Oracle MySQL 2021 Implementation Essentials : 1Z0-921 Exam Questions

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Oracle 1Z0-921 Exam Syllabus Topics:

Oracle MySQL 2021 Implementation Essentials Sample Questions:

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

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 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.
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 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.
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 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.
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 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.

3. Which is true about inserting an additional line in a single document stored in MySQL document store?

A) The path specified must be an array position past the end of an array using the JSON_POSITION statement.
B) You cannot insert a single line, you have to replace the entire document with a new document.
C) Any new lines can only be inserted at the end of the document.
D) You specify the new element,s position in the JSON_ARRAY_INSERT statement.

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

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

5. What is true about MySQL Enterprise Transparent Data Encryption (TDE)?

A) Data is encrypted automatically, in real time, after it is written to storage.
B) Enables data-at-rest encryption by encrypting the physical files of the database.
C) Encryption key is stored in a centralized key memory location
D) Tablespace keys are managed manually behind the scenes.

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