Using JavaScript and JSON in Django | Week 3
Course Name: Django for Everybody
Sub-course: Using JavaScript and JSON in Django
Course Link: Django for Everybody
Sub-course Link: Django Features and Libraries
These are Using JavaScript and JSON in Django Week 3 Answers Coursera Quiz
JavaScript and the Browser
Q1. What does the following JavaScript accomplish?
- Ascertain if the document is ready to load
- Clear the browser window so drawing can start in the upper left hand corner
- Enable the retrieval of data in the JSON format
- Register a function that will be called when the HTML document is completely loaded
Answer: Register a function that will be called when the HTML document is completely loaded
Q2. What portion of the DOM (Document Object Model) will be affected by the following JavaScript statement:
- All elements in the DOM
- All tags with a class atribute of “para”
- A tag with an id atribute of “para”
- A tag with a class atribute of “para”
Answer: A tag with an id atribute of “para”
These are Using JavaScript and JSON in Django Week 3 Answers Coursera Quiz
Q3. What does the following JavaScript code do?
- Replace all the HTML on the page
- Write HTML into the “under construction” DOM
- Replace the contents of all p tags in the DOM
- Scroll the window to the bottom of all content
Answer: Write HTML into the “under construction” DOM
Q4. Which of the following lines will call the function “myFunc” five seconds in the future.
- setTimeout(myFunc, 5);
- setTimeout(‘myFunc’, 5);
- setTimeout(myFunc, 5000);
- setTimeout(myFunc(), 5000);
Answer: setTimeout(myFunc, 5000);
These are Using JavaScript and JSON in Django Week 3 Answers Coursera Quiz
Q5. When do we see a scroll bar in a browser?
- When the ‘EnableScroll’ event is active
- When the window is larger than the DOM
- When the DOM is too large to fit in the window
- When the window height is increased
Answer: When the DOM is too large to fit in the window
Q6. Which of the following JavaScript statements will hide spiner.gif in this HTML?
- $(“.chatcontent”).toggle();
- document.getElementById(“chatcontent”).style.display = ‘none’
- document.getElementById(“chatcontent”).hide();
- document.getElementById(“#chatcontent”).hide();
- $(“#chatcontent”).hide();
Answer: document.getElementById(“chatcontent”).style.display = ‘none’
These are Using JavaScript and JSON in Django Week 3 Answers Coursera Quiz
Q7. What does document.createElement() do?
- Clear the contents of a div from AJAX
- Start the server session for the current browser tab
- Create a new element / tag that is not connected to the document
- Open a blank window in a new browser tab
Answer: Create a new element / tag that is not connected to the document
Q8. The ‘onclick=’ attribute is effectively a shotcut to which of these methods?
- addClickHandler()
- document.ready()
- addEventListener()
- document.onClick()
Answer: addEventListener()
These are Using JavaScript and JSON in Django Week 3 Answers Coursera Quiz
Q9. When using fetch(), what is the purpose of the .then() method?
- Trigger code after the form POST completes successfully
- Stop DOM display updates from happening until the URL is retrieved
- Register code to be execute when the fetch promise is completed
- Release the memory that was allocated using malloc()
Answer: Register code to be execute when the fetch promise is completed
Q10. Which is the better way to retrieve data in JavaScript – promises / then or async / await?
- None of the above – using input() is the best practice in JavaScript
- It depends and there are a lot of different opinions
- Async / await
- Promises
Answer: It depends and there are a lot of different opinions
These are Using JavaScript and JSON in Django Week 3 Answers Coursera Quiz
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