MCQOPTIONS
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MCQOPTIONS
This section includes 78 Mcqs, each offering curated multiple-choice questions to sharpen your Javascript knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following property(s) has a default value as false? |
| A. | isableWhenFirebugActive |
| B. | howIconWhenHidden |
| C. | isableXHRListener |
| D. | oth disableWhenFirebugActive & showIconWhenHidden |
| Answer» D. oth disableWhenFirebugActive & showIconWhenHidden | |
| 2. |
Which of the following can be used for a deeper analysis of the web page’s performance? |
| A. | ebPageTest |
| B. | ireBug |
| C. | Slow |
| D. | ll of the mentioned |
| Answer» D. ll of the mentioned | |
| 3. |
Which of following shows a poorer runtime performance for coalescing functionality, using functions, and using objects? |
| A. | irefox unwoundfun |
| B. | irefox UsingFunct |
| C. | irefox UsingObject |
| D. | one of the mentioned |
| Answer» B. irefox UsingFunct | |
| 4. |
Which of the following is the approach used to compress HTML in web servers and modern web browsers? |
| A. | ontent encoding |
| B. | ontent decoding |
| C. | ompression algorithm – DEFLATE |
| D. | one of the mentioned |
| Answer» B. ontent decoding | |
| 5. |
Which of the following shows a poorer runtime performance for coalescing functionality, using functions, and using objects? |
| A. | Firefox unwoundfun |
| B. | Firefox UsingFunct |
| C. | Firefox UsingObject |
| D. | Firefox UsingStruct |
| Answer» B. Firefox UsingFunct | |
| 6. |
Firebug can be used to inspect ___________ |
| A. | HTML |
| B. | CSS |
| C. | DOM |
| D. | All of the mentioned |
| Answer» E. | |
| 7. |
What is scorched-earth optimizations? |
| A. | They optimize based on certain constraints |
| B. | They strip out everything including best practices |
| C. | Based on certain constraints |
| D. | Striping out additional things |
| Answer» C. Based on certain constraints | |
| 8. |
What is the function of a Closure Compiler? |
| A. | Originates the JavaScript |
| B. | Compiles the JavaScript |
| C. | Rewrites JavaScript |
| D. | Links the JavaScript |
| Answer» D. Links the JavaScript | |
| 9. |
What is the purpose of the Block tab? |
| A. | To block the response |
| B. | To block the request |
| C. | To block the mouse pointer |
| D. | To block the cursor |
| Answer» C. To block the mouse pointer | |
| 10. |
Which of the following shows a better runtime performance for coalescing functionality, using functions, and using objects? |
| A. | Firefox unwoundfun |
| B. | Firefox UsingFunct |
| C. | Firefox UsingObject |
| D. | Firefox UsingStruct |
| Answer» C. Firefox UsingObject | |
| 11. |
What does the JS File return? |
| A. | File I/O |
| B. | Minify JavaScript |
| C. | HTTP Request |
| D. | Gzip encoded |
| Answer» C. HTTP Request | |
| 12. |
What is the purpose of the Video tab? |
| A. | To take video of the page |
| B. | To capture screenshots of the test only |
| C. | To take video of the test |
| D. | To capture screenshots of the page |
| Answer» E. | |
| 13. |
The let keyword can be used ___________ |
| A. | in a for or for/in loop, as a substitute for var |
| B. | as a block statement, to define new variables |
| C. | to define variables that are scoped to a single expression |
| D. | all of the mentioned |
| Answer» E. | |
| 14. |
Which of the following methods adds an arc to the current subpath? |
| A. | bezierCurveTo() |
| B. | arcTo() |
| C. | arc() |
| D. | Curve() |
| Answer» D. Curve() | |
| 15. |
Which status code indicates that the server could not find the resource requested? |
| A. | 200 |
| B. | 404 |
| C. | 500 |
| D. | 566 |
| Answer» C. 500 | |
| 16. |
What does the status code 500 indicate? |
| A. | Error in request |
| B. | Error in response |
| C. | Error in server |
| D. | Successful |
| Answer» B. Error in response | |
| 17. |
When is an application said to show a runtime performance? |
| A. | Speed of response to user |
| B. | Speed of user request |
| C. | Speed of sending data |
| D. | Speed of receiving data |
| Answer» B. Speed of user request | |
| 18. |
Which is the game that requires extremely minified source in the Perl culture? |
| A. | Perl pool |
| B. | Perl golf |
| C. | Both Perl pool and golf |
| D. | Perl bat |
| Answer» C. Both Perl pool and golf | |
| 19. |
What is the maximum size of an IP packet for IPv4 or IPv6? |
| A. | 65540 |
| B. | 65535 |
| C. | 65577 |
| D. | 67544 |
| Answer» C. 65577 | |
| 20. |
In order to skip or seek to the desired location in a sound or video, which property becomes helpful? |
| A. | audioSkip |
| B. | currentTime |
| C. | videoSkip |
| D. | skiptoTime |
| Answer» C. videoSkip | |
| 21. |
The Closure Compiler was introduced by ___________ |
| A. | Microsoft |
| B. | Apple |
| C. | |
| D. | Yahoo |
| Answer» D. Yahoo | |
| 22. |
Which of the following can be used for a deeper analysis of the web page's performance? |
| A. | WebPageTest |
| B. | FireBug |
| C. | YSlow |
| D. | All of the mentioned |
| Answer» D. All of the mentioned | |
| 23. |
What is the purpose of the Auth tab in the testing platform? |
| A. | To specify credentials |
| B. | To authorize a page |
| C. | To run the test |
| D. | To run user access |
| Answer» B. To authorize a page | |
| 24. |
Which is the game that requires extremely minified source in the Perl culture?%! |
| A. | Perl pool |
| B. | Perl golf |
| C. | Both Perl pool and golf |
| D. | None of the mentioned |
| Answer» C. Both Perl pool and golf | |
| 25. |
Which of the following is the approach used to compress HTML in web servers and modern web browsers?%! |
| A. | Content encoding |
| B. | Content decoding |
| C. | Compression algorithm – DEFLATE |
| D. | None of the mentioned |
| Answer» B. Content decoding | |
| 26. |
Which of the following are JavaScript optimizers?%! |
| A. | JSMin |
| B. | Packer |
| C. | Minify |
| D. | Both JSMin and Packer |
| Answer» E. | |
| 27. |
*$_What is the purpose of Auth tab in the testing platform?? |
| A. | To specify credentials |
| B. | To authorize a page |
| C. | To run the test |
| D. | None of the mentioned |
| Answer» B. To authorize a page | |
| 28. |
*$_What is the task of the Advanced Panel?? |
| A. | Test stop running |
| B. | Loading the pages |
| C. | Skewing the results |
| D. | None of the mentioned |
| Answer» B. Loading the pages | |
| 29. |
*$_How does PhantonJS use YSlow?? |
| A. | Queries |
| B. | Statements |
| C. | Command Line Prompt |
| D. | Command Line Script |
| Answer» E. | |
| 30. |
*$_Which of the following is mandatory to run before running YSlow?? |
| A. | WebPageTest |
| B. | FireBug |
| C. | Both WebPageTest and FireBug |
| D. | None of the mentioned |
| Answer» C. Both WebPageTest and FireBug | |
| 31. |
*$_What is the purpose of the advanced mode in the Closure compiler?? |
| A. | Removing the variables and other parameters |
| B. | Renaming the variables and other parameters |
| C. | Slight alteration to improve the runtime performance |
| D. | None of the mentioned |
| Answer» C. Slight alteration to improve the runtime performance | |
| 32. |
*$_Which of the following is not a feature of the User Interface?? |
| A. | Skinnable Interface |
| B. | Resizable Side Panel |
| C. | Fixed Side Panel |
| D. | Menu options |
| Answer» D. Menu options | |
| 33. |
*$_What is the maximum size of an IP packet for IPv4 or IPv6?? |
| A. | 65540 |
| B. | 65535 |
| C. | 65577 |
| D. | 67544 |
| Answer» C. 65577 | |
| 34. |
*$_What is the advantage of the code produced graphics being smaller than the images themselves?? |
| A. | Bandwidth saving |
| B. | Increase in bandwidth |
| C. | Dynamic advantages |
| D. | None of the mentioned |
| Answer» B. Increase in bandwidth | |
| 35. |
*/*_From which did Minification concept originate?? |
| A. | JavaScript code efficiency |
| B. | JavaScript interpreter |
| C. | Both JavaScript code efficiency and interpreter |
| D. | None of the mentioned |
| Answer» C. Both JavaScript code efficiency and interpreter | |
| 36. |
*/*_Which of the following is the order of Minify process?? |
| A. | Remove extraneous characters, gzip the response, Read |
| B. | Remove extraneous characters, Read, gzip the response |
| C. | Read, Remove extraneous characters, gzip the response |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 37. |
*/*_The Closure Compiler was introduced by? |
| A. | Microsoft |
| B. | Apple |
| C. | |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 38. |
*/*_What is the purpose of the transport layer?? |
| A. | TCP Communication takes place |
| B. | UDP Communication takes place |
| C. | Both TCP and UDP Communication takes place |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 39. |
%_When does WebPageTest become necessary?_% |
| A. | To run any common website |
| B. | To run private websites |
| C. | To run QA testing |
| D. | All of the mentioned |
| Answer» C. To run QA testing | |
| 40. |
%_What is the purpose of the Video tab?_% |
| A. | To take video of the page |
| B. | To capture screenshots of the test only |
| C. | To take video of the test |
| D. | To capture screen shots of the page |
| Answer» E. | |
| 41. |
%_The let keyword can be used_% |
| A. | in a for or for/in loop, as a substitute for var |
| B. | as a block statement, to define new variables |
| C. | to define variables that are scoped to a single expression |
| D. | all of the mentioned |
| Answer» E. | |
| 42. |
%_How many rules are there in the YSlow version 2.0?_% |
| A. | 23 |
| B. | 21 |
| C. | 27 |
| D. | 33 |
| Answer» B. 21 | |
| 43. |
%_In how many modes can the Closure compiler be run?_% |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» B. 3 | |
| 44. |
%_What are the goals for using Firebug?_% |
| A. | Performance |
| B. | Adaptability |
| C. | Complexity |
| D. | Reliability |
| Answer» B. Adaptability | |
| 45. |
%_Which status code indicates that the server could not find the resource requested?_% |
| A. | 200 |
| B. | 404 |
| C. | 500 |
| D. | 566 |
| Answer» C. 500 | |
| 46. |
%_What does the span of time waiting for the page to be useful depend on?_% |
| A. | Runtime performance |
| B. | Web performance |
| C. | Speed |
| D. | None of the mentioned |
| Answer» C. Speed | |
| 47. |
_ What is the purpose of minifying the JavaScript?$? |
| A. | To streamline the visits |
| B. | To save the visits |
| C. | All of the mentioned |
| D. | None of the mentioned |
| Answer» B. To save the visits | |
| 48. |
_ Which folder contains the Minify control panel?$? |
| A. | /min/builder/ |
| B. | /builder/ |
| C. | /minify/build |
| D. | /minify/builder |
| Answer» B. /builder/ | |
| 49. |
_ What is scorched-earth optimizations?$? |
| A. | They optimize based on certain constraints |
| B. | They strip out everything including best practices |
| C. | Based on certain constraints |
| D. | None of the mentioned |
| Answer» C. Based on certain constraints | |
| 50. |
_ How does the handshake help the server?$? |
| A. | Acknowledge |
| B. | Accept the attempt |
| C. | Both Acknowledge and Accept the attempt |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |