gs gs106 Caching, Debugging and Animation - JavaScript and Memory Leak - Quiz No.1
gs gs106 Javascript Quiz
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Question 1: Where are memory leaks found?
Client side objects
Server side objects
Both Client side and Server side objects
User side objects
Question 2: Which handler is triggered when the content of the document in the window is stable and ready for manipulation?
onload
manipulate
create
oncreate
Question 3: What is the central concept of JavaScript memory management?
Reliability
Reachability
Efficiency
Transparency
Question 4: When does a memory leak happen?
Browser doesn’t release memory from objects unnecessary
Browser releases too many memories
Browser releases memory iteratively
Browser releases memory quickly
Question 5: What will happen when the data of the jQuery.cache is read from an element?
Unique number is retrieved as elem[jQuery.expando]
Data is read from jQuery.cache[id]
Unique number is retrieved as elem[jQuery.expando] & Data is read from jQuery.cache[id]
Data is cleared from jQuery.cache[id]
Question 6: The style property belongs to which of the following object?
Element
Window
Location
Navigation
Question 7: Which of the following functions are referenced internally?
setTimeout
setInterval
both setTimeout and setInterval
clearInterval
Question 8: What is the purpose of destroying the functions and objects?
Consume unnecessary CPU cycles
Prevent the dropping of reference count to 0
Centralize the responsibility to clean up
All of the mentioned
Question 9: When does a cycle occur during memory leak?
No reference occurs
Two objects reference
One object gets referenced
Three object gets referenced
Question 10: Which of the following is a way to retain an object in memory?
Console Log
Closures
Destroy objects
Clear object
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