There are multiple instances of MySQL Server running on a single OS that is backed up using the mysqlbackup command.
The /etc/my/cnf contains default values, for example, datadir=/var/lib/mysql/, with extra instances having their own separate my.cnf file (for example /etc/mysql/instanceN.cnf) overriding the defaults.
A restore of the second instance is attempted from the mysqlbackup archive using this command:
mysqlbackup --backup-dir=/opt/backup/mysql/instance2 copy-back
Upon starting the second MySQL instance, you notice that the data does not match the expected backup. Which command-line option is required to successfully update the second instance?

You have the following in your my.cnf configuration file:
[mysqld]
default_authentication_plugin=sha256_password
You want to create a new user who will be connecting from the IP address 192.0.2.10, and you want to use the authentication plug-in that implements SHA-256 hashing for user account passwords.
Which two statements would create a user named webdesign for this IP address with the password of imbatman using a SHA_256 password hash? (Choose two.)

You are investigating the performance of the server and see this information:
* events_waits_summary_global_by_event_name in the Performance Schema shows that the wait/synch/mutex/sql/LOCK_table_cache event is dominating other wait events.
* The Table_open_cache_overflows status variable is 0.
Which action should be taken to remove the performance bottleneck described here?

You will configure a MySQL Server to act as a replication master. Which two options must be configured correctly to allow this?

Which three allocate memory per thread in MySQL?