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Oracle MySQL 2021 Implementation Essentials Sample Questions:

1. Which statement is used to create a new MySQL database?
Response:

A) CREATE SCHEMA
B) CREATE TABLE
C) NEW DATABASE
D) CREATE DATABASE

2. You just installed MySQL by Using a Package Manager on Linux.
Where are the default InnoDB redo log files stored?

A) /var/lib/mysql
B) /usr/redo
C) /var/lib/mysql/innodb
D) /usr/bin/logs
E) /usr/mysql
F) /etc/my.cnf

3. Which three are requirements for MySQL Group Replication (GR)?

A) The use of global transaction identifiers is required.
B) Data to be replicated must be stored in the InnoDB transactional storage engine.
C) Primary keys are required on every replicated table.
D) GR only works with MySQL versions 8.0.12 or higher.
E) The binary log format must be set to mixed.
F) The minimum number of required nodes for achieving a consensus is two.

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

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

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

Solutions: