多项选择题
In a design situation, there are multiple character sets that can properly encode your data. Which three should influence your choice of character set?（）
A.Syntax when writing queries involving JOINS
B.Memory usage when working with the data
C.Character set mapping index hash size
D.Disk usage when storing data
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单项选择题
You install a copy of Mysql 5.6.13 on a brand new Linux server by using RPM packages. The server starts successfully as verified by the following commands: $ pidof mysqld 3132 $tail – n2 /var/lib.mysql/hostname.err 2013-08-18 08:18:38 3132 [Note] /usr/sbin/mysqld:ready for connections. Version: 5.6.13-enterprise-commercial-advaced socket:/tmp/mysql.sock port; 3306 Mysql Enterprise Server – Advanced Edition (Commercial) You attempt to log in as the root user with the following command: $mysql – u root ERROR 1045 (28000): Access denied for user root@localhost (using password: NO) Which statement is true about this scenario?（）
A.The RPM installation script sets a default password of password for new installations
B.The local root user must log in with a blank password initially: mysql –u root –p
C.New security measures mean that the mysql_secure_installation script must be run first on all new installations
D.The mysql_install_bd post-installation script used – random-password -
多项选择题
What are four capabilities of the mysql client program?（）
A.Creating, dropping, and modifying tables and indexes
B.Initiating a binary backup of the database by using the START BACKUP command
C.Displaying replication status information
D.Shutting down the server by using the SHUTDOWN command
E.Creating and dropping databases
F.Creating and administering users -
多项选择题
Consider the events_% tables in performance Schema. Which two methods will clear or reset the collected events in the tables?（）
A.Using DELETE statements, for example, DELETE FROM performance_schema.events_watis_current
B.Using the statement RESET PERFORMANCE CACHE
C.Using the statement FLUSH PERFORMANCE CACHE
D.Using TRUNCATE statements, for example, TRUNATE TABLE performance_schema.events_waits_current
E.Disabling and re-enabling all instruments
F.Restarting Mysql
