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Oracle 1Z0-921 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) subnet configured on a Virtual Cloud Network (VCN)
B) bare metal Oracle Linux shape
C) Custom Image
D) Object Storage
E) existing VCN
F) ssh key pair

2. Which three are requirements for MySQL Group Replication (GR)?

A) The binary log format must be set to mixed.
B) Data to be replicated must be stored in the InnoDB transactional storage engine.
C) The use of global transaction identifiers is required.
D) GR only works with MySQL versions 8.0.12 or higher.
E) Primary keys are required on every replicated table.
F) The minimum number of required nodes for achieving a consensus is two.

3. An Oracle Cloud Infrastructure customer already has many database instances configured and running in the cloud; however, they are reporting that they are unable to create any more instances.
What could be the problem?

A) The customer has not kept up with their patching requirements; new instances cannot be created unless the majority or the template of existing instances are up-to-date.
B) The customer reached the database instance limit of 32.
C) The customer account might have reached resource quota/limits.
D) The customer does not have proper user rights.

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

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

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

Solutions: