MCQOPTIONS
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MCQOPTIONS
This section includes 145 Mcqs, each offering curated multiple-choice questions to sharpen your Javascript knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the code for getting the current time? |
| A. | ow = new Date(); |
| B. | ar now = new Date(); |
| C. | ar now = Date(); |
| D. | ar now = new Date(current); |
| Answer» C. ar now = Date(); | |
| 2. |
Client-side JavaScript code is embedded within HTML documents in |
| A. | URL that uses the special javascript:encoding |
| B. | URL that uses the special javascript:stack |
| C. | URL that uses the special javascript:protocol |
| D. | URL that uses the special javascript:code |
| Answer» D. URL that uses the special javascript:code | |
| 3. |
JavaScript code between a pair of “script” tags are called |
| A. | on-inline |
| B. | xternal |
| C. | eferenced |
| D. | nline |
| Answer» E. | |
| 4. |
The HTML5 specification includes |
| A. | ata storage |
| B. | raphics APIs |
| C. | ther APIs for web apps |
| D. | ll of the mentioned |
| Answer» E. | |
| 5. |
The service(s) that enables networking through scripted HTTP requests is |
| A. | MLHttpResponse |
| B. | MLRequest |
| C. | MLHttpRequest |
| D. | ll of the mentioned |
| Answer» D. ll of the mentioned | |
| 6. |
The behaviour of the document elements can be defined by |
| A. | sing document object |
| B. | egistering appropriate event handlers |
| C. | sing element object |
| D. | ll of the mentioned |
| Answer» C. sing element object | |
| 7. |
Which is the method used for registering handlers? |
| A. | n() |
| B. | egister() |
| C. | dd() |
| D. | nclude() |
| Answer» B. egister() | |
| 8. |
Why does Node not block while waiting for operations to complete? |
| A. | tatic |
| B. | synchronous |
| C. | ynchronous |
| D. | one of the mentioned |
| Answer» C. ynchronous | |
| 9. |
The necessary globals of a node are defined under which namespace? |
| A. | ariables |
| B. | ystem |
| C. | rocess |
| D. | sing |
| Answer» D. sing | |
| 10. |
The new Java arrays can be created into a JavaScript programs using which of the following classes? |
| A. | ava.Array |
| B. | ava.lang.* |
| C. | ava.lang.Array |
| D. | ava.lang.reflect.Array |
| Answer» E. | |
| 11. |
The JavaScript classes can be instantiated using _____ operator? |
| A. | reate |
| B. | ew |
| C. | nstantiate |
| D. | reate.new |
| Answer» C. nstantiate | |
| 12. |
When the “end” event fires on EOF when no more data will arrive, which function is called? |
| A. | .on("data",f); |
| B. | .on("end",f); |
| C. | .on("error",f); |
| D. | .on("default",f); |
| Answer» C. .on("error",f); | |
| 13. |
What is the method used to pause “data” events? |
| A. | .pause(); |
| B. | .stop(); |
| C. | .halt(); |
| D. | .wait(); |
| Answer» B. .stop(); | |
| 14. |
What is the code snippet to change the class and let the stylesheet specify the details? |
| A. | imestamp.className = "highlight"; |
| B. | imestamp.className = "change"; |
| C. | imestamp.className = "specify"; |
| D. | imestamp.className = "move"; |
| Answer» B. imestamp.className = "change"; | |
| 15. |
Which of the following is not an object? |
| A. | lement |
| B. | ocation |
| C. | osition |
| D. | indow |
| Answer» D. indow | |
| 16. |
What is the code snippet to update the content of the timestamp element when the user clicks on it? |
| A. | imestamp.onLoad = function() { this.innerHTML = new Date().toString(); } |
| B. | imestamp.onclick = function() { this.innerHTML = new Date().toString(); } |
| C. | imestamp.onload = function() { this.innerHTML = new Date().toString(); } |
| D. | imestamp.onclick = function() { innerHTML = new Date().toString(); } |
| Answer» C. imestamp.onload = function() { this.innerHTML = new Date().toString(); } | |
| 17. |
What is the code snippet to find all container elements with class “reveal”? |
| A. | ar elements = document.getElementsByClassName("reveal"); |
| B. | ar elements = document.getElementByClassName("reveal"); |
| C. | ar elements = document.getElementByName("reveal"); |
| D. | ar elements = document.getElementsClassName("reveal"); |
| Answer» B. ar elements = document.getElementByClassName("reveal"); | |
| 18. |
The style property belongs to while of the following object? |
| A. | lement |
| B. | indow |
| C. | ocation |
| D. | one of the mentioned |
| Answer» B. indow | |
| 19. |
What are the properties supporting CSS styles for a document element? |
| A. | tyle and font |
| B. | tyle and className |
| C. | ize and style |
| D. | lassName and font |
| Answer» C. ize and style | |
| 20. |
What is the function used to deregister event handler ‘f’? |
| A. | eleteAllListeners(name) |
| B. | eleteListener(name,f) |
| C. | emoverListener(name,f) |
| D. | emoveAllListeners(name) |
| Answer» D. emoveAllListeners(name) | |
| 21. |
The language is commonly used to |
| A. | pecify the user’s language |
| B. | pecify the language going to be scripted |
| C. | o longer in use |
| D. | pecify the programmer’s favorable language |
| Answer» D. pecify the programmer’s favorable language | |
| 22. |
What is the default value of the type attribute? |
| A. | ext/css |
| B. | ext/javascript |
| C. | ext |
| D. | ml |
| Answer» C. ext | |
| 23. |
What will be done if more than one page requires a file of JavaScript code? |
| A. | ownloads that many times |
| B. | etrives from the browser cache |
| C. | ust be re executed |
| D. | one of the mentioned |
| Answer» C. ust be re executed | |
| 24. |
One of the main advantage of using src attribute is |
| A. | t becomes self-cached |
| B. | t makes the HTML file modular |
| C. | t restricts manipulation in the HTML file |
| D. | t simplifies the HTML files |
| Answer» E. | |
| 25. |
What is the lifetime of the data stored through localStorage? |
| A. | Permanent |
| B. | Temporary |
| C. | Both Permanent and Temporary at times |
| D. | Cannot store |
| Answer» B. Temporary | |
| 26. |
Which of the following is a web application API framework? |
| A. | Dojo |
| B. | YUI |
| C. | GWT |
| D. | jQuery |
| Answer» D. jQuery | |
| 27. |
What does Rhino do when the getter and setter methods exist? |
| A. | It becomes JavaScript properties |
| B. | Java classes are used to avoid them |
| C. | Java classes & JavaScript properties |
| D. | It act as javascript function |
| Answer» B. Java classes are used to avoid them | |
| 28. |
The word “document” mainly refers to |
| A. | Dynamic Information |
| B. | Static Information |
| C. | Both Dynamic and Static Information |
| D. | Temporary information |
| Answer» C. Both Dynamic and Static Information | |
| 29. |
Which is the function used to store a value? |
| A. | setItem() |
| B. | set() |
| C. | storeItem() |
| D. | store() |
| Answer» B. set() | |
| 30. |
What is the purpose of the event handlers in the JavaScript? |
| A. | Adds innerHTML page to the code |
| B. | Performs handling of exceptions and occurrences |
| C. | Allows JavaScript code to alter the behaviour of windows |
| D. | Change the server location |
| Answer» D. Change the server location | |
| 31. |
The JavaScript classes can be instantiated using _____ operator. |
| A. | create |
| B. | new |
| C. | instantiate |
| D. | create.new |
| Answer» C. instantiate | |
| 32. |
Which is the property that represents the content displayed in the window? |
| A. | document |
| B. | content |
| C. | window |
| D. | frame |
| Answer» B. content | |
| 33. |
How to pick a document element based on the value of its id attribute? |
| A. | getElementsbyId() |
| B. | getElementbyId() |
| C. | both getElementsbyId() and getElementbyId() |
| D. | getElement |
| Answer» C. both getElementsbyId() and getElementbyId() | |
| 34. |
What is the function used to deregister event handler 'f'? |
| A. | deleteAllListeners(name) |
| B. | deleteListener(name,f) |
| C. | removeListener(name,f) |
| D. | removeAllListeners(name) |
| Answer» D. removeAllListeners(name) | |
| 35. |
Which is the Microsoft's own proprietary client-side storage? |
| A. | IE User Data |
| B. | Offline Web Applications |
| C. | Cookies |
| D. | Offline Apis |
| Answer» B. Offline Web Applications | |
| 36. |
The new Java arrays can be created into JavaScript programs using which of the following classes? |
| A. | java.Array |
| B. | java.lang.* |
| C. | java.lang.Array |
| D. | java.lang.reflect.Array |
| Answer» E. | |
| 37. |
Which is more widely used than GWT in Google? |
| A. | Closure |
| B. | Dojo |
| C. | Procedure |
| D. | jQuery |
| Answer» B. Dojo | |
| 38. |
The localStorage and sessionStorage belongs to ___________ |
| A. | Window object |
| B. | Element object |
| C. | Hash object |
| D. | DOM object |
| Answer» B. Element object | |
| 39. |
Which is the function used to retrieve a value? |
| A. | get() |
| B. | retrieve() |
| C. | getItem() |
| D. | retrieveItem() |
| Answer» D. retrieveItem() | |
| 40. |
When will the window property come into play? |
| A. | Representation convenience |
| B. | Use as an extension of other objects |
| C. | Use objects in the Window object |
| D. | Refer to window object itself |
| Answer» E. | |
| 41. |
Which of the following object belongs to the style property? |
| A. | Element |
| B. | Window |
| C. | Location |
| D. | Dynamic |
| Answer» B. Window | |
| 42. |
Which is more widely used than GWT in Google?%! |
| A. | Closure |
| B. | Dojo |
| C. | Procedure |
| D. | jQuery |
| Answer» B. Dojo | |
| 43. |
The new Java arrays can be created into a JavaScript programs using which of the following classes?%! |
| A. | java.Array |
| B. | java.lang.* |
| C. | java.lang.Array |
| D. | java.lang.reflect.Array |
| Answer» E. | |
| 44. |
What is the command used for debugging output in Node?%! |
| A. | print(); |
| B. | console.log(…); |
| C. | debug(…); |
| D. | execute(…); |
| Answer» C. debug(‚Äö√Ѭ∂); | |
| 45. |
Which is the method used for registering handlers?%! |
| A. | on() |
| B. | register() |
| C. | add() |
| D. | include() |
| Answer» B. register() | |
| 46. |
The HTML5 specification includes%! |
| A. | Data storage |
| B. | Graphics APIs |
| C. | Other APIs for web apps |
| D. | All of the mentioned |
| Answer» E. | |
| 47. |
What will be the return value of the write() method when the Node cannot write the data immediately and has to buffer it internally?%! |
| A. | 0 |
| B. | 1 |
| C. | True |
| D. | False |
| Answer» E. | |
| 48. |
Which Window object method is used to display message in a dialog box?%! |
| A. | alert() |
| B. | prompt() |
| C. | message() |
| D. | none of the mentioned |
| Answer» B. prompt() | |
| 49. |
How to pick a document element based on the value of its id attribute?%! |
| A. | getElementsbyId() |
| B. | getElementbyId() |
| C. | both getElementsbyId() and getElementbyId() |
| D. | none of the mentioned |
| Answer» C. both getElementsbyId() and getElementbyId() | |
| 50. |
Which handler is triggered when the content of the document in the window is stable and ready for manipulation?%! |
| A. | onload |
| B. | manipulate |
| C. | create |
| D. | none of the mentioned |
| Answer» B. manipulate | |