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Oracle 1Z1-921 Exam Syllabus Topics:

Oracle MySQL 2021 Implementation Essentials Sample Questions:

Question 1

How does MySQL HeatWave improve query performance?
Response:

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

Question 2

You execute this statement:
SELECT NULL=NULL;
What is the result?

A. NULL
B. 1
C. FALSE
D. TRUE
E. 0

Question 3

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

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

Question 4

Your newly-created Oracle Cloud Infrastructure instance is not available for login in. Which is a valid reason for this issue?

A. You forgot to enable port 3306.
B. The opc user can be used to access MySQL only with the created SSH-Key.
C. Only root is allowed to access from non-localhost.
D. The OCI instance is still in the "creation" process.
E. You forgot to create the correct SSL/TLC certificate during the setup process.

Question 5

The MySQL Enterprise Monitor Agent requires a user configured in each MySQL instance that is being monitored with suitable privileges to collect information about the server.
Which statement is correct?

A. Monitoring metrics need super and root privileges because they are not available for a less-privileged user.
B. The super privilege is required when creating and populating the inventory table, as well as running statements such as show master logs or SHOW ENGINE INNODB STATUS.
C. MySQL Enterprise Monitor creates the required users automatically.
D. The super privilege is required when starting, stopping, or restarting monitored MySQL databases.

Solutions: