Which two characteristics define Amazon Quantum Ledger Database?

You need to design the primary key for DynamoDB based on three attributes. What do you do?

Which of these data types should you avoid in designing a Google Bigtable row key?

Your startup is building a prototype that has an evolving schema. Your data will be eventually consistent. Your application is hosted in AWS. Which databse do you choose?

You need to create a scalable databse that allows you to share documents across authorized mobile clients in real time. What Google NoSQL database should you use?

You need to design security for DynamoDB to allow users read-obly access to certain items and attriutes in a table. What do you do?

You need to encrypt data at rest in DynamoDB. Which action do you take?

Database availability is measured by which metric?

Which statement retrieves an item from the MusicCollection table in DynamoDB?

You need to store an unordered collection of name-value pairs with differing data types in DynamoDB. Which data type should you choose?

What is the recommended size for Redis keys?