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Oracle 1Z0-921 (MySQL 2021 Implementation Essentials) certification exam is designed for professionals who want to demonstrate their expertise in MySQL 8.0 implementation. 1Z0-921 exam is intended for individuals who work with MySQL databases and have a strong understanding of the MySQL architecture, configuration, security, and performance tuning. 1Z0-921 exam covers a wide range of topics that test the candidate's knowledge and understanding of MySQL database administration.

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Oracle MySQL 2021 Implementation Essentials Sample Questions (Q39-Q44):

NEW QUESTION # 39
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. The mysql.inventory table on SLAVE is cloned with the same content as MASTER, which has the same server UUID.
E. All the MySQL instances (Master and Slave) have the same server_uuid in <datadir>/auto.cnf.

Answer: B,C

NEW QUESTION # 40
You want to create the user named jenny for any host server with the password secretpassi23! and the password is expired? Which command should you use?

A. CREATE USER ,jenny,@,%, IDENTIFIED WITH sha256_password BY 'SecretPass123!,;
B. CREATE USER ,jenny,@'%, WITH HASHED(password,,SecretPass123!,), PASSWORD EXPIRE
C. CREATE USER ,jenny,0,%t IDENTIFIED BY ,SecretPass123!, PASSWORD EXPIRE;
D. CREATE USER ,jenny,@,localhost, IDENTIFIED BY (,SecretPass123!,,,256,, Expired)
E. CREATE USER ,jenny *@,localhost, IDENTIFIED WITH HASH PASSWORD(,SecretPass123!,)

Answer: D

NEW QUESTION # 41
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 reached the database instance limit of 32.
B. 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.
C. The customer does not have proper user rights.
D. The customer account might have reached resource quota/limits.

Answer: A

NEW QUESTION # 42
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. On the Master server, disable binlog by removing the --log-bin option.
B. To safely purge binary log files, perform these steps:
C. Set the expire_logs_days system variable to expire binary log files automatically after a given number of days.
D. Execute the purge binary logs statement without argument.
E. Delete all binlog files manually on the file system to release storage spaces.

Answer: B,C

NEW QUESTION # 43
Which is true about inserting an additional line in a single document stored in MySQL document store?

A. The path specified must be an array position past the end of an array using the JSON_POSITION statement.
B. You cannot insert a single line, you have to replace the entire document with a new document.
C. You specify the new element,s position in the JSON_ARRAY_INSERT statement.
D. Any new lines can only be inserted at the end of the document.

Answer: C

NEW QUESTION # 44
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Oracle MySQL 2021 Implementation Essentials Sample Questions (Q39-Q44):

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