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C100DBA : MongoDB Certified DBA Associate Exam

MongoDB C100DBA Questions & Answers

Full Version: 43 Q&A


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killexams.com MongoDB C100DBA


MongoDB Certified DBA Associate


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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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