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Oracle 1Z0-921 Exam Syllabus Topics:

Oracle MySQL 2021 Implementation Essentials Sample Questions:

1. Which two methods help prevent MySQL security risks?

A) Ensure that MySQL accounts have short and easy passwords.
B) Use a firewall to control access to MySQL ports.
C) Grant only permissions that a user requires.
D) Use the secure installation script "mysql_alays_secure_installation".
E) Transmit plain (unencrypted) data over networks.
F) Allow unauthorized clients to connect to the server.

2. You have three machines with MySQL Databases running on Linux platform.
Which backup procedures would allow online and remote backup of the MySQL Database on the three machines to a connected Storage NFS?

A) 1. Mount the Remote Storage NFS volume to each of the three machines with proper privilege for the backup OS user to have all access.2. Install MySQL Enterprise Backup on the machine that is used to start the backup.3. Start mysqlbackup on only one machine with the installation to back up the databases for the three machines to the mounted volume using - - backup-dir and by specifying -- config-files=my1.cnf, my2.cnf, my3.cnf.my1.cnf, my2cnf, and my3.cnf are the MySQL Database Configuration files on the three machines.4. Validate the backup by using the mysqlbackup program to ensure that the backup created is valid.
B) 1. Mount the Remote Storage NFS volume to each of the three machines with proper privilege for the backup OS user to have all access.2. Install MySQL Workbench on a separate machine, which is used to connect to the three machines to back up and restore.3. Startup MySQL backup from MySQL Workbench to back up the three databases.4. Validate the backup by using MySQL Workbench to ensure that the backup created is valid.
C) 1. Mount the Remote Storage NFS volume to each of the three machines with proper privilege for the backup OS user to have all access.2. Install MySQL Enterprise Backup on all three machines.3. Start mysqlbackup on all machines to back up the database to the mounted volume using - -backup-dir.4. Validate the backup using the mysqlbackup program to ensure that the backup created is valid.
D) 1. Mount the Remote Storage NFS volume to each of the three machines with proper privilege for the backup OS user to have all access.2. Install MySQL Enterprise Backup on machine which is used to start the backup.3. Start mysqlbackup on only one machine with the installation to back up the databases for the three machines to the mounted volume using - -backup-dir and by giving--hosts=machine1:port1, machine2:port2, machine3:port3.4. Validate the backups using the mysqlbackup program to ensure that the backups created are valid.

3. Which three are recommended configurations for installing and running MySQL InnoDB Cluster?

A) The number of machines per group must be 3, 5, 7 or 9.
B) Use Network-attached storage (NAS) for the data files.
C) Networks must be in separate regions.
D) Groups must be in even numbers; 2, 4, 6, 8.
E) use SSD,s for data and replication logs
F) smaller VM,s work best - with a maximum of eight vCPU,s and 16GB of RAM
G) isolated machine resources

4. What three are ways to export and import data in MySQL Workbench?

A) Data Modeling Import Export Wizard
B) SQL Data Export and Import Wizard
C) Binary Data Export and Import Wizard
D) Table Data Export and Import Wizard
E) Backup Data Export and Import Wizard
F) Result Data Export and Import

5. MySQL is installed on a Linux server with the configuration:
Which two methods can change the default options to use the authentication plug-in that implements SHA-256 hashing for user account passwords?

A) Add --default_authentication_plugin=sha256_password on the command line when you invoke the server.
B) Create user by using CREATE USER 'newuser'@'localhost' IDENTIFIED WITH 'Sh@256Pa33';
C) Add default_authentication_plugin=sha256_password under [mysqld] in the configuration file.
D) Create user by using CREATE USER 'newuser' @'localhost' SET PASSWORD AS 'Sh@256Pa33';

Solutions: