method should you use?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: A
Q22. You are developing a web application that uses web workers to process images extracted from an HTML5 CANVAS object on a web page.
You need to pass messages between the web workers and the web page.
Which three types of objects should you use? (Each correct answer presents a complete solution. Choose three.)
A. JSON
B. Window
C. Parent
D. String
E. JavaScript
F. DOM
Answer: ADE
Q23. You develop an HTML5 webpage. You have the following HTML markup:
You need to change the background color for all of the elements whose name attribute ends with the word name.
Which code segment should you add to the webpage?
A. $ ('input [name!="name"]’) .ess ({ 'background-color' : ' #E0ECF8'}) ;
B. ${'input [name~="name"] ') .ess ({ 'background-color' : ' #E0ECF8' }) ;
C. ${'input[name*="name"]').ess({'background=color': #E0ECF8'});
D. $( 'input [name$="name"] ') .ess ({ 'background-color' : '#E0ECF8'});
Answer: D
Q24. You are developing an HTML5 web application that displays the current temperature whenever a button is clicked. The following code provides this functionality.
When the temperature is loaded, the status property on the loader instance does not change.
You need to ensure that the status property on the loader instance is updated when the temperature is loaded.
Which code segment should you use to replace the Loader function?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: A
Q25. You are creating a JavaScript function to display the current version of a web application
You declare a button as follows.
<input type="button" id="About" value="About" />
You need to create an event handler for the button by using an anonymous function.
Which code segment should you use?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: C
Most up-to-date 70-480 exam engine:
Q26. You are developing an HTML5 web application and are styling text.
You need to use the text-transform CSS property.
Which values are valid for the text-transform property?
A. hidden
B. blink
C. capitalize
D. line-through
Answer: C
Q27. You are creating a custom object as described by the following code.
A. Option A
B. Option B
C. Option C
D. Option D
Answer: D
Q28. 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.)
A. From the web worker, use the onconnect event handler of the main page to capture events.
B. From the main page, use the onmessage event handler of the web worker to capture events.
C. From the web worker, use the onmessage event handler of the main page to capture events.
D. From the main page, use the onconnect event handler of the web worker to capture events.
Answer: BC
Q29. You are developing a JavaScript library.
You have the following requirements:
Custom exceptions must include an error message and custom error number. These exceptions must be thrown when data validation errors occur. Developers must call the library to easily catch the exception and identify the problem.
You develop the following code. (Line numbers are included for reference only.)
You need to complete the code to meet the requirements.
Which line of code should you insert at line 09?
A. throw new Validatior.Exception (123, "Day of week must be les3 than 7");
B. return new ValidationException(123, "Day of week must be less than 7");
C. throw ValidationException(123, "Day of week must be less than 7");
D. catch ValidationException(123, "Day of week: must be less than 7");
Answer: A
Q30. You are developing an HTML5 page that has an element with an ID of picture. The page includes the following HTML.
You need to move the picture element lower on the page by five pixels.
Which two lines of code should you use? (Each correct answer presents part of the solution. Choose two.)
A. document.getEIementById("picture").style.position = "relative";
B. document.getElementById("picture").style.top = "5px";
C. document.getEiementById("picture").style.top = "-5px";
D. document.getEIementById("picture").style.position = "absolute";
Answer: AB