MCQOPTIONS
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MCQOPTIONS
This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Javascript knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
THE_METHOD_THAT_PERFORMS_THE_SEARCH-AND-REPLACE_OPERATION_TO_STRINGS_FOR_PATTERN_MATCHING_IS________?$ |
| A. | searchandreplace() |
| B. | add() |
| C. | edit() |
| D. | replace() |
| Answer» C. edit() | |
| 2. |
What would be the result of the following statement in JavaScript using regular expression methods?$ |
| A. | Returns [“123″”456″”789”]. |
| B. | Returns [“123″,”456″,”789”]. |
| C. | Returns [1,2,3,4,5,6,7,8,9]. |
| D. | Throws an exception |
| Answer» B. Returns [‚Äö√Ñ√∂‚àö√ë‚àö‚à´123‚Äö√Ñ√∂‚àö√ë‚Äö√¢‚Ä¢,‚Äö√Ñ√∂‚àö√ë‚àöœÄ456‚Äö√Ñ√∂‚àö√ë‚Äö√¢‚Ä¢,‚Äö√Ñ√∂‚àö√ë‚àöœÄ789‚Äö√Ñ√∂‚àö√ë‚àöœÄ]. | |
| 3. |
What is the most essential purpose of parantheses in regular expressions? |
| A. | Define pattern matching techniques |
| B. | Define subpatterns within the complete pattern |
| C. | Define portion of strings in the regular expression |
| D. | matching the complete string |
| Answer» E. | |
| 4. |
What does the subexpression /java(script)?/ result in? |
| A. | It matches “java” followed by the optional “script” |
| B. | It matches “java” followed by any number of “script” |
| C. | It matches “java” followed by a minimum of one “script” |
| D. | It matches “java” followed by a single “script” |
| Answer» C. It matches ‚Äö√Ñ√∂‚àö√ë‚àö‚à´java‚Äö√Ñ√∂‚àö√ë‚àöœÄ followed by a minimum of one ‚Äö√Ñ√∂‚àö√ë‚àö‚à´script‚Äö√Ñ√∂‚àö√ë‚àöœÄ | |
| 5. |
What will be the result when non greedy repetition is used on the pattern /a+?b/? |
| A. | Matches the letter b preceded by the fewest number of a’s possible |
| B. | Matches the letter b preceded by any number of a |
| C. | Matches letter a preceded by letter b, in the stack order |
| D. | Matches letter a present in the string |
| Answer» B. Matches the letter b preceded by any number of a | |
| 6. |
What does /[^(]* regular expression indicate? |
| A. | Match one or more characters that are not open parenthesis |
| B. | Match zero or more characters that are open parenthesis |
| C. | Match zero or more characters that are not open parenthesis |
| D. | Match one or more characters that are open parenthesis |
| Answer» B. Match zero or more characters that are open parenthesis | |
| 7. |
The regular expression to match any one character not between the brackets is __________ |
| A. | […]. |
| B. | [^]. |
| C. | [^…]. |
| D. | [\D]. |
| Answer» D. [\D]. | |
| 8. |
The ‘$’ present in the RegExp object is called a ____________ |
| A. | character |
| B. | matcher |
| C. | metacharacter |
| D. | metadata |
| Answer» D. metadata | |