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Oracle MySQL 2021 Implementation Essentials Sample Questions:

1. You are using the innoDB engine and the innodb_f ile_per_table option is set.
You delete a significant number of rows of a large table named inventory and issue the command optimize table inventory.
What will happen to the inventory table?

A) The table will be optimized and replicated.
B) The table storage space will be reduced.
C) The table statistics will be stored.
D) The table will be checked for errors and repaired.

2. You have been using mysqldump for logical backups of your MySQL databases. Your MySQL database size has been growing. Which two options can reduce the backup size and speed up the backup time?

A) Use MySQL Enterprise Backup with the - -compress option to compress the backup files and use - - compress-level to select the level of compression.
B) Use MySQL Enterprise Backup with the - - incremental policy to back up incrementally based on previous full backup.
C) Use mysqldump with the - -changesonly option.
D) Use MySQL Enterprise Backup with the - -size=compress to compress the backup file.
E) Use mysqldump with - -incremental together with the - -compress option to back up incrementally based on previous full backup and compress the incremental backup files.

3. Which three components can MySQL InnoDB Cluster use to Achieve database high availability?

A) MySQL X Plugin to enable MySQL to use the X Protocol to speed up and monitor data replication.
B) MySQL Router to ensure client requests are load balanced and routed to the correct servers.
C) MySQL Servers with Group Replication to replicate data to all members of the cluster.
D) MySQL Online Hot Backup to keep data consistent and always ready to be used.
E) MySQL Shell to create and administer InnoDB Clusters using the built-in AdminAPI.

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

5. How would you restrict a user Joe from accessing all MySQL database objects?

A) UPDATE mysql.user SET Password=PASSWORD(,Invalid,) WHERE User=,joe';
B) CREATE USER , joe,@1' %' DENY ALL PRIVILEGES
C) REVOKE ALL PRIVILEGES, GRANT OPTION FROM ,joe,@,%,;
D) Insert Joe,s name into the mysql.user_restriction cable, and issue the FLUSH PRIVILEGES command.
E) CREATE USER ,joe'@,0.0.0.0, SET Password=PASSWORD(,% ! %,)

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