Oracle 1Z1-921 : MySQL 2021 Implementation Essentials

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Oracle 1Z1-921 Exam Syllabus Topics:

Oracle MySQL 2021 Implementation Essentials Sample Questions:

1. What are Security Lists in Oracle Cloud Infrastructure?

A) Security lists are data encryption levels that control who can see the data.
B) They allow administrators access to applications in the cloud and external servers.
C) They are essentially firewall rules that help control traffic between OCI instances.
D) They contain rules established by HIPAA for securing end-user data.
E) They are user-role designations that assign rights to certain internal users and external users.

2. Which of the following statements is true regarding MySQL user account privileges?
Response:

A) The RELOAD privilege allows a user to delete data from a table.
B) The USAGE privilege allows a user to connect to the MySQL server but grants no other privileges.
C) A user with the SUPER privilege can only read data from the database.
D) The GRANT option allows a user to revoke privileges from other users.

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

A) On Windows systems, MySQL Enterprise Firewall is controlled and managed by using the Windows Internet Connection Firewall control panel.
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) MySQL Enterprise Firewall shows only notifications blocked connections, which originated outside of your network's primary domain.
D) 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.
E) System tables named firewall_users and firewall_whitelist in the mysql database provide persistent storage of firewall data.
F) MySQL Enterprise Firewall is available only in MySQL Enterprise versions 5.7.10.and later.

4. An existing MySQL Database environment has been doing backup and restore in a logical way by using the mysq1dump and mysq1 client utilities. When the backup is started using mysqldump with single-transaction mode, the existing application has long wait time. When the restore is required, it takes more than three hours to restore.
What two are benefits of using mysqlbackup from MySQL Enterprise Backup in this situation?

A) mysqlbackup utilities dump the full database into a SQL file, which is imported into the mysql client in single-thread mode. mysqlbackup restores data from physical backups. Physical backup methods are faster than logical methods because they involve only file coping without conversion.
B) MySQL Enterprise Backup does not back up system data so that it is much faster.
C) mysqlbackup from MySQL Enterprise Backup allows logical backup with concurrency built in to get faster backup speed and restoration speed.
D) MySQL Enterprise Backup provides tape backup integration by default. It has the virtual tape option, which allows backup to tape device directly without extra third-party software integration.
E) mysqlbackup can back up tables with the InnoDB engine without blocking. The backup is hot with InnoDB. Together with Incremental Backup, mysqlbackup from MySQL Enterprise Backup shortens the backup windows.

5. The replication for a Master and Slave MySQL Servers is up and running. The disk space for Master Server is continuously growing. The binlog size keeps growing. Which two methods can fix the issue?

A) Delete all binlog files manually on the file system to release storage spaces.
B) Execute the purge binary logs statement without argument.
C) On the Master server, disable binlog by removing the --log-bin option.
D) To safely purge binary log files, perform these steps:
E) Set the expire_logs_days system variable to expire binary log files automatically after a given number of days.

Solutions: