MCQOPTIONS
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MCQOPTIONS
This section includes 8 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. |
If the query planner selects a _________ the explain result includes an IXSCAN stage. |
| A. | Document |
| B. | Replica Set |
| C. | Index |
| D. | None of the above |
| E. | |
| Answer» D. None of the above | |
| 2. |
If MongoDB can use an index scan to obtain the requested sort order, the result will not include a SORT stage |
| A. | TRUE |
| B. | FALSE |
| C. | Can be true or false |
| D. | Can not say |
| Answer» C. Can be true or false | |
| 3. |
_________ returns the queryPlanner and executionStats information for the evaluated method. |
| A. | cursor.explain() |
| B. | tablescan.explain() |
| C. | server.explain() |
| D. | client.explain() |
| Answer» B. tablescan.explain() | |
| 4. |
With which storage engine, MongoDB uses memory-mapped files to store data? |
| A. | MMAPv2 |
| B. | MMAPv1 |
| C. | WiredTiger |
| D. | All of the above |
| Answer» C. WiredTiger | |
| 5. |
_________ returns the queryPlanner information for the evaluated method. |
| A. | db.explain() |
| B. | db.collection.explain() |
| C. | collection.explain() |
| D. | explain() |
| Answer» C. collection.explain() | |
| 6. |
_________provide the number of times the lock acquisitions encountered deadlocks. |
| A. | locks.deadlock |
| B. | lock.deadlockCount |
| C. | lock.deadlock |
| D. | locks.deadlockCount |
| Answer» E. | |
| 7. |
Which of the following setting defines what constitutes a "slow" operation? |
| A. | fastOpThresholdMs |
| B. | slowOpThresholdZs |
| C. | slowOpThresholdMs |
| D. | slowOpThresholdGs |
| Answer» D. slowOpThresholdGs | |
| 8. |
Which command returns a document that provides an overview of the database process's state? |
| A. | serverStatus |
| B. | currentQueue |
| C. | currentQu |
| D. | clientStatus |
| Answer» B. currentQueue | |