Oracle MySQL 5.7 Database Administrator - 1Z0-888 Exam Practice Test

You are investigating the performance of a query which selects data from an InnoDB table.
Consider this Performance Schema diagnostics output for the query:

Which statement is true about the output?

An admin attempts to enforce stronger security by using these commands:

The admin then leaves the system running with the specified changes. What are two remaining security concerns?

You are contacted by a user who does not have permission to access a database table. You determine after investigation that this user should be permitted to have access and so you execute a GRANT statement to enable the user to access the table.
Which statement describes the activation of that access for the user?

Consider the two partial outputs of the SHOW GLOBAL VARIABLES command from a master and slave server:
Master:

Slave:

There is a problem with the slave replicating from the master. Which statement describes the cause of the problem?

A MySQL replication slave is set up as follows:
Uses all InnoDB tables
Receives ROW-based binary logs
Has the read-only option
The replication slave has been found in an error state. You check the MySQL error log file and find these entries:

What are two possible causes for this error to occur?

You have just created a replication slave from a backup of the master made with mysqldump:

You try to log in to the slave with the application user, but fail as follows:

The login works on the master.
Which two changes to the process can fix the issue?

A MySQL server was initialized with separate UNDO tablespaces. Users complain that when they roll back large transactions, the time to process the request takes too long. The DBA would like to move the MySQL InnoDB UNDO tablespace to a solid-state drive (SSD) for better performance. Is this possible and how?

You want to create a temporary table named OLD_INVENTORY in the OLD_INVENTORY database on the master server. This table is not to be replicated to the slave server. Which two changes would ensure that the temporary table does not propagate to the slave?

You have a scheduled task on Linux that executes mysqldumpagainst the localhost server periodically.
When checking the logs of this event to ensure that things are working and that backups will restore, you notice an output that is concerning.
The command the scheduled task is executing as follows:
$ mysqldump -u backupuser -h 127.0.0.1 -pt100043va living --protocol=TCP
> /backups/latest.sql
Warning: Using a password on the command-line interface can be insecure.
Which two methods are available to avoid the warning? (Choose two.)

To query two system variables, you execute this statement and get the results shown:

When you execute the following two statements, only the first one succeeds:
SET @@autocommit=0;
SET @@max_connections=200;
Why does the second statement fail?

The MySQL instance is a default RPM installation on a Linux server.
Where are the errors written?

One of your colleagues is trying to make a change using the mysql command-line client for his or her application session.
The colleague instant messages you this command:
mysql> SET SESSION max_connections = 200;
Why does the command fail?

SQL injection is a common security threat.
Which two methods would help protect against this risk? (Choose two.)

You are installing MySQL Server 5.7 from a tarball package. You have already set up the correct PATH environment variable and configured your /etc/my.cnf file.
Which command will correctly prepare a data directory?

On a master server that is using statement-based replication, a table of log data has become very large.
You decide to delete 100.000 rows.
Which two methods can be independently invoked to ensure that the delete is properly propagated to the slave? (Choose two.)