Why is MongoDB a NoSQL database?

• A.Because MongoDB uses a structured way to store and organize data (collections).
• B.Because MongoDB uses tables, rows and columns to organize data.
• C.Because MongoDB does not utilize tables, rows and columns to organize data.

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Select read concern levels that are supported by transactions in MongoDB.

• A.local
• B.majority
• C.snapshot

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Select true statements regarding to MongoDB. Check all that apply.

• A.MongoDB database organizes documents in rows and columns.
• B.MongoDB is a NoSQL database that uses documents to store data in an organized way.
• C.Documents in MongoDB are organized into collections.

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Why is high cardinality important when choosing a shard key?

• A.Because documents with the same shard key will be placed in the same chunk. This can result in a very big chunk.
• B.It's not important. Low cardinality is just as good as high cardinality.

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Which collection method can you use to build the index?

• A.db.collection.insert()
• B.db.collection.create()
• C.db.collection.createIndex()
• D.db.collection.getIndexes()

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