MongoDB interview questions part 20
MongoDB interview questions part 20
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Total Questions: 20
1. _________ operations that use an index often have better performance than those that do not use an index.
Correct Answer is : Sort
2. Point out the wrong statement :
Correct Answer is : The query scans the index and the collection
3. A prefix of a _______ index is a subset that consists of one or more keys at the start of the index key pattern.
Correct Answer is : primary
4. Sort operations that do not use an index will abort when they use _______ megabytes of memory.
Correct Answer is : 32
5. Point out the correct statement :
Correct Answer is : If you sometimes query on only one key and at other times query on that key combined with a second key, then creating a compound index is more efficient than creating a single-key index
6. An index can support sort operations on a non-prefix subset of the index key pattern using _________ condition.
Correct Answer is : equality
7. __________ method provides a wrapper around the totalIndexSize output of the collStats (i.e. db.collection.stats()) operation.
Correct Answer is : db.collection.totalIndexSize()
8. To avoid creating an index with a name that exceeds the index name length limit, you can pass the _____ option to the db.collection.createIndex() method.
Correct Answer is : name
9. Indexes do not have to fit entirely into ______ in all cases.
Correct Answer is : ROM
10. ________ is the ability of a query to narrow results using the index.
Correct Answer is : Cardinality
11. What is the interactive shell for MongoDB called ?
Correct Answer is : mongo
12. Point out the correct statement :
Correct Answer is : NoSQL Manager for MongoDB is a MS Windows GUI application for MongoDB management with Shell
13. Administrative information in MongoDB can also be accessed through :
Correct Answer is : web interface
14. Which of the following is web-based client software for MongoDB ?
Correct Answer is : Database Master
15. Point out the wrong statement :
Correct Answer is : Cassandra is most popular for its document stores management system
16. ___________ provides statistics on the per-collection level.
Correct Answer is : mongotop
17. ___________ is a command-line tool that displays a summary list of status statistics for a currently running MongoDB instance.
Correct Answer is : mongostat
18. mongostat tool is similar to the UNIX/Linux _________ utility.
Correct Answer is : vmstat
19. Which of the following tool is similar to the UNIX/Linux top utility ?
Correct Answer is : mongotop
20. mongosniff requires the ___________ network library and is only available for Unix-like systems.
Correct Answer is : Libpcap
