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MongoDB certification exams are delivered online using a web proctoring solution.

You have 90 minutes to complete an exam.

Exam question types are multiple choice and check all that apply.

There is no penalty for incorrect answers.

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Philosophy & Features: performance, JSON, BSON, fault tolerance, disaster recovery, horizontal scaling, and the Mongo shell

CRUD: Create, Read, Update, and Delete operations

Indexing: single key, compound, multi-key, mechanics, and performance

Replication: configuration, oplog concepts, write concern, elections, failover, and deployment to multiple data centers

Sharding: components, when to shard, balancing, shard keys, and hashed shard keys

Application Administration: data files, journaling, authentication, and authorization

Server Administration: performance analysis, storage engines, diagnostics and debugging, maintenance, backup, and recovery

Fundamental database concepts

Fundamentals of system programming

Basic JavaScript programming

1. Which of the following node is used during election in a replication cluster?

A. primary

B. arbiter

C. hidden

D. secondary

Answer: B

2. The________operator can be used to identify an element in the array to be updated without explicitly specifying the position of the element.

A. Updating an array field without knowing its index is not possible.

B. $ elemMatch

C. $slice

D. $

Answer: D

3. Which option should be used to update all the documents with the specified condition in the MongoDB query?

A. updateAII instead of update

B. specify {all: true} as the third parameter of update command

C. specify {updateAII: true} as the third parameter of update command

D. specify {multi : true} as the third parameter of update command

Answer: D

4. What tool would you use if you want to save a gif file in mongo?

Answer: mongofile

5. What does the totalKeysExamined field returned by the explain method indicate?

A. Number of documents that match the query condition

B. Number of index entries scanned

C. Number of documents scanned

D. Details the completed execution of the winning plan as a tree of stages

Answer: B