gs gs106 Invocation and Performance Navigation - JavaScript Lazy Loading - Quiz No.1
gs gs106 Javascript Quiz
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Question 1: What is the purpose of lazy loading?
Immediate loading is necessary
Loading under command
Immediate loading is not necessary
Loading after a definite interval
Question 2: Where is the external JavaScript placed in the case of lazy loading?
After window.onload event
Before window.onload event
In the header tag
In the HTML tag
Question 3: What are the parameters of the attachEvent function?
Function
Function, Event
Event, Function
Event
Question 4: What is the result when the showPerformanceMetrics() is called before loading the remote script?
Throws an exception
Throws an error
It will load by itself
Throws an exception and It will load by itself
Question 5: Which of the following is an attribute to the script object?
onclick
onload
onshow
onhover
Question 6: Which is the method used to add an event listener?
addEventListener()
addListener()
addEvent(Listener)
addListener(Event)
Question 7: What is the purpose of the domLoading attribute?
Document exists
Document can load
Document has loaded
Document begins to load
Question 8: How is the render time calculated?
Date.Now()
Date.Now() – performance.timing.domLoading
performance.domLoading
Date.Now() – performance.domLoading
Question 9: The object whose properties are inherited by all instances of the class, and properties whose values are functions behaving like instance methods of the class, is _____________
Instance object
Constructor object
Destructor object
Prototype object
Question 10: You can refresh the webpage in JavaScript by using ___________
window.reload
location.reload
window.refresh
page.refresh
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