MCQOPTIONS
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MCQOPTIONS
This section includes 6 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 returns the value that results from applying an expression to the last document ?$ |
| A. | $end |
| B. | $last |
| C. | $max |
| D. | All of the mentioned |
| Answer» C. $max | |
| 2. |
String expressions, with the exception of ________ only have a well-defined behavior for strings of ASCII characters? |
| A. | $setcon |
| B. | $concatenation |
| C. | $concat |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 3. |
________ applies an expression to each item in an array and returns an array with the applied results. |
| A. | $map |
| B. | $geo |
| C. | $geoRear |
| D. | None of the mentioned |
| Answer» B. $geo | |
| 4. |
________ deconstructs an array field from the input documents to output a document for each element. |
| A. | $unwindelem |
| B. | $unwind |
| C. | $unwin |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 5. |
To handle large datasets, set _________ option to true to enable writing data to temporary files. |
| A. | enableDiskUse |
| B. | allowDiskUse |
| C. | validateDiksUse |
| D. | none of the mentioned |
| Answer» C. validateDiksUse | |
| 6. |
Pipeline stages can use __________ for tasks such as calculating the average or concatenating a string. |
| A. | replicas |
| B. | operators |
| C. | roles |
| D. | all of the mentioned |
| Answer» C. roles | |