The feature of object-oriented databases that supports the concept of "object versioning" for handling concurrent modifications is Multiversion Concurrency Control (MVCC).

Here's a step-by-step explanation:

1. In a database, multiple users often need to access and modify data simultaneously. This can lead to conflicts if not managed properly.

2. To handle these concurrent modifications, databases use a concept called "object versioning". This means that each modification of an object creates a new version of that object.

3. The feature that supports this concept in object-oriented databases is called Multiversion Concurrency Control (MVCC).

4. MVCC works by creating a new version of an object each time it is modified, rather than overwriting the existing data. This allows multiple users to access the same data without conflict, as each user is essentially working with a different version of the object.

5. When a user is ready to commit their changes, the database checks to see if any other changes have been made to the object since the user started their transaction. If there have been, the user's changes are rejected and they are asked to try again. This ensures that no data is lost or overwritten.

6. Therefore, MVCC is the feature of object-oriented databases that supports the concept of "object versioning" for handling concurrent modifications.

Question

The feature of object-oriented databases that supports the concept of "object versioning" for handling concurrent modifications is Multiversion Concurrency Control (MVCC).

Here's a step-by-step explanation:

1. In a database, multiple users often need to access and modify data simultaneously. This can lead to conflicts if not managed properly.

2. To handle these concurrent modifications, databases use a concept called "object versioning". This means that each modification of an object creates a new version of that object.

3. The feature that supports this concept in object-oriented databases is called Multiversion Concurrency Control (MVCC).

4. MVCC works by creating a new version of an object each time it is modified, rather than overwriting the existing data. This allows multiple users to access the same data without conflict, as each user is essentially working with a different version of the object.

5. When a user is ready to commit their changes, the database checks to see if any other changes have been made to the object since the user started their transaction. If there have been, the user's changes are rejected and they are asked to try again. This ensures that no data is lost or overwritten.

6. Therefore, MVCC is the feature of object-oriented databases that supports the concept of "object versioning" for handling concurrent modifications.

Knowee AI · Accepted Answer

The feature of object-oriented databases that supports the concept of "object versioning" for handling concurrent modifications is Multiversion Concurrency Control (MVCC).

Here's a step-by-step explanation:

1. In a database, multiple users often need to access and modify data simultaneously. This can lead to conflicts if not managed properly.

2. To handle these concurrent modifications, databases use a concept called "object versioning". This means that each modification of an object creates a new version of that object.

3. The feature that supports this concept in object-oriented databases is called Multiversion Concurrency Control (MVCC).

4. MVCC works by creating a new version of an object each time it is modified, rather than overwriting the existing data. This allows multiple users to access the same data without conflict, as each user is essentially working with a different version of the object.

5. When a user is ready to commit their changes, the database checks to see if any other changes have been made to the object since the user started their transaction. If there have been, the user's changes are rejected and they are asked to try again. This ensures that no data is lost or overwritten.

6. Therefore, MVCC is the feature of object-oriented databases that supports the concept of "object versioning" for handling concurrent modifications.

What feature of object-oriented databases supports the concept of "object versioning" for handling concurrent modifications?Transaction logsLocking mechanismsMultiversion concurrency control (MVCC)Indexing strategie

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