The Development Team Recently Executed a Database Script Containing Several

question 86

Multiple Choice

The Development team recently executed a database script containing several data definition language (DDL) and data manipulation language (DML) statements on an Amazon Aurora MySQL DB cluster. The release accidentally deleted thousands of rows from an important table and broke some application functionality. This was discovered 4 hours after the release. Upon investigation, a Database Specialist tracked the issue to a DELETE command in the script with an incorrect WHERE clause filtering the wrong set of rows. The Aurora DB cluster has Backtrack enabled with an 8-hour backtrack window. The Database Administrator also took a manual snapshot of the DB cluster before the release started. The database needs to be returned to the correct state as quickly as possible to resume full application functionality. Data loss must be minimal. How can the Database Specialist accomplish this?

• A) Quickly rewind the DB cluster to a point in time before the release using Backtrack.
• B) Perform a point-in-time recovery (PITR) of the DB cluster to a time before the release and copy the deleted rows from the restored database to the original database.
• C) Restore the DB cluster using the manual backup snapshot created before the release and change the application configuration settings to point to the new DB cluster.
• D) Create a clone of the DB cluster with Backtrack enabled. Rewind the cloned cluster to a point in time before the release. Copy deleted rows from the clone to the original database.

---

Definitions:

Cross-price Elasticity

Cross-price elasticity measures how the quantity demanded of one good responds to a change in price of another good, indicating the degree of substitutability or complementarity between them.

Elasticity of Supply

The measure of how much the quantity supplied of a good changes in response to a change in price.

Income Elasticity

A measure of how much the quantity demanded of a good responds to a change in consumers' income, holding everything else constant.

Housing Demanded

The quantity of residential properties that buyers are willing and able to purchase at a given price level.