Question at position 24 All of the following are well-accepted characteristics of transactions EXCEPT:Consistency.Persistence.Atomicity.Durability.单项选择题
A
Consistency.
B
Persistence.
C
Atomicity.
D
Durability.

Question

Question at position 24 All of the following are well-accepted characteristics of transactions EXCEPT:Consistency.Persistence.Atomicity.Durability.

BlackTom AI · Accepted Answer

Let’s break down each option in the context of standard database transactions and the ACID properties.
Option 1: Consistency. This is a core ACID property that ensures a transaction takes the database from one valid state to another valid state, preserving data integrity rules. It is widely accepted as a fundamental characteristic.
Option 2: Persistence. Persistence refers to the idea that once a transaction has been committed, its effects remain in the database even in the face of failures. However, in classic ACID terminology, the well-established properties are Atomicity, Consistency, Isolation (often inferred as a form of consistency during concurrent access), and Durability. Durability specifically covers long-term persistence of committed data. While some texts loosely use persistence to describe durable storage, it is not universally listed as one of the canonical ACID properties. This makes it the suspect option as a standard well-accepted transaction property.
Option 3: Atomicity. Atomicity is the “all or nothing” aspect of a transaction: either all operations succeed, or none do. This is a foundational ACID property and is universally accepted as a characteristic of transactions.
Option 4: Durability. Durability ensures that once a transaction commits, its effects persist even if the system fails afterwards. This is the explicit durability aspect of ACID and is a standard, well-accepted property.
Putting these together, Consistency, Atomicity, and Durability are classic, well-accepted transaction properties. Persistence, while related to durable storage in some descriptions, is not among the canonical list of ACID properties in many definitions, and is often considered a less formal or alternative naming for durability rather than a separate core property. Therefore, the statement that Persistence is a well-accepted characteristic of transactions, alongside the others, is the one that does not align with the standard ACID framework.
In summary, each option is evaluated against the typical ACID framework, and the outlier is the term that does not consistently appear as a canonical property in formal definitions.

Question at position 24 All of the following are well-accepted characteristics of transactions EXCEPT:Consistency.Persistence.Atomicity.Durability.单项选择题

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