MCQOPTIONS
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MCQOPTIONS
This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your JavaScript Questions & Answers Integrating the Performance Object with perfLogger knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following property is associated with the Request event? |
| A. | requestStart |
| B. | requestEnd |
| C. | both requestStart and requestEnd |
| D. | requestchange |
| Answer» B. requestEnd | |
| 2. |
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. | Browser ready to fetch output |
| Answer» C. Browser ready to fetch summary | |
| 3. |
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. | Functions outside the object |
| Answer» D. Functions outside the object | |
| 4. |
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. | Ready to changing the navigation |
| Answer» D. Ready to changing the navigation | |
| 5. |
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. | Information about the page |
| D. | Information of the curser |
| Answer» C. Information about the page | |
| 6. |
How many properties are there in window.performance object? |
| A. | 1 |
| B. | 4 |
| C. | 2 |
| D. | 3 |
| Answer» D. 3 | |
| 7. |
How many properties are there in the interface PerformanceTiming? |
| A. | 21 |
| B. | 22 |
| C. | 23 |
| D. | 24 |
| Answer» B. 22 | |
| 8. |
How many properties does a prototype object have? |
| A. | 6 |
| B. | 7 |
| C. | 8 |
| D. | 9 |
| Answer» C. 8 | |