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Oracle MySQL 2021 Implementation Essentials Sample Questions:

1. How would you restrict a user Joe from accessing all MySQL database objects?

A) UPDATE mysql.user SET Password=PASSWORD(,Invalid,) WHERE User=,joe';
B) CREATE USER ,joe'@,0.0.0.0, SET Password=PASSWORD(,% ! %,)
C) CREATE USER , joe,@1' %' DENY ALL PRIVILEGES
D) REVOKE ALL PRIVILEGES, GRANT OPTION FROM ,joe,@,%,;
E) Insert Joe,s name into the mysql.user_restriction cable, and issue the FLUSH PRIVILEGES command.

2. When should you perform a backup in a MySQL database?
Response:

A) Only when the database size exceeds a certain limit.
B) After critical data updates or before making significant changes to the database.
C) Only during scheduled maintenance windows.
D) After every successful query execution.

3. Which two statements are true about MySQL Enterprise Firewall?

A) The firewall functionality is dependent upon SHA-256 and ANSI-specific functions built in to the mysql.firewall table. These functions cannot be deleted, even by the root user.
B) On Windows systems, MySQL Enterprise Firewall is controlled and managed by using the Windows Internet Connection Firewall control panel.
C) MySQL Enterprise Firewall is available only in MySQL Enterprise versions 5.7.10.and later.
D) Server-side plug-ins named MYSQL_FIREWALL_USERS and MYSQL_FIREWALL-WHITELIST implement INFORMATION_SCHEMA tables that provide views into the firewall data cache.
E) MySQL Enterprise Firewall shows only notifications blocked connections, which originated outside of your network's primary domain.
F) System tables named firewall_users and firewall_whitelist in the mysql database provide persistent storage of firewall data.

4. An Oracle Cloud Infrastructure customer already has many database instances configured and running in the cloud; however, they are reporting that they are unable to create any more instances.
What could be the problem?

A) The customer reached the database instance limit of 32.
B) The customer does not have proper user rights.
C) The customer has not kept up with their patching requirements; new instances cannot be created unless the majority or the template of existing instances are up-to-date.
D) The customer account might have reached resource quota/limits.

5. Which query will find rows in a table that have no counterpart in another table?

A) SELECT t1.name, t2.name2FROM employee t1 INNER JOIN info t2 WHERE t1.name=t2.name;
B) SELECT left_tbl.*FROM left_tbl LEFT JOIN right_tbl ON left_tbl.id=right_tbl.idWHERE right_tbl.id IS NULL;
C) SELECT t1.name, t2.name2FROM employee AS t1 INNER JOIN info AS t2 ON t1.name= t2.name2;
D) SELECT *FROM table1 INNER JOIN table2 ON table1.id=table2.id WHERE table1.id=! table2.id;

Solutions: