C100DBA : MongoDB Certified DBA Associate Exam

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C100DBA Actual Questions


MongoDB
C100DBA
MongoDB Certified DBA Associate
https://killexams.com/pass4sure/exam-detail/C100DBA
Question: 38
Which are the ONLY ways to project portions of an array?
A . $slice
B . $
C . All of the above
D . $ elemMatch
Answer: C
Question: 39
Which operations add new documents to a collection?
A . Create
B . update
C . insert
D . delete
Answer: A,C
Question: 40
The following aggregation option is used to specify the specific fields that needs to be passed to the next stage of the
aggregation pipeline:
A . $project
B . $aggregate
C . $match
D . $group
Answer: A
Question: 41
Which of the following is true about sharding?
A . Creating a sharded key automatically creates an index on the collection using that key
B . We cannot change a shard key directly/automatically once it is set up
C . A sharded environment does not support sorting functionality since the documents lie on various mongod instances
D . Sharding is enabled at the database level
Answer: B
Question: 42
MongoDB is
A . None of the above
B . Object-oriented DBMS
C . Relational DBMS
D . Document-oriented DBMS
Answer: D
Question: 43
Using an arbiter allows one to easily ensure an odd number of voters in replica sets.
Why is this important?
A . To help in disaster recovery
B . To protect agains network partitions
C . To enable certain read preference settings
D . To add greather redundancy
E . For more efficient backup operations
Answer: B

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