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Oracle 1Z0-921 Exam Syllabus Topics:

Oracle MySQL 2021 Implementation Essentials Sample Questions:

Question 1

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

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

Question 2

How does MySQL HeatWave improve query performance?
Response:

A. By offloading analytics queries to an in-memory, highly parallel processing engine.
B. By replicating data across multiple servers.
C. By caching the entire database in memory.
D. By automatically creating indexes on frequently used columns.

Question 3

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

Question 4

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

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

Question 5

The user -os-user'@"localhost" was created to monitor connections and shut down the server, and was granted these privileges:
GRANT PROCESS, SHUTDOWN ON *.* TO "OS-user*@"localhost';
Which three are commands that the os-user can execute?

A. SHOW BINLOG EVENTS;
B. SHOW PROCESSLIST;
C. GRANT PROXY
D. SHUTDOWN
E. KILL PROCESS;
F. SHOW STATUS;

Solutions: