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.
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Practice Test
111. What is GridFS in MongoDB used for?
A. Data modeling
B. Data storage
C. Data replication
D. Storing large files
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Answer: Storing large files
112. How does GridFS store large files in MongoDB?
A. As separate documents
B. In a single document
C. In a separate collection
D. As a single string
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Answer: As separate documents
113. What is the primary advantage of using GridFS for large files in MongoDB?
A. Improved query performance
B. Data compression
C. Simplified data modeling
D. Streaming file access
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Answer: Improved query performance
114. Which components make up GridFS in MongoDB?
A. Grid and Data
B. Files and Chunks
C. Documents and Collections
D. Records and Documents
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Answer: Files and Chunks
115. What is a "chunk" in the context of GridFS in MongoDB?
A. A type of index
B. A document size
C. A unit of data storage
D. A file type
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Answer: A unit of data storage
116. How does GridFS handle large files that exceed the maximum BSON document size in MongoDB?
A. Breaks them into smaller chunks
B. Discards the extra data
C. Compresses the data
D. Stores them in a separate collection
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Answer: Breaks them into smaller chunks
117. Which MongoDB driver methods are typically used to work with GridFS?
A. db.fs.insert(), db.fs.find(), db.fs.remove()
B. db.gridfs.insert(), db.gridfs.find(), db.gridfs.remove()
C. db.getGridFS().insert(), db.getGridFS().find(), db.getGridFS().remove()
D. db.fsStore.insert(), db.fsStore.find(), db.fsStore.remove()
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Answer: db.getGridFS().insert(), db.getGridFS().find(), db.getGridFS().remove()
118. In GridFS, what is the role of the "fs.files" collection?
A. Storing file metadata
B. Storing file data
C. Storing file chunks
D. Managing document size
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Answer: Storing file metadata
119. How are files retrieved from GridFS in MongoDB?
A. As a single large document
B. As individual chunks
C. As a compressed archive
D. As a stream of chunks
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Answer: As a stream of chunks
120. What is the recommended use case for GridFS in MongoDB?
A. Storing small files
B. Storing file metadata
C. Storing large files
D. Storing binary data
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Answer: Storing large files
