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Oracle 1Z1-921 Exam Syllabus Topics:

Oracle MySQL 2021 Implementation Essentials Sample Questions:

1. By using the asynchronous MySQL Replication architecture, data can be replicated to slaves. Identify three use cases of MySQL Replication.

A) You can create a slave server for reporting applications, which get only read access to the slave servers. It off-loads the master server. Additional servers allow different database server configuration.
B) It allows backup to be done on the slave without impacting the master.
C) MySQL Enterprise Backup will back up from Slave automatically.
D) It provides multi-master access where the application can write and read data across the database servers.
E) MySQL Replication Connector/J (ReplicationDriver) is provided to allow read capability on slave and write capability on master.

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

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

3. Which statement would you use to remove the population column from the city table?

A) DROP population FROM city;
B) ALTER TABLE city DROP population;
C) ALTER TABLE city DELETE population;
D) ALTER TABLE city LESS population;
E) DELETE population FROM city;

4. Which statement will display the status of the partitioning plug-in?

A) SHOW PLUGINS WHERE Name= 'partition';
B) SELECT PLUGIN_NAME, PLUGIN_VERSION, PLUGIN_STATUS FROM INFOMRATION_SCHEMA.PLUGINS WHERE PLUGIN_NAME= 'partition';
C) SHOW STATUS PLUGINS WHERE Name= 'PARTITIONING';
D) USE SYS SCHEMA; SHOW PLUGINS STATUS;

5. You have been using mysqldump for logical backups of your MySQL databases. Your MySQL database size has been growing. Which two options can reduce the backup size and speed up the backup time?

A) Use mysqldump with - -incremental together with the - -compress option to back up incrementally based on previous full backup and compress the incremental backup files.
B) Use MySQL Enterprise Backup with the - -compress option to compress the backup files and use - - compress-level to select the level of compression.
C) Use MySQL Enterprise Backup with the - -size=compress to compress the backup file.
D) Use mysqldump with the - -changesonly option.
E) Use MySQL Enterprise Backup with the - - incremental policy to back up incrementally based on previous full backup.

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