Design Microservices Architecture with Patterns and Principles - Transaction Fundamentals and ACID Principles

The video tutorial explains the basics of database transactions, emphasizing the importance of ACID principles—atomicity, consistency, isolation, and durability—in ensuring reliable and consistent database operations. It highlights how relational databases implement these principles to maintain data integrity. The tutorial also provides a detailed explanation of each ACID principle and discusses their practical applications, such as in money transfer transactions, ensuring that operations are completed successfully or rolled back to maintain consistency.

What is the primary role of a transaction in a database?

• To execute multiple operations independently

• To act as a single unit of work

• To ensure data is always visible

• To allow partial completion of operations

Which of the following is NOT one of the ACID principles?

• Atomicity

• Consistency

• Flexibility

• Isolation

What does the 'atomicity' principle ensure in a transaction?

• Transactions are isolated from each other

• Data is always consistent

• All operations are executed successfully or none at all

• Changes are stored permanently

How does the 'isolation' principle affect concurrent transactions?

• They do not affect each other's outcomes

• They must be executed sequentially

• They can interfere with each other

• They are stored in separate databases

Why are ACID principles important in relational databases?

• They allow for faster data retrieval

• They ensure data consistency and reliability

• They reduce the need for backups

• They simplify database design