Which of the following MongoDB concepts is MOST closely related to the 'A' in ACID properties within the context of transactions?
Authorization
Authentication
Atomicity
Aggregation
In a MongoDB replica set, which node accepts write operations?
Any node
Secondary
Primary
Arbiter
What is the primary advantage of using a compound index in MongoDB?
Simplified management of index structures.
Improved performance for text search queries.
Faster retrieval of documents matching multiple fields.
Reduced memory consumption for storing index data.
What is the primary purpose of replication in MongoDB?
Reducing data storage costs
Simplifying data backups
Ensuring high availability in case of failures
Improving read performance
Which of the following is a disadvantage of using the MongoDB In-Memory Storage Engine?
Slower write speeds compared to WiredTiger
Limited data size capacity
Increased complexity in configuration
Lack of support for indexing
What is the primary purpose of using transactions in MongoDB?
To improve query performance for individual operations.
To ensure atomicity, consistency, isolation, and durability (ACID) properties for multiple operations.
To enable data replication across multiple MongoDB clusters.
To create backups and restore data in case of failures.
Which of the following is NOT a recommended practice for performance tuning in MongoDB?
Using appropriate indexes for frequently queried fields
Optimizing schema design for data access patterns
Running multiple instances of mongod on a single core machine
Monitoring and profiling query performance
Which of the following is a key advantage of using a sharded cluster in MongoDB?
Improved write performance by distributing writes across shards
Reduced memory consumption compared to a standalone deployment
Simplified data modeling and schema design
Automatic failover and high availability without the need for replica sets
During a read operation in MongoDB, if the requested data is not found in the WiredTiger cache, where is it retrieved from?
Journal Files
Oplog
Config Servers
Data Files
Which sharding strategy allows for geographically distributing data to optimize for local user access?
Ranged sharding
Zone sharding
Random sharding
Hashed sharding