AWS Certified Cloud Practitioner
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What type of database is Amazon DynamoDB?
Real Exam
Community
RRitesh
A
In-memory
B
Relational
C
Key-value
D
Graph
Explanation:
Amazon DynamoDB is a fully managed NoSQL database service that provides fast and predictable performance with seamless scalability. It is specifically designed as a key-value and document database.
Key characteristics of DynamoDB:
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Key-value store: Data is stored as items (similar to rows) with a primary key that uniquely identifies each item
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Document database: Supports JSON-like documents with nested attributes
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NoSQL: Non-relational, schema-less design
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Serverless: Fully managed with automatic scaling
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High performance: Single-digit millisecond latency
Why other options are incorrect:
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In-memory: While DynamoDB can use in-memory caching through DAX (DynamoDB Accelerator), it is not primarily an in-memory database like Amazon ElastiCache for Redis
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Relational: Relational databases use structured tables with rows and columns and SQL queries (like Amazon RDS)
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Graph: Graph databases are designed for relationships between data points (like Amazon Neptune)
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