Microsoft 70-480 Exam Practice Questions (P. 4)
- Full Access (270 questions)
- Six months of Premium Access
- Access to one million comments
- Seamless ChatGPT Integration
- Ability to download PDF files
- Anki Flashcard files for revision
- No Captcha & No AdSense
- Advanced Exam Configuration
Question #16
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?
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?
Question #17
You are developing a web form that includes the following code.
When a user selects the check box, an input text box must be added to the page dynamically.
You need to ensure that the text box is added.
Which function should you use?
When a user selects the check box, an input text box must be added to the page dynamically.
You need to ensure that the text box is added.
Which function should you use?
Question #19
You are developing a web page by using HTML5 and C5S3. The page includes a <div> tag with the ID set to validate.
When the page is rendered, the contents of the <div> tag appear on a line separate from the content above and below it. The rendered page resembles the following graphic.
The page must be rendered so that the <div> tag is not forced to be separate from the other content. The following graphic shows the correctly rendered output.
You need to ensure that the page is rendered to meet the requirement.
Which line of code should you use?
When the page is rendered, the contents of the <div> tag appear on a line separate from the content above and below it. The rendered page resembles the following graphic.
The page must be rendered so that the <div> tag is not forced to be separate from the other content. The following graphic shows the correctly rendered output.
You need to ensure that the page is rendered to meet the requirement.
Which line of code should you use?
Question #20
HOTSPOT -
You are creating a web worker for an HTML5 application.
The following tasks must be performed from within the web worker:
✑ Register an event listener for the web worker
✑ Start and stop the web worker
You need to define a function that performs the required tasks.
Which code segment should you use? (To answer, select the appropriate option from the drop-down list in the answer area.)
Hot Area:
You are creating a web worker for an HTML5 application.
The following tasks must be performed from within the web worker:
✑ Register an event listener for the web worker
✑ Start and stop the web worker
You need to define a function that performs the required tasks.
Which code segment should you use? (To answer, select the appropriate option from the drop-down list in the answer area.)
Hot Area:
Correct Answer:
* addEventListener
The addEventListener() method attaches an event handler to the specified element.
In context of a worker, both self and this refer to the global scope. The worker can either add an event listener for the message event, or it can define the onmessage handler to listen for any messages sent by the parent thread.
* postmessage
Pass a message to the worker.
* close()
Terminating Workers -
Workers are resource-intensive; they are OS-level threads. Therefore, you do no want to create a large number of worker threads, and you should terminate the web worker after it completes its work. Workers can terminate themselves, like this: self.close();
Reference: HTML DOM addEventListener() Method; The Basics of Web Workers
* addEventListener
The addEventListener() method attaches an event handler to the specified element.
In context of a worker, both self and this refer to the global scope. The worker can either add an event listener for the message event, or it can define the onmessage handler to listen for any messages sent by the parent thread.
* postmessage
Pass a message to the worker.
* close()
Terminating Workers -
Workers are resource-intensive; they are OS-level threads. Therefore, you do no want to create a large number of worker threads, and you should terminate the web worker after it completes its work. Workers can terminate themselves, like this: self.close();
Reference: HTML DOM addEventListener() Method; The Basics of Web Workers
All Pages