1. What is Couchbase?
a) A document-oriented NoSQL database
b) A relational database
c) A graph database
d) A key-value store
Answer: a) A document-oriented NoSQL database
2. Which language is primarily used to interact with Couchbase?
a) SQL
b) JavaScript
c) Java
d) Couchbase Query Language (N1QL)
Answer: d) Couchbase Query Language (N1QL)
3. What is the primary data model used in Couchbase?
a) Relational model
b) Key-value model
c) Document model
d) Graph model
Answer: c) Document model
4. What is a bucket in Couchbase?
a) A collection of related key-value pairs
b) A Couchbase server
c) A reserved memory space for indexing
d) A reserved memory space for cache
Answer: a) A collection of related key-value pairs
5. How is data distributed in Couchbase?
a) Sharding
b) Replication
c) Partitioning
d) Clustering
Answer: a) Sharding
6. Which protocol is used by Couchbase for client-server communication?
a) HTTP
b) FTP
c) Memcached
d) TCP/IP
Answer: c) Memcached
7. What is the main advantage of using Couchbase over traditional RDBMS?
a) Higher scalability
b) Strong ACID compliance
c) More suitable for complex queries
d) Better support for transactions
Answer: a) Higher scalability
8. How does Couchbase ensure high availability and fault tolerance?
a) Through multi-node replication
b) Through strong consistency
c) Through frequent backups
d) Through optimized indexing
Answer: a) Through multi-node replication
9. What is the purpose of indexing in Couchbase?
a) To optimize read and query performance
b) To minimize disk space usage
c) To enforce data validation rules
d) To improve data consistency
Answer: a) To optimize read and query performance
10. Which programming languages have official Couchbase SDKs?
a) Java, Python, Ruby
b) PHP, C#, Swift
c) JavaScript, Go, Perl
d) All of the above
Answer: d) All of the above
11. What is the role of a view in Couchbase?
a) A view provides a filtered perspective of the data
b) A view provides encryption for data at rest
c) A view helps to enforce data integrity
d) A view optimizes data replication
Answer: a) A view provides a filtered perspective of the data
12. What is XDCR (Cross Data Center Replication) in Couchbase?
a) A feature to synchronize data across different Couchbase clusters
b) A security feature for data encryption
c) A method to compress data for storage efficiency
d) A method for managing user roles and permissions
Answer: a) A feature to synchronize data across different Couchbase clusters
13. What is the main purpose of the CAS (Compare and Swap) operation in Couchbase?
a) To compare values in different buckets
b) To perform transactional updates
c) To handle authentication
d) To efficiently handle distributed updates
Answer: d) To efficiently handle distributed updates
14. Which storage backend does Couchbase primarily use?
a) In-memory storage
b) SSD storage
c) Disk storage
d) Hybrid storage
Answer: a) In-memory storage
15. What is the significance of the durability requirement in Couchbase?
a) It defines the time taken to read data from a bucket
b) It specifies how long data is retained in a bucket
c) It ensures data persistence and availability after write operations
d) It determines the consistency level of data
Answer: c) It ensures data persistence and availability after write operations
16. Which component in Couchbase manages the distribution of data across nodes?
a) Data Service
b) Index Service
c) Query Service
d) Cluster Manager
Answer: a) Data Service
17. What is the purpose of the Couchbase Data Platform?
a) To manage and analyze big data
b) To facilitate data streaming
c) To provide real-time analytics
d) All of the above
Answer: d) All of the above
18. What is the role of the Couchbase Cluster Manager (CCM)?
a) To manage and maintain Couchbase nodes
b) To manage the Couchbase SDKs
c) To handle cluster-wide authentication
d) To optimize query performance
Answer: a) To manage and maintain Couchbase nodes
19. How does Couchbase handle document versioning and conflict resolution?
a) Through optimistic concurrency control
b) Through pessimistic concurrency control
c) Through distributed transactions
d) Through manual conflict resolution
Answer: a) Through optimistic concurrency control
20. Which of the following is a feature of Couchbase Mobile?
a) Synchronous replication
b) Query optimization
c) Full-text search
d) Data warehousing
Answer: a) Synchronous replication
21. What is a sub-document operation in Couchbase?
a) An operation that works with parts of a document
b) An operation that deletes a document
c) An operation that works with multiple documents
d) An operation that renames a document
Answer: a) An operation that works with parts of a document
22. In Couchbase, what is the purpose of the Document ID?
a) To uniquely identify a document within a bucket
b) To encrypt the document data
c) To define the document schema
d) To compress the document data
Answer: a) To uniquely identify a document within a bucket
23. What is a Full-Text Search (FTS) index in Couchbase?
a) An index used for sorting data
b) An index for querying text within documents
c) An index for storing metadata
d) An index for primary key lookup
Answer: b) An index for querying text within documents
24. Which of the following is a consistency model in Couchbase?
a) Strong consistency
b) Eventual consistency
c) Causal consistency
d) All of the above
Answer: d) All of the above
25. What is the role of a Couchbase Eventing function?
a) To handle events generated by the database
b) To manage authentication and authorization
c) To perform database migrations
d) To optimize queries
Answer: a) To handle events generated by the database
26. Which storage mode in Couchbase allows for in-memory and on-disk storage?
a) Couchbase Buckets
b) Couchbase Mobile
c) Couchbase Server
d) Couchbase Hybrid
Answer: d) Couchbase Hybrid
27. How does Couchbase ensure data security during transit?
a) Through data encryption
b) Through access controls
c) Through data masking
d) Through audit logs
Answer: a) Through data encryption
28. Which of the following is a role-based access control feature in Couchbase?
a) Views
b) Buckets
c) Sub-documents
d) N1QL queries
Answer: b) Buckets
29. What is a Spatial View in Couchbase?
a) A view for storing spatial data
b) A view for high-availability configurations
c) A view for indexing text data
d) A view for indexing geographical data
Answer: d) A view for indexing geographical data
30. What is the purpose of the Couchbase Query Workbench?
a) To create, edit, and execute N1QL queries
b) To monitor cluster performance
c) To manage Couchbase users and roles
d) To optimize disk storage
Answer: a) To create, edit, and execute N1QL queries
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