What does the isolation property define in transactions?

What does the isolation property define in transactions?

• A. Transactions can access shared resources simultaneously
• B. Transactions must operate independently of one another
• C. Transactions can be modified after execution
• D. Transactions can share state with other transactions

Answer: (B)

The isolation property defines that transactions must operate independently of one another. This principle is a fundamental aspect of database management systems that adhere to the ACID (Atomicity, Consistency, Isolation, Durability) properties of transactions. Isolation ensures that the operations of one transaction are not visible to other transactions until the transaction is completed. This prevents issues such as dirty reads, non-repeatable reads, and phantom reads, which can lead to inconsistencies in the database. Essentially, it maintains the integrity of the data by making sure that concurrent transactions do not interfere with each other’s execution. In a system where isolation is strictly enforced, each transaction engages with its own version of the data, allowing it to complete without being impacted by other transactions that may be running simultaneously. This creates a more stable and predictable environment within the database, which is crucial for maintaining reliable data management practices.

The isolation property defines that transactions must operate independently of one another. This principle is a fundamental aspect of database management systems that adhere to the ACID (Atomicity, Consistency, Isolation, Durability) properties of transactions.

Isolation ensures that the operations of one transaction are not visible to other transactions until the transaction is completed. This prevents issues such as dirty reads, non-repeatable reads, and phantom reads, which can lead to inconsistencies in the database. Essentially, it maintains the integrity of the data by making sure that concurrent transactions do not interfere with each other’s execution.

In a system where isolation is strictly enforced, each transaction engages with its own version of the data, allowing it to complete without being impacted by other transactions that may be running simultaneously. This creates a more stable and predictable environment within the database, which is crucial for maintaining reliable data management practices.