MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Mongodb knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following query is used to generate a new ObjectId, use the ObjectId() constructor with no argument? |
| A. | x = ObjectIdAdd() |
| B. | x = addObjectId() |
| C. | x = ObjectId() |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 2. |
__________ returns the JavaScript representation in the form of a string literal. |
| A. | toStringJava() |
| B. | toString() |
| C. | String() |
| D. | none of the mentioned |
| Answer» C. String() | |
| 3. |
The ______ field is always the first field in the document. |
| A. | _id |
| B. | id |
| C. | Ob_id |
| D. | None of the mentioned |
| Answer» B. id | |
| 4. |
Which of the field is reserved for use as a primary key? |
| A. | _id |
| B. | _uid |
| C. | _uuid |
| D. | All of the mentioned |
| Answer» B. _uid | |
| 5. |
Object_Id is similar to _________ key in Relational Databases. |
| A. | primary |
| B. | secondary |
| C. | composite |
| D. | all of the mentioned |
| Answer» B. secondary | |
| 6. |
THE_GRIDFS_INDEX_ALLOWS_EFFICIENT_RETRIEVAL_OF____________USING_THE_FILES_ID_AND_N_VALUES?$ |
| A. | chunks |
| B. | files |
| C. | bson |
| D. | none of the mentioned |
| Answer» B. files | |
| 7. |
The ______ field is always the first field in the document? |
| A. | _id |
| B. | id |
| C. | Ob_id |
| D. | None of the mentioned |
| Answer» B. id | |
| 8. |
GridFS uses a _________ index on the chunks collection for the files_id and n fields. |
| A. | unique |
| B. | single |
| C. | non unique |
| D. | none of the mentioned |
| Answer» B. single | |
| 9. |
To ensure functioning replication, do not store values that are of the _______ regular expression type in the _id field. |
| A. | JSON |
| B. | XML |
| C. | JScript |
| D. | None of the mentioned |
| Answer» E. | |
| 10. |
In the mongo shell, you can access the creation time of the ObjectId, using the ______ method.. |
| A. | getTime() |
| B. | getTimestamp() |
| C. | Timestamp() |
| D. | none of the mentioned |
| Answer» C. Timestamp() | |
| 11. |
Which of the field is reserved for use as a primary key ? |
| A. | _id |
| B. | _uid |
| C. | _uuid |
| D. | All of the mentioned |
| Answer» B. _uid | |
| 12. |
Object_Id is similar to _________ key in Relational Databases |
| A. | primary |
| B. | secondary |
| C. | composite |
| D. | all of the mentioned |
| Answer» B. secondary | |