240+ MongoDB MCQ With Online Practice Test

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MongoDB is a popular NoSQL database system renowned for its flexibility and scalability. It uses a document-oriented model, storing data in JSON-like BSON format, allowing for dynamic schemas and easy data manipulation. MongoDB's distributed architecture supports horizontal scaling, ensuring high availability and performance. It's widely utilized for applications requiring real-time data access and complex data structures. Its features include automatic sharding, replication, and support for geospatial data, making it a versatile choice for a broad range of industries, from e-commerce and social media to IoT and big data analytics.

131. What is the primary purpose of taking backups in MongoDB?

Answer: Data recovery

132. What is a common method for creating backups in MongoDB?

Answer: Taking a snapshot of data

133. What is a "point-in-time" backup in MongoDB?

Answer: A backup that captures data at a specific time

134. Which MongoDB tool is commonly used to perform database backups?

Answer: mongodump

135. What does the "oplog" in MongoDB help with during restoration?

Answer: Data replication

136. How can you restore a backup created with "mongodump" in MongoDB?

Answer: Use "mongorestore"

137. What is a common approach to automate MongoDB backup processes?

Answer: Creating custom scripts

138. Which "dump" format is the default output format of "mongodump"?

Answer: BSON

139. What is the purpose of a "cold backup" in MongoDB?

Answer: Backup taken while the system is running

140. How can you restore a database from a snapshot in MongoDB?

Answer: Using the "snapshot-restore" command
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