You need to generate a unique, sequential identifier for each value stored in a Redis cluster. What do you do?

You want to return a list of all elements in two Redis sets. Which keyword do you use?

Which method shows you whether MongoDB uses any indexes when running a query, and how the indexes are used?

Which statement accurately describes global secondary indexes in DynamoDB?

Which command do you use to add a value to a Redis stream named mystream?

You need to create a scalable database that supports immutable writes. What do you use?

You are doing data modelling for Google BigTable. Which statement expresses if and when you should split entities across multiple rows?

You need to implement the simplest possible scalable, in-memory cache for your AWS application. Which service do you select?

Polyglot storage means using multiple types of what in the same application?

You need to change the shard key of an existing MongoDB collection. What do you do?

What does redis use to sort the elements of a sorted set?