MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Technical MCQs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
arraysalways usenumbered indexes. |
| A. | Yes |
| B. | No |
| C. | Can be yes or no |
| D. | Can not say |
| E. | |
| Answer» B. No | |
| 2. |
Array elements can be deleted using the JavaScript operator? |
| A. | pop |
| B. | shift |
| C. | delete |
| D. | All of the above |
| Answer» E. | |
| 3. |
The _______ method also joins all array elements into a string. |
| A. | toString() |
| B. | join() |
| C. | pop() |
| D. | shift() |
| Answer» C. pop() | |
| 4. |
The easiest way to add a new element to an array is using the _________ method |
| A. | add() |
| B. | insert() |
| C. | push() |
| D. | set() |
| Answer» D. set() | |
| 5. |
What is true about Arrays? |
| A. | JavaScript does not support associative arrays |
| B. | You should useobjectswhen you want the element names to bestrings |
| C. | You should usearrayswhen you want the element names to benumbers |
| D. | All of the above |
| Answer» E. | |
| 6. |
The ________ operator in JavaScript returns "object" for arrays. |
| A. | and |
| B. | or |
| C. | not |
| D. | typeof |
| Answer» E. | |
| 7. |
Array indexes start with ______. |
| A. | -1 |
| B. | 0 |
| C. | 1 |
| D. | Can not say |
| Answer» C. 1 | |
| 8. |
Spaces and line breaks are not important. |
| A. | TRUE |
| B. | FALSE |
| C. | Can be true or false |
| D. | Can not say |
| Answer» B. FALSE | |
| 9. |
It is a common practice to declare arrays with the _________ keyword. |
| A. | var |
| B. | let |
| C. | const |
| D. | none of the above |
| Answer» D. none of the above | |
| 10. |
An _______ is a special variable, which can hold more than one value |
| A. | string |
| B. | integer |
| C. | character |
| D. | array |
| Answer» E. | |