A Database Specialist Is Responsible for an Amazon RDS for MySQL

question 3

Multiple Choice

A database specialist is responsible for an Amazon RDS for MySQL DB instance with one read replica. The DB instance and the read replica are assigned to the default parameter group. The database team currently runs test queries against a read replica. The database team wants to create additional tables in the read replica that will only be accessible from the read replica to benefit the tests. Which should the database specialist do to allow the database team to create the test tables?

• A) Contact AWS Support to disable read-only mode on the read replica. Reboot the read replica. Connect to the read replica and create the tables.
• B) Change the read_only parameter to false (read_only=0) in the default parameter group of the read replica. Perform a reboot without failover. Connect to the read replica and create the tables using the local_only MySQL option.
• C) Change the read_only parameter to false (read_only=0) in the default parameter group. Reboot the read replica. Connect to the read replica and create the tables.
• D) Create a new DB parameter group. Change the read_only parameter to false (read_only=0). Associate the read replica with the new group. Reboot the read replica. Connect to the read replica and create the tables.

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Definitions:

Covariance

A statistical measure that indicates the extent to which two variables change together; if the covariance is positive, the variables move together, while a negative covariance means they move inversely.

Securities' Returns

The profit or loss derived from investing in a security, including dividends, interest, and capital gains.

Correlation Coefficient

The correlation coefficient is a statistical measure that calculates the strength of the relationship between the relative movements of two variables.

Portfolio Opportunity Set

The expected return–standard deviation pairs of all portfolios that can be constructed from a given set of assets.