Microsoft 70-480 Online Questions & Answers

• Question 141:

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

  A customer must enter a value in the text box prior to submitting the form.

  You need to add validation to the text box control.

  Which HTML should you use?

  A

  ---

  Definition and Usage

  The required attribute is a boolean attribute.

  When present, it specifies that an input field must be filled out before submitting the form.

  Example

  An HTML form with a required input field:

  Username:

  Username:

  Reference: HTML required Attribute

  http://www.w3schools.com/tags/att_input_required.asp

• Question 142:

  A web application has a web page that contains an HTML5 CANVAS element. A web worker extracts messages from the CANVAS element.

  You need to ensure that the web worker can read the message sent by the web page.

  Which three object types can you use? Each correct answer presents a complete solution.

  A. JSON
  B. parent
  C. JavaScript
  D. window
  E. string
  F. DOM
  A. JSON
  C. JavaScript
  E. string

  ---

  References: https://www.html5rocks.com/en/tutorials/workers/basics/

• Question 143:

  You are developing a web page that includes the following HTML. Hello, World! You need to use inline CSS styling to format the text with Arial font. Which code segment should you use?

  

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

  ---

  The font-family property specifies the font for an element.

  Incorrect Answers:

  A, D: This is not inline CSS.

  C: With font style we define style only:

  Syntax: font-style: normal|italic|oblique|initial|inherit;

  Reference: https://www.w3schools.com/CSSref/pr_font_font-family.asp

• Question 144:

  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
  A. JSON
  D. String
  E. JavaScript

  ---

  Example:

  var myHelloWorker = new Worker('helloworkers.js');

  You'll then start the worker (andthus a thread under Windows) by sending it a first message:

  myHelloWorker.postMessage();

  Indeed, the Web Workers and the main page are communicating via messages. Those messages can be formed with normal strings or JSON objects.

  (E) The Web Workers APImakes it possible to execute a JavaScript file asynchronously and autonomously. A web worker is essentially a thread executing a JavaScript file.

  (A, D) In the first implementations of web workers the browsers only allowed strings to be exchanged as messages. However, recent implementations allow for exchange of values or JSON objects.

  References:

  https://www.w3schools.com/HTML/html5_webworkers.asp

• Question 145:

  You have a web API that responds to a GET request and returns an image as an array of bytes.

  You need to create a page that contains a button to requests the image. The response must be displayed as an image on the page.

  Which two code segments can you use to achieve the goal? Each correct answer presents a complete solution.

  NOTE: Each correct selection is worth one point.

  

  A. B. C.
  BC

  ---

  Reference: https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest/responseType

• Question 146:

  You are developing an HTML5 web application that provides a discussion forum for users. When a user registers to access the application, the user enters an email address.

  Users can enter data that can result in cross-site scripting (XSS) attacks.

  You need to ensure that email input is as secure as possible.

  Which two techniques should you use? (Each correct answer presents a complete solution. Choose two.)

  A. Remove all nonalphanumeric characters before submitting data.
  B. Use the email tag in forms where the email address is entered.
  C. Display all email addresses inside of an HTML5 ADDRESS element.
  D. Use jQuery validation with a regular expression to ensure that email addresses are valid.
  E. Ensure that all form data is encrypted when it is submitted.
  B. Use the email tag in forms where the email address is entered.
  D. Use jQuery validation with a regular expression to ensure that email addresses are valid.

  ---

  B: The is used for input fields that should contain an e-mail address. Depending on browser support, the e-mail address can be automatically validated when submitted. Some smartphones recognize the email type, and adds ".com" to the keyboard to match email input.

  D: JQuery can be used to validate email addresses.

  References: https://www.w3schools.com/html/html_form_input_types.asp https://www.formget.com/email-validation-jquery-codes/

• Question 147:

  You are developing an HTML5 web application and are styling text.

  You need to use the text-transform CSS property.

  Which value is valid for the text-transform property?

  A. Lowercase
  B. Blink
  C. Line-through
  D. 20px
  A. Lowercase

  ---

  CSS Syntax

  text-transform: none|capitalize|uppercase|lowercase|initial|inherit;

  References:

  https://www.w3schools.com/cssref/pr_text_text-transform.asp

• Question 148:

  You develop an HTML5 webpage. You have the following HTML markup: (Line numbers are for reference only.)

  

  The webpage also contains the following CSS markup:

  

  You need to determine how the webpage will appear when the CSS styles are applied. Select two.

  A. The first row of the table will have a red background.
  B. The second row of the table will have a red background.
  C. The second cell in the first row of the table will have a blue background.
  D. The second cell in the third row of the table will have a blue background.
  E. The second cell in the third row of the table will have not have blue background.
  A. The first row of the table will have a red background.
  E. The second cell in the third row of the table will have not have blue background.

  ---

  

• Question 149:

  You are developing an HTML page that includes the following code.

  A Static Page

  You need to modify the content of the H1 element dynamically by using JavaScript.

  Which code segment should you use?

  

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

  D. Option D

  ---

  innerHTML

  The innerHTML property sets or returns the HTML content (inner HTML) of an element.

  Example

  Change the HTML content of a

  element with id="header":

  document.getElementById("header").innerHTML = "A dynamic page";

  References:

  https://www.w3schools.com/jsref/prop_html_innerhtml.asp

• Question 150:

  DRAG DROP

  You develop code in JavaScript. The code calls a functions named fnl.

  Sometimes, fnl throws a RangeError on a SyntaxError error.

  You need to create code to meet the following requirements:

  Develop the solution by selecting and arranging the required code blocks in the correct order. You may not need all of the code blocks.

  Select and Place: