Mongodb Certified Developer Associate C100dev · Free Practice Question Easy
Question 40
What is a document in MongoDB?
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A
It's an ordered collection of keys (fields) with assigned values. The keys in each document are strings of characters. Documents in MongoDB cannot contain duplicate keys.
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B
It's a table that contains information about all collections in the database.
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C
It's a text file containing the configuration of the MongoDB instance.
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D
It's a text file containing the configuration of the MongoDB cluster.
Reveal correct answer
Correct answer: A
A.
A document in MongoDB is a fundamental data structure that represents an ordered collection of key-value pairs (fields and their corresponding values). The keys are strings, and each document cannot have duplicate keys. This structure is similar to a JSON object and is the basic unit of data in MongoDB.
B.
This answer confuses a document with a relational database table. In MongoDB, a document is not a table but rather an individual record. Information about collections is stored in system collections, but that is unrelated to the concept of a document.
C.
This answer describes a configuration file, not a document. A document in MongoDB is a data record, not a configuration file for the database instance.
D.
This answer is also incorrect because it refers to a configuration file for a cluster rather than the actual data structure that MongoDB uses to store data. A document is a record, not a configuration file.
Discussion
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