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Welcome to the Invocation and Performance MCQs Page

Dive deep into the fascinating world of Invocation and Performance with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Invocation and Performance, a crucial aspect of JavaScript. In this section, you will encounter a diverse range of MCQs that cover various aspects of Invocation and Performance, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within JavaScript.

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Check out the MCQs below to embark on an enriching journey through Invocation and Performance. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of JavaScript.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Invocation and Performance. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Invocation and Performance MCQs | Page 2 of 9

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Q11.
How many properties does a prototype object have?

a.

6

b.

7

c.

8

d.

9

Discuss
Answer: (b).7
Q12.
Which of the following does not serialize the undefined values or objects within an object?

a.

JSON.string

b.

JSON

c.

JSON.stringify

d.

None of the mentioned

Discuss
Answer: (c).JSON.stringify
Q13.
How many properties are there in the interface PerformanceTiming?

a.

21

b.

22

c.

23

d.

24

Discuss
Answer: (a).21
Q14.
How many properties are there in window.performance object?

a.

1

b.

4

c.

2

d.

3

Discuss
Answer: (c).2
Q15.
What is the purpose of the navigation property in the window.performance object?

a.

To which page the user navigated

b.

How the user navigated

c.

All of the mentioned

d.

None of the mentioned

Discuss
Answer: (b).How the user navigated
Q16.
What is the purpose of the property PerformanceTiming.navigationStart?

a.

Ready to end the navigation

b.

Ready to jump the navigation

c.

Ready for navigation

d.

None of the mentioned

Discuss
Answer: (c).Ready for navigation
Q17.
Which of the following does JSON.stringify not serialize?

a.

Undefined values

b.

Functions within an object

c.

Both Undefined values and Functions within an object

d.

None of the mentioned

Discuss
Answer: (c).Both Undefined values and Functions within an object
Q18.
What is the purpose of the property PerformanceTiming.fetchStart?

a.

Browser ready to fetch input

b.

Browser ready to fetch document

c.

Browser ready to fetch summary

d.

All of the mentioned

Discuss
Answer: (b).Browser ready to fetch document
Q19.
Which of the following property is associated with the Request event?

a.

requestStart

b.

requestEnd

c.

both requestStart and requestEnd

d.

none of the mentioned

Discuss
Answer: (a).requestStart
Q20.
Which of the following API can be used to get the timing without affecting the page loading process?

a.

Navigation API

b.

Timing API

c.

Navigation Timing API

d.

None of the mentioned

Discuss
Answer: (c).Navigation Timing API
Page 2 of 9

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