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Oracle 1Z0-921 Exam Syllabus Topics:

Oracle MySQL 2021 Implementation Essentials Sample Questions:

Question 1

The slave connects to the master and asks for updated records. What command was issued for this to happen?

A. SLAVE RUN
B. SLAVE START
C. RUN SLAVE
D. START RUN SLAVE
E. START SLAVE

Question 2

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 MASTER and SLAVE are grouped as one instance for monitoring.
C. The mysql.inventory table on SLAVE is cloned with the same content as MASTER, which has the same server UUID.
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.

Question 3

Which best describes database horizontal scale-out architecture deployment in MySQL in a read-heavy environment?

A. Increasing the memory capacity so that there is a larger pooling buffer to increase the database read performance.
B. Adding more MySQL servers and sharing the same dacadir on a shared storage component like NFS.
C. Allocating more CPU to the database instance to improve throughput performance.
D. Deploy MySQL read-only slaves utilizing replication so that the slaves can be used for reads.
E. Increasing the storage capacity so that the database can store more data to scale.

Question 4

You want to change the default behavior of MySQL Enterprise Monitor (MEM). New instances detected by a MEM agent should automatically monitor discovered instances.
How can you change the Advisor Setting?

A. Go to the configuration section (Advisors) and create a new advisor rule for new MySQL instances based on the MySQL Advisor Wizard.
B. Go to the configuration section (Users) and create a new user according to the existing users of your new MySQL instances.
C. Go to the configuration section (Advisors) and edit the default settings of the MySQL Process Discovery according to the existing users of your new MySQL instances.
D. Go to the configuration section (MEM) and configure the default login credentials.

Question 5

After installing MySQL 8.0, you initialize the data directory with the --initialize command. Which two are places where you can find the root password?

A. As root, execute the show password command by using the SHA-256 password encryption plug-in.
B. The root password inserted in the error log set by the --log-error=[file_name] variable
C. The root password is not given and is blank. You must manually set the root password.
D. The root password displayed on the screen via a [warning] message.
E. The root_pw variable stored in the mysq1.install table.

Solutions: