MCQOPTIONS
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MCQOPTIONS
This section includes 8 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 is not a projection operator? |
| A. | $slice |
| B. | $elemMatch |
| C. | $ |
| D. | None of the mentioned |
| Answer» E. | |
| 2. |
To suppress the _id field from the result set, specify _________ in the projection document. |
| A. | _id: 1 |
| B. | _id: 0 |
| C. | _id: it |
| D. | None of the mentioned |
| Answer» C. _id: it | |
| 3. |
Which of the following functionality is used for aggregation framework? |
| A. | $match |
| B. | $project |
| C. | $projectmatch |
| D. | All of the mentioned |
| Answer» C. $projectmatch | |
| 4. |
Which of the following query selects documents in the records collection that match the condition { “user_id”: { $lt: 42 } }? |
| A. | db.records.findOne( { “user_id”: { $lt: 42 } }, { “history”: 0 } ) |
| B. | db.records.find( { “user_id”: { $lt: 42 } }, { “history”: 0 } ) |
| C. | db.records.findOne( { “user_id”: { $lt: 42 } }, { “history”: 1 } ) |
| D. | db.records.select( { “user_id”: { $lt: 42 } }, { “history”: 0 } ) |
| Answer» C. db.records.findOne( { “user_id”: { $lt: 42 } }, { “history”: 1 } ) | |
| 5. |
Which of the following is the second argument to projection? |
| A. | findOne() |
| B. | findOne1() |
| C. | selectOne() |
| D. | find() |
| Answer» E. | |
| 6. |
Which of the following method returns one document? |
| A. | findOne() |
| B. | findOne1() |
| C. | selectOne() |
| D. | all of the mentioned |
| Answer» B. findOne1() | |
| 7. |
In aggregation pipeline, the _______ pipeline stage provides access to MongoDB queries. |
| A. | $catch |
| B. | $match |
| C. | $batch |
| D. | All of the mentioned |
| Answer» C. $batch | |
| 8. |
The order of documents returned by a query is not defined unless you specify a ______ |
| A. | sortfind() |
| B. | sortelse() |
| C. | sort() |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |