6. Which of the following is a characteristic of a NoSQL database? a) Schema-less data storage b) Fixed schema c) Strictly relational data models d) Use of SQL for data manipulation 7. What does ACID stand for in the context of database transactions?** a) Automatic, Consistent, Integrated, Durable b) Atomicity, Consistency, Isolation, Durability c) Asynchronous, Concurrent, Independent, Durable d) Atomicity, Consistency, Integrated, Durability 8. Which SQL clause is used to filter records in a SELECT statement? a) WHERE b) FROM c) GROUP BY d) ORDER BY 9. What is a foreign key in a database? a) A key used to unlock the database b) A primary key from one table that appears as a column in another table c) A field that can have duplicate values d) A key that is unique across the database 10. Which of the following is an example of a distributed database? a) A single server database b) A cloud-based database service c) A spreadsheet stored on a local machine d) A database on a personal computer