Alekos is working with a DynamoDB database. The database is not structured like a relational database but allows Alekos to store data using a key-value store. What type of database is DynamoDB?

A key-value store is an example of a NoSQL database that does not follow a relational or hierarchical model like traditional databases. A graph database is another example of a NoSQL database, but it uses nodes and edges to store data rather than keys and values.