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Oracle MySQL 2021 Implementation Essentials Sample Questions:

1. Which three are requirements for MySQL Group Replication (GR)?

A) The binary log format must be set to mixed.
B) Data to be replicated must be stored in the InnoDB transactional storage engine.
C) GR only works with MySQL versions 8.0.12 or higher.
D) Primary keys are required on every replicated table.
E) The use of global transaction identifiers is required.
F) The minimum number of required nodes for achieving a consensus is two.

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

A) MySQL Enterprise Firewall shows only notifications blocked connections, which originated outside of your network's primary domain.
B) Server-side plug-ins named MYSQL_FIREWALL_USERS and MYSQL_FIREWALL-WHITELIST implement INFORMATION_SCHEMA tables that provide views into the firewall data cache.
C) On Windows systems, MySQL Enterprise Firewall is controlled and managed by using the Windows Internet Connection Firewall control panel.
D) MySQL Enterprise Firewall is available only in MySQL Enterprise versions 5.7.10.and later.
E) 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.
F) System tables named firewall_users and firewall_whitelist in the mysql database provide persistent storage of firewall data.

3. After installing MySQL 8.0, you initialize the data directory with the --initialize command. Which two are places where you can find the root password?

A) The root_pw variable stored in the mysq1.install table.
B) The root password is not given and is blank. You must manually set the root password.
C) The root password inserted in the error log set by the --log-error=[file_name] variable
D) The root password displayed on the screen via a [warning] message.
E) As root, execute the show password command by using the SHA-256 password encryption plug-in.

4. You just installed MySQL by Using a Package Manager on Linux.
Where are the default InnoDB redo log files stored?

A) /usr/bin/logs
B) /usr/mysql
C) /etc/my.cnf
D) /usr/redo
E) /var/lib/mysql
F) /var/lib/mysql/innodb

5. By using the asynchronous MySQL Replication architecture, data can be replicated to slaves. Identify three use cases of MySQL Replication.

A) MySQL Enterprise Backup will back up from Slave automatically.
B) It provides multi-master access where the application can write and read data across the database servers.
C) It allows backup to be done on the slave without impacting the master.
D) MySQL Replication Connector/J (ReplicationDriver) is provided to allow read capability on slave and write capability on master.
E) You can create a slave server for reporting applications, which get only read access to the slave servers. It off-loads the master server. Additional servers allow different database server configuration.

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