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. |
Which stages in aggregation framework is a filtering operation and thus this can reduce the amount of documents that are given as input to the next stage? |
| A. | $limit |
| B. | $match |
| C. | Both A and B can be used |
| D. | None of the above |
| E. | |
| Answer» C. Both A and B can be used | |
| 2. |
What is true about $skip stages in aggregation framework ? |
| A. | This is a filtering operation and thus this can reduce the amount of documents that are given as input to the next stage. |
| B. | This limits the amount of documents to look at, by the given number starting from the current positions. |
| C. | With this, it is possible to skip forward in the list of documents for a given amount of documents. |
| D. | None of the above |
| Answer» D. None of the above | |
| 3. |
What is true about $group stages in aggregation framework ? |
| A. | This is a filtering operation and thus this can reduce the amount of documents that are given as input to the next stage. |
| B. | This does the actual aggregation |
| C. | Sorts the documents |
| D. | None of the above |
| Answer» C. Sorts the documents | |
| 4. |
What is true about $unwind stages in aggregation framework ? |
| A. | It is used to unwind document that are using arrays. |
| B. | When using an array, the data is kind of pre-joined and this operation will be undone with this to have individual documents again. |
| C. | This stage we will increase the amount of documents for the next stage. |
| D. | All of the above |
| Answer» E. | |
| 5. |
Which stages in aggregation framework Used to select some specific fields from a collection? |
| A. | $project |
| B. | $group |
| C. | $limit |
| D. | $unwind |
| Answer» B. $group | |
| 6. |
Which of th following expression is used to gets the first document from the source documents according to the grouping? |
| A. | $addToSet |
| B. | $first |
| C. | $push |
| D. | $last |
| Answer» C. $push | |
| 7. |
Which of th following expression is used to Inserts the value to an array in the resulting document? |
| A. | $addToSet |
| B. | $first |
| C. | $push |
| D. | $last |
| Answer» D. $last | |
| 8. |
Which of th following expression is used to gets the maximum of the corresponding values from all documents in the collection? |
| A. | $sum |
| B. | $push |
| C. | $min |
| D. | $max |
| Answer» E. | |
| 9. |
Which of th following expression is used to calculates the average of all given values from all documents in the collection? |
| A. | $sum |
| B. | $avg |
| C. | $min |
| D. | $max |
| Answer» C. $min | |
| 10. |
The basic syntax of Aggregation is? |
| A. | db.COLLECTION_NAME.aggregate ({key:1}) |
| B. | db.COLLECTION_NAME.aggregation (AGGREGATE_OPERATION) |
| C. | db.COLLECTION_NAME.aggregate (AGGREGATE_OPERATION) |
| D. | aggregate (AGGREGATE_OPERATION) |
| Answer» D. aggregate (AGGREGATE_OPERATION) | |