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Oracle MySQL 2021 Implementation Essentials Sample Questions:

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

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

2. An existing MySQL Database environment has been doing backup and restore in a logical way by using the mysq1dump and mysq1 client utilities. When the backup is started using mysqldump with single-transaction mode, the existing application has long wait time. When the restore is required, it takes more than three hours to restore.
What two are benefits of using mysqlbackup from MySQL Enterprise Backup in this situation?

A) mysqlbackup utilities dump the full database into a SQL file, which is imported into the mysql client in single-thread mode. mysqlbackup restores data from physical backups. Physical backup methods are faster than logical methods because they involve only file coping without conversion.
B) mysqlbackup from MySQL Enterprise Backup allows logical backup with concurrency built in to get faster backup speed and restoration speed.
C) MySQL Enterprise Backup provides tape backup integration by default. It has the virtual tape option, which allows backup to tape device directly without extra third-party software integration.
D) MySQL Enterprise Backup does not back up system data so that it is much faster.
E) mysqlbackup can back up tables with the InnoDB engine without blocking. The backup is hot with InnoDB. Together with Incremental Backup, mysqlbackup from MySQL Enterprise Backup shortens the backup windows.

3. You set up a compressed full backup file from mysqlbackup by using the --compress option for MySQL Database backup. You are required to restore the database and apply the log.
Which two options should you add to the mysqlbackup to achieve the restoration of the database?

A) --uncompress
B) --decompress
C) --apply-log-and-copy-back
D) --uncompress-and-apply-log
E) --copy-back-and-apply-log

4. Which activity will take place if a table is created with both the compression and encryption options?

A) The compression is performed before tablespace data is encrypted.
B) The tablespace data is encrypted first and then compression is performed.
C) The system generates an error because the COMPRESSION and ENCRYPTION options cannot be used together.
D) The compression is performed, the ''data_at_rest_flag" is turned on and the tablespace data is encrypted.

5. Which three are characteristics of the JSON data type?

A) It supports indexing directly against the JSON-defined column.
B) Comparisons of JSON values are not case-sensitive.
C) It validates the JSON syntax on insert or merge.
D) Key or array references enable quick read-access to look up document elements directly.
E) A set of SQL functions substantially support the SQL utilization of the data type.
F) It is based on the TEXT data type.

Solutions: