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Oracle MySQL 2021 Implementation Essentials Sample Questions:

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

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

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

3. Which MySQL command is used to grant specific privileges to a user on a database?
Response:

A) GIVE ACCESS
B) GRANT PERMISSIONS
C) GRANT
D) SET PRIVILEGES

4. Which is true about inserting an additional line in a single document stored in MySQL document store?

A) Any new lines can only be inserted at the end of the document.
B) You cannot insert a single line, you have to replace the entire document with a new document.
C) You specify the new element,s position in the JSON_ARRAY_INSERT statement.
D) The path specified must be an array position past the end of an array using the JSON_POSITION statement.

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

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

Solutions: