Oracle MySQL 2021 Implementation Essentials : 1Z1-921 exam

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Oracle 1Z1-921 Exam Syllabus Topics:

Oracle MySQL 2021 Implementation Essentials Sample Questions:

1. Which three prerequisites are needed for creating an Oracle Linux VM instance in the Oracle Cloud Infrastructure?

A) ssh key pair
B) bare metal Oracle Linux shape
C) Object Storage
D) subnet configured on a Virtual Cloud Network (VCN)
E) Custom Image
F) existing VCN

2. Consider this SQL statement which is using the innoDB storage engine and with global AUTOCOMMIT = 1:

What is the result after issuing the rollback command?

A) Only the t2 table is created.
B) Both the tables, t1 and t2, are not created because there is an explicit ROLLBACK.
C) Only the t1 table is created.
D) Both the tables, t1 and t2, are created.

3. 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) 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.
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) MySQL Enterprise Backup does not back up system data so that it is much faster.

4. You have a MySQL Server instance (running with Port# 3306) monitored by the Service Manager in MySQL Enterprise Monitor. You cloned the MySQL Database instance and configured it to be a replicated MySQL instance as Slave using Port# 3316 on the same machine as the Master Server. The replication configuration is working correctly. The Master and Slave Servers are running.
You are trying to add the newly created MySQL Slave instance to the Monitor. The Service Manager in MySQL Enterprise Monitor notifies you that the new instance is successfully added; however, it is not added correctly at the newly added configuration points to the old Master monitored items. The Monitor shows only one monitored MySQL instance for Master and Slave.
Which two are possible reasons for this problem?

A) All the MySQL instances (Master and Slave) have the same server_uuid in <datadir>/auto.cnf.
B) The mysql.inventory table on SLAVE is cloned with the same content as MASTER, which has the same server UUID.
C) The MASTER and SLAVE are grouped as one instance for monitoring.
D) The mysql.instance table on SLAVE is cloned with the same content as MASTER, which has the same server UUID.
E) The SLAVE and MASTER instances are started with the same configured value for the option - - monitor_server_uuid.

5. Your newly-created Oracle Cloud Infrastructure instance is not available for login in. Which is a valid reason for this issue?

A) You forgot to create the correct SSL/TLC certificate during the setup process.
B) Only root is allowed to access from non-localhost.
C) The opc user can be used to access MySQL only with the created SSH-Key.
D) You forgot to enable port 3306.
E) The OCI instance is still in the "creation" process.

Solutions: