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Oracle MySQL 2021 Implementation Essentials 認定 1Z0-921 試験問題:

1. Which features of MySQL Enterprise Edition should you use to proactively monitor and track data changes in your databases?

A) SQL Enterprise Monitor and MySQL Enterprise Authentication
B) MySQL Workbench and MySQL Enterprise Firewall
C) MySQL Enterprise Monitor and MySQL Audit
D) MySQL Audit and MySQL Workbench

2. What SQL keyword must be specified when creating a foreign key constraint?

A) unique PRIMARY key values for both child and parent tables
B) a REFERENCES in the child table to the parent table
C) the SET_FOREGIN variable in the my .cnf file
D) a TRIGGER on the child table for cascading delete statements
E) an index on the foreign key

3. You get a maintenance-notification about your MySQL Enterprise Edition in Oracle Cloud Infrastructure (OCI) Compute instance. What is re the implication?

A) There are no maintenance operations planned. You need to do them manually.
B) Depending on the planned outage, you may not be affected by it. You need to read the maintenance details in the support notice.
C) You can expect an outage of your MySQL OCI instance during the planned time..
D) You need to agree to the maintenance windows. If not, you are not affected by the outage.

4. You establish MySQL Enterprise Server on Oracle Cloud Infrastructure connection via Secure Shell (SSH).
When accessing a new MySQL Enterprise Edition Oracle Cloud Infrastructure (OCI) instance, you want to use MySQL Enterprise Workbench for SQL and remote management.
What are two ways to successfully configure Workbench based on the MySQL access credentials?

A) Configure the MySQL Router first and based on those settings, you access your MySQL CS instance.
B) Convert the private key to ppk format first. Based on TCP/IP over SSH and based on the created private key, opc-user, and MySQL access credentials, you can access the MySQL CS instance.
C) Configure TCP/IP over SSH and based on the created private key, opc-User, and MySQL access credentials, you can access the MySQL OCI instance.
D) Open the MySQL OCI instance access port 3306. For the MySQL connection, you use this port, and, in addition, you configure the remote management based on SSH based on the provided key.

5. 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 from MySQL Enterprise Backup allows logical backup with concurrency built in to get faster backup speed and restoration speed.
B) 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.
C) MySQL Enterprise Backup does not back up system data so that it is much faster.
D) 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.
E) 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.

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