1Z1-921考古題分享 & 1Z1-921試題

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Oracle 1Z0-921（MySQL 2021 實施基礎）考試是為想要展示他們 MySQL 數據庫實施專業知識的專業人士設計的認證計劃。考試旨在測試候選人在 MySQL 數據庫實施的各個方面，如安裝和配置、安全管理、備份和恢復、性能優化和故障排除方面的知識和技能。該考試針對具有 MySQL 基礎的個人，希望向潛在雇主展示他們的技術技能和知識。

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>> 1Z1-921考古題分享 <<

1Z1-921試題，1Z1-921考證

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最新的 Oracle MySQL 1Z1-921 免費考試真題 (Q17-Q22):

問題 #17
Which query will find rows in a table that have no counterpart in another table?

A. SELECT *FROM table1 INNER JOIN table2 ON table1.id=table2.id WHERE table1.id=! table2.id;
B. SELECT left_tbl.*FROM left_tbl LEFT JOIN right_tbl ON left_tbl.id=right_tbl.idWHERE right_tbl.id IS NULL;
C. SELECT t1.name, t2.name2FROM employee AS t1 INNER JOIN info AS t2 ON t1.name= t2.name2;
D. SELECT t1.name, t2.name2FROM employee t1 INNER JOIN info t2 WHERE t1.name=t2.name;

答案：B

問題 #18
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. The SLAVE and MASTER instances are started with the same configured value for the option - - monitor_server_uuid.
B. The MASTER and SLAVE are grouped as one instance for monitoring.
C. The mysql.instance table on SLAVE is cloned with the same content as MASTER, which has the same server UUID.
D. All the MySQL instances (Master and Slave) have the same server_uuid in <datadir>/auto.cnf.
E. The mysql.inventory table on SLAVE is cloned with the same content as MASTER, which has the same server UUID.

答案：B,C

問題 #19
What is Kubernetes in the context of MySQL?
Response:

A. A database management tool for MySQL.
B. An open-source container orchestration platform.
C. A cloud service provided by Oracle for MySQL databases.
D. A database engine for MySQL.

答案：B

問題 #20
You execute this statement:
SELECT NULL=NULL;
What is the result?

A. 0
B. TRUE
C. FALSE
D. 1
E. NULL

答案：E

問題 #21
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 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.
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 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.

答案：D

問題 #22
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