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Oracle MySQL 2021 Implementation Essentials Sample Questions:

1. Which three are recommended configurations for installing and running MySQL InnoDB Cluster?

A) Networks must be in separate regions.
B) smaller VM,s work best - with a maximum of eight vCPU,s and 16GB of RAM
C) Use Network-attached storage (NAS) for the data files.
D) The number of machines per group must be 3, 5, 7 or 9.
E) Groups must be in even numbers; 2, 4, 6, 8.
F) use SSD,s for data and replication logs
G) isolated machine resources

2. 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) Adding a memcached-tier for caching data and objects in RAM to reduce the number of times an external data source must be read.
C) Edit the configuration file and increase the value for parallel_read_workers and reboot the server
D) Implementing a three-node, single-primary InnoDB Cluster.
E) Altering the storage engine for all tables to memory to increase performance.

3. Which three options are valid reasons for using a primary key in a table?

A) automatic storage of data in a sorted order
B) exporting data faster with mysqldump
C) maintaining a history of row insertions or updates
D) preventing duplicate keys
E) increasing performance when using select statements
F) to make it easier to change the PRIMARY KEY value

4. How does MySQL HeatWave improve query performance?
Response:

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

5. By using the asynchronous MySQL Replication architecture, data can be replicated to slaves. Identify three use cases of MySQL Replication.

A) It provides multi-master access where the application can write and read data across the database servers.
B) You can create a slave server for reporting applications, which get only read access to the slave servers. It off-loads the master server. Additional servers allow different database server configuration.
C) MySQL Replication Connector/J (ReplicationDriver) is provided to allow read capability on slave and write capability on master.
D) It allows backup to be done on the slave without impacting the master.
E) MySQL Enterprise Backup will back up from Slave automatically.

Solutions: