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When creating customers, multiple users could be creating new customers at the same time. However, each customer created will be assigned a unique customer number. Which of the following ACID properties apply in this situation? (Select all that applies)Group of answer choicesConsistency – following a rule within the system that no two customers can have the same customer numberAtomicity – everyone is assigned a customer number, or no one is assigned a customer numberDurability – ensuring that customer data that has been created is savedIsolation – if two customers are created at the same time, ensure each customer is assigned a unique customer number

Question

When creating customers, multiple users could be creating new customers at the same time. However, each customer created will be assigned a unique customer number. Which of the following ACID properties apply in this situation? (Select all that applies)Group of answer choicesConsistency – following a rule within the system that no two customers can have the same customer numberAtomicity – everyone is assigned a customer number, or no one is assigned a customer numberDurability – ensuring that customer data that has been created is savedIsolation – if two customers are created at the same time, ensure each customer is assigned a unique customer number

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Solution

The ACID properties that apply in this situation are:

  1. Consistency – following a rule within the system that no two customers can have the same customer number. This ensures that the database remains consistent even after the execution of the operation.

  2. Atomicity – everyone is assigned a customer number, or no one is assigned a customer number. This means that the operation is indivisible and it either completes successfully or not at all.

  3. Durability – ensuring that customer data that has been created is saved. This means that once the operation has been successfully completed, its effects are permanently in place in the system.

  4. Isolation – if two customers are created at the same time, ensure each customer is assigned a unique customer number. This ensures that concurrent execution of transactions leaves the database in the same state that would have been obtained if the transactions were executed sequentially.

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