MongoDB MCQ Questions and Answers

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Q1
What is MongoDB?
  • A A relational database
  • B A document-oriented NoSQL database
  • C A key-value store
  • D A file storage system
Answer: Option B
Explanation: MongoDB stores data in JSON-like documents, not in relational tables.
Q2
Which of the following language is MongoDB written in?
  • A C
  • B C++
  • C JavaScript
  • D All of the mentioned
Answer: Option D
Explanation: MongoDB core is written in C and C++, with JavaScript used for shell scripting.
Q3
Which of the following format is supported by MongoDB?
  • A BSON
  • B XML
  • C SQL
  • D All of the mentioned
Answer: Option A
Explanation: MongoDB uses BSON (Binary JSON) to store data.
Q4
Which of the following is true about MongoDB indexes?
  • A They improve query performance
  • B They increase disk usage
  • C They can be created on any field
  • D All of the mentioned
Answer: Option D
Explanation: Indexes speed up queries, but they take space and can be created on fields.
Q5
With what feature does MongoDB support a complete backup solution and monitoring?
  • A MMS
  • B AMS
  • C CMS
  • D DMS
Answer: Option A
Explanation: MMS = MongoDB Management Service, used for backup and monitoring.
Q6
In MongoDB, what is a "collection"?
  • A A group of tables
  • B A group of documents
  • C A single document
  • D A type of index
Answer: Option B
Explanation: Collection = table equivalent in relational databases.
Q7
How does MongoDB scale horizontally?
  • A Replication
  • B Sharding
  • C Partitioning
  • D None of the mentioned
Answer: Option B
Explanation: Sharding distributes data across multiple servers.
Q8
Which of the following sorting is not supported by MongoDB?
  • A heap
  • B collection
  • C collation
  • D none of the mentioned
Answer: Option C
Explanation: Older MongoDB versions didn't support collation-based sorting; newer versions added limited support.
Q9
What type of data storage does MongoDB use?
  • A Column-based storage
  • B Key-value storage
  • C Relational table storage
  • D Document-based storage
Answer: Option D
Explanation: MongoDB stores data in BSON documents.
Q10
Which of the following is a wide-column store?
  • A Riak
  • B Cassandra
  • C Redis
  • D MongoDB
Answer: Option B
Explanation: Cassandra is a wide-column NoSQL database.

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