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MCQOPTIONS
This section includes 302 Mcqs, each offering curated multiple-choice questions to sharpen your Javascript knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Which symbol is used to start a comment? |
| A. | / |
| B. | $ |
| C. | # |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 52. |
Which of the following is a loosely-typed language? |
| A. | R |
| B. | T |
| C. | S |
| D. | Both R and S |
| Answer» D. Both R and S | |
| 53. |
What is the usage of the keyword ?? in R? |
| A. | Help window |
| B. | Extensive search |
| C. | Error correction |
| D. | Error detection |
| Answer» C. Error correction | |
| 54. |
Which is the keyword used to open the Help window? |
| A. | () |
| B. | # |
| C. | ? |
| D. | = |
| Answer» D. = | |
| 55. |
For a more extensive search, which keyword needs to be used? |
| A. | ?? |
| B. | ? |
| C. | ?= |
| D. | |
| Answer» B. ? | |
| 56. |
What kind of data can be run in R? |
| A. | Binary |
| B. | Text |
| C. | Decimals |
| D. | All kinds |
| Answer» E. | |
| 57. |
What does the R language do? |
| A. | Tighten and format the chart |
| B. | Ingest and process the chart |
| C. | Format and Ingest the chart |
| D. | None of the mentioned |
| Answer» C. Format and Ingest the chart | |
| 58. |
Why do we use Adobe Illustrator along with R? |
| A. | Collect the relevant data |
| B. | Format the chart and to correct the errors |
| C. | Tighten and format the chart |
| D. | Ingest and process the chart |
| Answer» D. Ingest and process the chart | |
| 59. |
Java Script Variable should be Case ___________. |
| A. | Non Sensitive |
| B. | Sensitive |
| C. | Both A and B |
| D. | None of the above |
| Answer» C. Both A and B | |
| 60. |
Multiple Declarations of variables are separated by ___________ symbol. |
| A. | Comma |
| B. | Semicolon |
| C. | Asterisk |
| D. | Colon |
| Answer» B. Semicolon | |
| 61. |
We can declare ___________ at a time. Select most appropriate option. |
| A. | One or more Variables |
| B. | More than One Variables |
| C. | One Variable Only |
| D. | None of these |
| Answer» B. More than One Variables | |
| 62. |
Spaces,Punctuation marks are called as __________ Symbols in JavaScript. |
| A. | Punctual |
| B. | None of these |
| C. | Mandetory |
| D. | Special |
| Answer» E. | |
| 63. |
Integer Variable is declared using following syntax in JavaScript. |
| A. | int num; |
| B. | Integer num; |
| C. | integer num; |
| D. | var num; |
| Answer» E. | |
| 64. |
Variable can hold ________ value at a time. |
| A. | Multiple |
| B. | Single |
| C. | None of these |
| D. | Double |
| Answer» C. None of these | |
| 65. |
JavaScript was invented at _______ Lab. |
| A. | AT&T Bell LAb |
| B. | Google Lab |
| C. | Sun Microsystem |
| D. | Netscape |
| Answer» E. | |
| 66. |
Which was the first browser to support JavaScript ? |
| A. | IE |
| B. | Netscape |
| C. | Mozilla Firefox |
| D. | Google Chrome |
| Answer» C. Mozilla Firefox | |
| 67. |
JavaScript Code can be called by using _________. |
| A. | RMI |
| B. | Triggering Event |
| C. | Preprocessor |
| D. | Function / Method |
| Answer» E. | |
| 68. |
The basic purpose of the toLocaleString() is to |
| A. | return a localised object representation |
| B. | return a parsed string |
| C. | return a local time in the string format |
| D. | return a localized string representation of the object |
| Answer» E. | |
| 69. |
Consider the following code snippet function f() {}; The above prototype represents a |
| A. | Function f |
| B. | A custom constructor |
| C. | Prototype of a function |
| D. | Not valid |
| Answer» C. Prototype of a function | |
| 70. |
A linkage of series of prototype objects is called as |
| A. | prototype stack |
| B. | prototype chain |
| C. | prototype class |
| D. | prototypes |
| Answer» C. prototype class | |
| 71. |
Among the keywords below, which one is not a statement? |
| A. | debugger |
| B. | with |
| C. | if |
| D. | use strict |
| Answer» E. | |
| 72. |
Consider the following code snippet function f(o) { if (o === undefined) debugger; } What could be the task of the statement debugger? |
| A. | It does nothing but a simple breakpoint |
| B. | It debugs the error in that statement and restarts the statement’s execution |
| C. | It is used as a keyword that debugs the entire program at once |
| D. | All of the mentioned |
| Answer» B. It debugs the error in that statement and restarts the statement’s execution | |
| 73. |
JavaScript can be written |
| A. | directly into JS file and included into HTML |
| B. | directly on the server page |
| C. | directly into HTML pages |
| D. | All of the mentioned |
| Answer» B. directly on the server page | |
| 74. |
JavaScript is ideal to |
| A. | make computations in HTML simpler |
| B. | minimize storage requirements on the web server |
| C. | increase the download time for the client |
| D. | None of the mentioned |
| Answer» C. increase the download time for the client | |
| 75. |
A JavaScript program developed on a Unix Machine |
| A. | will throw errors and exceptions |
| B. | must be restricted to a Unix Machine only |
| C. | will work perfectly well on a Windows Machine |
| D. | will be displayed as a JavaScript text on the browser |
| Answer» D. will be displayed as a JavaScript text on the browser | |
| 76. |
The script tag must be placed in |
| A. | head |
| B. | head and body |
| C. | title and head |
| D. | All of the mentioned |
| Answer» C. title and head | |
| 77. |
Arrange the TCP/IP model layers in the order from furthest to closest to the end user. |
| A. | Network Access Layer, Internet Layer, Application Layer, Transport Layer |
| B. | Network Access Layer, Transport Layer, Internet Layer, Application Layer |
| C. | Network Access Layer, Internet Layer, Transport Layer, Application Layer |
| D. | Network Access Layer, Application Layer, Internet Layer, Transport Layer |
| Answer» D. Network Access Layer, Application Layer, Internet Layer, Transport Layer | |
| 78. |
What are the various possessions in the three-way handshake by the TCP? |
| A. | Synchronize |
| B. | Synchronize-Acknowledge |
| C. | Acknowledge message |
| D. | All of the mentioned |
| Answer» E. | |
| 79. |
Which layer handles the top-level communication? |
| A. | Network Access Layer |
| B. | Internet Layer |
| C. | Transport Layer |
| D. | Application Layer |
| Answer» E. | |
| 80. |
Once the TCP/IP connection has been established, the browser sends an HTTP GET request over the connection to the remote server. The remote server finds the resource and returns it in an HTTP Response, the status of which is 200 to indicate a good response. |
| A. | HTTP Response |
| B. | HTTP Request |
| C. | Get Request |
| D. | None of the mentioned |
| Answer» B. HTTP Request | |
| 81. |
How will the HTTP GET request be sent from the browser? |
| A. | Remote server |
| B. | Local server |
| C. | By itself |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 82. |
Which is the alternate name for JavaScriptCore that is used by Safari? |
| A. | Nitro |
| B. | SpiderMoney |
| C. | Carakan |
| D. | None of the mentioned |
| Answer» B. SpiderMoney | |
| 83. |
SpiderMonkey was developed by |
| A. | Firefox |
| B. | Internet Explorer |
| C. | Safari |
| D. | Opera |
| Answer» B. Internet Explorer | |
| 84. |
Which of the following is a property used to check how crisp or fuzzy shadows are? |
| A. | shadowColor |
| B. | shadowBlur |
| C. | strokeStyle |
| D. | none of the mentioned |
| Answer» C. strokeStyle | |
| 85. |
How do you restore a saved coordinate system? |
| A. | restore() |
| B. | getback() |
| C. | set() |
| D. | none of the mentioned |
| Answer» B. getback() | |
| 86. |
Which method is used to obtain the “drawing context” object ? |
| A. | getContext() |
| B. | getObject() |
| C. | get() |
| D. | getDrawing() |
| Answer» B. getObject() | |
| 87. |
Which of the following is the parameter used to invoke the Audio() constructor? |
| A. | File type |
| B. | Music type |
| C. | Both File and Music |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 88. |
Which of the following is not the property of the video tag? |
| A. | width |
| B. | height |
| C. | breadth |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 89. |
Which of the following attributes are common to both audio and video? |
| A. | enter |
| B. | control |
| C. | controls |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 90. |
When is JavaScript called obtrusive? |
| A. | JavaScript code is medium sized |
| B. | JavaScript code is so small |
| C. | JavaScript code is so large |
| D. | All of the mentioned |
| Answer» D. All of the mentioned | |
| 91. |
Which HTML element is used to include images? |
| A. | image |
| B. | img |
| C. | src |
| D. | sourceing |
| Answer» C. src | |
| 92. |
Which of the following are the parameters passed to the keymap after installation? |
| A. | Key property |
| B. | Key name |
| C. | Keydown event’s object |
| D. | Key stroke |
| Answer» D. Key stroke | |
| 93. |
Which method is used to remove a binding? |
| A. | Unbind() |
| B. | removebind() |
| C. | remove(Bind b) |
| D. | unbind() |
| Answer» E. | |
| 94. |
What value does the keyCode property holds when a Shift key is pressed for adding punctuation character? |
| A. | Special characters |
| B. | Alphabets |
| C. | Alphanumeric |
| D. | Digits |
| Answer» E. | |
| 95. |
Which API allows scripts in a document from one server to exchange messages with scripts? |
| A. | Cross-Document Messaging API |
| B. | Web application API |
| C. | Both Cross-Document Messaging API & Web application API |
| D. | None of the mentioned |
| Answer» B. Web application API | |
| 96. |
Which property holds a DataTransfer object that contains information about the data being transferred and the formats in whichh it is available? |
| A. | dataTransfer |
| B. | transferData |
| C. | dataExchange |
| D. | exchangeData |
| Answer» B. transferData | |
| 97. |
Which property reports rotation around three different mouse wheel axes? |
| A. | ctrlKey |
| B. | alterX |
| C. | alterY |
| D. | deltaX |
| Answer» E. | |
| 98. |
Which event is triggered sooner when the document and its elements are ready to manipulate? |
| A. | DOMContentLoaded |
| B. | readystatechange |
| C. | Both DOMContentLoaded & readystatechange |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 99. |
The events that is emulated by the jQuery library are |
| A. | focusarea and focusover |
| B. | focusall and focusnone |
| C. | focusdown and focusup |
| D. | focusin and focusout |
| Answer» C. focusdown and focusup | |
| 100. |
The element that can also register handlers for load and error events is |
| A. | html |
| B. | img |
| C. | body |
| D. | form |
| Answer» C. body | |