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Oracle 1Z1-921 Exam Syllabus Topics:

Oracle MySQL 2021 Implementation Essentials Sample Questions:

Question 1

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

Question 2

Which three statements are true about MySQL Enterprise Backup?

A. It enables you to take non-locking backups.
B. It performs hot or warm backups.
C. It cannot back up encrypted tablespaces.
D. It performs logical backups.
E. It provides the ability to create incremental backups.

Question 3

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 4

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

A. Adding more MySQL servers and sharing the same dacadir on a shared storage component like NFS.
B. Increasing the storage capacity so that the database can store more data to scale.
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 memory capacity so that there is a larger pooling buffer to increase the database read performance.

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

Solutions: