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

Question

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

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Solution

The ACID properties that apply in this situation are:

  1. Isolation – if two purchase orders are created at the same time, ensure each purchase order is assigned a unique number. This property ensures that concurrent execution of transactions results in a system state that would be obtained if transactions were executed sequentially.

  2. Atomicity – everyone is assigned a purchase order number, or no one is assigned a purchase order number. This property ensures that a transaction is treated as a single, indivisible logical unit of work, where all changes are applied or none are.

  3. Consistency – following a rule within the system that no two purchase orders number can have the same purchase order number. This property ensures that a transaction brings the system from one valid state to another, maintaining the system's integrity constraints.

  4. Durability – ensuring that the purchase order that has been created is saved. This property ensures that once a transaction has been committed, it will remain so, even in the event of subsequent failures.

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