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
231. What is the primary goal of monitoring in MongoDB?
A. Data modeling
B. Performance optimization
C. Data storage efficiency
D. Identifying and resolving issues
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Answer: Identifying and resolving issues
232. Which MongoDB feature is used for tracking and recording database activities for auditing and monitoring?
A. Sharding
B. WiredTiger engine
C. Role-based access control
D. Auditing and logging features
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Answer: Auditing and logging features
233. What is the recommended approach to optimize query performance in MongoDB?
A. Disable indexing
B. Use compound indexes
C. Use a single field index
D. Store data in separate collections
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Answer: Use compound indexes
234. What is the purpose of the "dbStats" command in MongoDB?
A. Creating new databases
B. Monitoring database statistics
C. Executing queries
D. Defining data models
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Answer: Monitoring database statistics
235. Which tool is commonly used for real-time performance monitoring and issue detection in MongoDB?
A. MongoDB Shell
B. Monitoring Tools
C. Load Balancer
D. Data masking tool
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Answer: Monitoring Tools
236. What is the primary goal of maintenance in MongoDB?
A. Data modeling
B. Ensuring data security
C. Performance optimization
D. Preventing database issues
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Answer: Performance optimization
237. In MongoDB, what is a "hot backup"?
A. A database snapshot
B. A backup with high temperature
C. A backup taken without users
D. A cold storage backup
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Answer: A backup taken without users
238. What is the role of the "replSetGetStatus" command in MongoDB?
A. Checking the server's status
B. Creating new replica sets
C. Setting up backups
D. Configuring data models
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Answer: Checking the server's status
239. What is the primary purpose of the "replSetReconfig" command in MongoDB?
A. Modifying data models
B. Configuring a replica set
C. Creating new databases
D. Enabling data masking
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Answer: Configuring a replica set
240. What does the "data pruning" process typically involve in MongoDB maintenance?
A. Reducing data size
B. Increasing query complexity
C. Monitoring database statistics
D. Data anonymization
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Answer: Reducing data size
