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Caching And Debugging MCQ question and answer in javascript with solution

Learn Caching And Debugging MCQ Questions and answers in javascript with easy and logical explanations. Caching And Debugging MCQ question in Javascript which provides all type of technical mcq questions which is important for technical exams, cumpus exams and other entrance examination Page-7 section-1

Each section contains 100 MCQs on Caching and Debugging .
61
What is the significance of scripting?
Discuss
Answer & Solution
Answer: Option B
Solution:
Scripting makes Web pages more dynamic) For example, without reloading a new version of a page it may allow modifications to the content of that page, or allow content to be added to or sent from that page. The former has been called DHTML (Dynamic HTML), and the latter AJAX (Asynchronous JavaScript and XML).
62
What is the purpose of XMLHttpRequest?
Discuss
Answer & Solution
Answer: Option C
Solution:
XMLHttpRequest makes it possible to load additional content from the Web without loading a new document, a core component of AJAX.
63
Which API makes the user’s current location available to browser-based application?
Discuss
Answer & Solution
Answer: Option D
Solution:
The Geolocation API makes the user’s current location available to browser-based applications.
64
Which of the following ensures additional interactivity mechanism?
Discuss
Answer & Solution
Answer: Option A
Solution:
WAI ARIA offers mechanisms to ensure that this additional interactivity remains usable independent of devices and disabilities.
65
What is the necessity to have API?
Discuss
Answer & Solution
Answer: Option B
Solution:
An API may describe the ways in which a particular task is performed.
66
What is the purpose of the event onAirEvent?
Discuss
Answer & Solution
Answer: Option A
Solution:
The event onAirEvent is fired when the player starts playing content being broadcasted on the channel.
67
What is the purpose of the event disconnectionEvent?
Discuss
Answer & Solution
Answer: Option B
Solution:
The event disconnectionEvent is fired when the player disconnects from the channel, whether a result of user interaction or not.
68
When does one use the event ready?
Discuss
Answer & Solution
Answer: Option C
Solution:
The event ready is fired after the player is done loading. It is safe to interact with it after this event fired.
69
When does one use the method startOverlays()?
Discuss
Answer & Solution
Answer: Option C
Solution:
A new ad request is made every time when the method startOverlays() gets called.
70
What is the reason for avoiding the attributes property in the HTML DOM?
Discuss
Answer & Solution
Answer: Option B
Solution:
The reason for avoiding the attributes property in the HTML DOM is because Attributes don’t have attributes.