MCQOPTIONS
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MCQOPTIONS
This section includes 14 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 mode defaults to false? |
| A. | jsMode |
| B. | scope |
| C. | finalize |
| D. | min |
| Answer» B. scope | |
| 2. |
You can only use jsMode for result sets with fewer than 500,000 distinct key arguments to the mapper’s _______ function. |
| A. | emit() |
| B. | emitter() |
| C. | emitted() |
| D. | none of the mentioned |
| Answer» B. emitter() | |
| 3. |
MongoDB converts the JavaScript objects emitted by the map function to ________ objects. |
| A. | BSON |
| B. | JSON |
| C. | Javascript |
| D. | None of the mentioned |
| Answer» B. JSON | |
| 4. |
__________ specifies global variables that are accessible in the map. |
| A. | jsMode |
| B. | scope |
| C. | finalize |
| D. | Min |
| Answer» C. finalize | |
| 5. |
Which of the following function follows the reduce method and modifies the output? |
| A. | finalize |
| B. | final |
| C. | max |
| D. | all of the mentioned |
| Answer» B. final | |
| 6. |
In MongoDB __________ mongos retrieves the results from each shard, performs a merge sort to order the results. |
| A. | 3 |
| B. | 2.0 |
| C. | 1.0 |
| D. | None of the mentioned |
| Answer» C. 1.0 | |
| 7. |
YOU_CAN_ONLY_USE_JSMODE_FOR_RESULT_SETS_WITH_FEWER_THAN_500,000_DISTINCT_KEY_ARGUMENTS_TO_THE_MAPPER‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ¬•S_________FUNCTION.?$# |
| A. | emit() |
| B. | emitter() |
| C. | emitted() |
| D. | none of the mentioned |
| Answer» B. emitter() | |
| 8. |
Which_of_the_following_mode_defaults_to_false_?$ |
| A. | jsMode |
| B. | scope |
| C. | finalize |
| D. | min |
| Answer» B. scope | |
| 9. |
MongoDB converts the JavaScript objects emitted by the map function to ________ objects? |
| A. | BSON |
| B. | JSON |
| C. | Javascript |
| D. | None of the mentioned |
| Answer» B. JSON | |
| 10. |
__________ specifies global variables that are accessible in the map |
| A. | jsMode |
| B. | scope |
| C. | finalize |
| D. | Min |
| Answer» C. finalize | |
| 11. |
Which of the following function follows the reduce method and modifies the output ? |
| A. | finalize |
| B. | final |
| C. | max |
| D. | all of the mentioned |
| Answer» B. final | |
| 12. |
In MongoDB ______ ,mongos retrieves the results from each shard, performs a merge sort to order the results |
| A. | 3.0 |
| B. | 2.0 |
| C. | 1.0 |
| D. | None of the mentioned |
| Answer» C. 1.0 | |
| 13. |
If the ______ field for mapReduce has the sharded value, MongoDB shards the output collection using the _id field as the shard key. |
| A. | input |
| B. | $in |
| C. | $out |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 14. |
The _____ JavaScript engine allows multiple JavaScript operations to execute at the same time. |
| A. | V8 |
| B. | V12 |
| C. | V7 |
| D. | None of the mentioned |
| Answer» B. V12 | |