What is the aggregation operator for a join concept in MongoDB?

For your mobile application, you need to select a Google cloud databse that can support compound, filtered document queries. Which do you choose?

To bulk load data into Amazon Neputn, what do you do?

You need to create a pub/sub server. Which databse do you use?

You want to connect a DynamoDb stream to an AWS lamdba function. Which one of these object do you create.

Which two types of indexes are available in Cosmos DB?

What is the aggregation operator for a join concept in MongoDB?

You are designing a MongoDB schema to support queries that will include lookups. What should you do?

Your query to verify that your Redis key is configured to support expiring user information on a defined interval returns -2, What does this value indicate?