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Oracle MySQL 2021 Implementation Essentials Sample Questions:

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

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

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

3. Which two statements are true about the creation or use of a Virtual Cloud Network (VCN)?

A) You must have an IPSec VPN to connect to an Oracle Linux instance.
B) You can connect directly to the VCN without a define subnet.
C) Your instance does not have a public IP address, so you cannot connect with a public subnet.
D) You must have an Internet gateway to connect to a public address on an Oracle Linux instance.
E) You can connect directly to an instance over the internet, without a public IP address.

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

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

5. Which two methods help prevent MySQL security risks?

A) Grant only permissions that a user requires.
B) Use a firewall to control access to MySQL ports.
C) Allow unauthorized clients to connect to the server.
D) Use the secure installation script "mysql_alays_secure_installation".
E) Ensure that MySQL accounts have short and easy passwords.
F) Transmit plain (unencrypted) data over networks.

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