11.
How many properties does a prototype object have?

12.
Which of the following does not serialize the undefined values or objects within an object?

13.
How many properties are there in the interface PerformanceTiming?

14.
How many properties are there in window.performance object?

15.
What is the purpose of the navigation property in the window.performance object?

16.
What is the purpose of the property PerformanceTiming.navigationStart?

17.
Which of the following does JSON.stringify not serialize?

18.
What is the purpose of the property PerformanceTiming.fetchStart?

19.
Which of the following property is associated with the Request event?

20.
Which of the following API can be used to get the timing without affecting the page loading process?