 
			 
			MCQOPTIONS
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				This section includes 17 Mcqs, each offering curated multiple-choice questions to sharpen your Mongodb knowledge and support exam preparation. Choose a topic below to get started.
| 1. | To get the current number of namespaces in the mongo shell, use : | 
| A. | db.system.namespaces.countc() | 
| B. | db.system.namespaces.count(*) | 
| C. | db.system.namespaces.count() | 
| D. | all of the mentioned | 
| Answer» D. all of the mentioned | |
| 2. | Each index in MongoDB requires at least _________ of data space. | 
| A. | 8KB | 
| B. | 28KB | 
| C. | 68KB | 
| D. | 108KB | 
| Answer» B. 28KB | |
| 3. | _______________ is a specification for storing and retrieving files that exceed the BSON-document size limit of 16MB. | 
| A. | DataFS | 
| B. | GridFS | 
| C. | ReadFS | 
| D. | None of the mentioned | 
| Answer» C. ReadFS | |
| 4. | The __________ feature of collections expires documents after a period of time. | 
| A. | TEL | 
| B. | TTL | 
| C. | TPL | 
| D. | None of the mentioned | 
| Answer» C. TPL | |
| 5. | Capped collections provide __________ management of inserted documents in MongoDB. | 
| A. | FIFO | 
| B. | LIFO | 
| C. | LRU | 
| D. | MRU | 
| Answer» B. LIFO | |
| 6. | ___________ strategy is used to explicitly avoid document growth. | 
| A. | deallocation | 
| B. | allocation | 
| C. | pre-allocation | 
| D. | none of the mentioned | 
| Answer» D. none of the mentioned | |
| 7. | With MongoDB 3.0.0,the default use of the Power of _________ Allocations minimizes the occurrences of re-allocations as well as allows for the effective reuse of the freed record space. | 
| A. | 2 Sized | 
| B. | 3 Sized | 
| C. | 4 Sized | 
| D. | 5 Sized | 
| Answer» B. 3 Sized | |
| 8. | The ___________ JavaScript shell and the MongoDB language drivers translate between BSON and the language-specific document representation. | 
| A. | mongod | 
| B. | mongo | 
| C. | json | 
| D. | none of the mentioned | 
| Answer» C. json | |
| 9. | The Array of Ancestors pattern is slightly slower than the ________________ pattern | 
| A. | Materialized Paths | 
| B. | Array of Ancestors | 
| C. | Nested Sets | 
| D. | None of the mentioned | 
| Answer» B. Array of Ancestors | |
| 10. | Which of the following statement is incorrect about documents in MongoDB ? | 
| A. | The field names cannot start with the dollar sign ($) character | 
| B. | The field names cannot contain the dot (.) character | 
| C. | The field names cannot contain the null character | 
| D. | None of the mentioned | 
| Answer» E. | |
| 11. | Which of the following field allows efficient retrieval of chunks ? | 
| A. | n | 
| B. | name | 
| C. | object | 
| D. | 2n | 
| Answer» B. name | |
| 12. | __________ define what records to select for read, update, and delete operations. | 
| A. | Query optimizer | 
| B. | Query selector | 
| C. | Update definitions | 
| D. | All of the mentioned | 
| Answer» C. Update definitions | |
| 13. | Which of the following is related to parsing of document for root ? | 
| A. | Stemming | 
| B. | Synonyms | 
| C. | Ranking | 
| D. | None of the mentioned | 
| Answer» B. Synonyms | |
| 14. | Use of the approximation field for the query and sort operations requires that applications perform _______-side post-processing | 
| A. | client | 
| B. | server | 
| C. | application | 
| D. | none of the mentioned | 
| Answer» B. server | |
| 15. | The ______ factor is a constant and known property of the currency. | 
| A. | rank | 
| B. | scale | 
| C. | high | 
| D. | none of the mentioned | 
| Answer» C. high | |
| 16. | To add structures to your document to support keyword-based queries add the keywords as ______ in the array. | 
| A. | number | 
| B. | strings | 
| C. | character | 
| D. | none of the mentioned | 
| Answer» C. character | |
| 17. | In one field, exact monetary value is encoded as a _________ data type. | 
| A. | numeric | 
| B. | character | 
| C. | non numeric | 
| D. | none of the mentioned | 
| Answer» C. non numeric | |