Oracle MySQL 2021 Implementation Essentials : 1Z1-921

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Oracle 1Z1-921 Exam Syllabus Topics:

Oracle MySQL 2021 Implementation Essentials Sample Questions:

1. Which two deployment architectures could you use for scaling-out database reads?

A) Adding a memcached-tier for caching data and objects in RAM to reduce the number of times an external data source must be read.
B) Implementing a three-node, single-primary InnoDB Cluster.
C) Altering the storage engine for all tables to memory to increase performance.
D) Edit the configuration file and increase the value for parallel_read_workers and reboot the server
E) Changing the system setting with memory stickiness to true in order not to swap out mysq1dfrom memory.

2. What SQL keyword must be specified when creating a foreign key constraint?

A) the SET_FOREGIN variable in the my .cnf file
B) an index on the foreign key
C) a TRIGGER on the child table for cascading delete statements
D) a REFERENCES in the child table to the parent table
E) unique PRIMARY key values for both child and parent tables

3. Which two methods help prevent MySQL security risks?

A) Use a firewall to control access to MySQL ports.
B) Use the secure installation script "mysql_alays_secure_installation".
C) Grant only permissions that a user requires.
D) Ensure that MySQL accounts have short and easy passwords.
E) Allow unauthorized clients to connect to the server.
F) Transmit plain (unencrypted) data over networks.

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

5. You establish MySQL Enterprise Server on Oracle Cloud Infrastructure connection via Secure Shell (SSH).
When accessing a new MySQL Enterprise Edition Oracle Cloud Infrastructure (OCI) instance, you want to use MySQL Enterprise Workbench for SQL and remote management.
What are two ways to successfully configure Workbench based on the MySQL access credentials?

A) Configure the MySQL Router first and based on those settings, you access your MySQL CS instance.
B) Configure TCP/IP over SSH and based on the created private key, opc-User, and MySQL access credentials, you can access the MySQL OCI instance.
C) Open the MySQL OCI instance access port 3306. For the MySQL connection, you use this port, and, in addition, you configure the remote management based on SSH based on the provided key.
D) Convert the private key to ppk format first. Based on TCP/IP over SSH and based on the created private key, opc-user, and MySQL access credentials, you can access the MySQL CS instance.

Solutions: