Oracle 1Z0-888 問題集

質問 1：
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?
A. The slave user does not have INSERT, UPDATE, or DELETE permission and cannot execute the Write_rows function.
B. The slave was created with mysqldump -u root -p --skip-lock-tables -all-databases > /data/data.sql
C. The applications have the SUPER privilege, which allows them to update rows.
D. For tables with UNIQUE keys, statement-based replication must be used to maintain integrity.
E. The root user on the slave has executed FLUSH LOGS, causing the relay-log to doublewrite.
正解：B,D

質問 2：
You need to dump the data from the master server and import it into a new slave server.
Which mysqldump option can be used when dumping data from the master server in order to include the master server's binary log information?
A. include-master-info
B. include-log-file
C. master-binlog
D. master-data
正解：D

質問 3：
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?
A. max_connections is not a dynamic variable. You need to change the config file and restart the database.
B. Its current user does not have the SUPER privilege.
C. max_connections requires the GLOBAL scope.
D. Users can control only the max_user_connections variable.
正解：C

質問 4：
You have a server that has very limited memory but has a very large table.
You will use mysqldump to back up this table.
Which option will ensure mysqldump will process a row at a time instead of buffering a set of rows?
A. --single-transaction
B. --tab
C. --quick
D. --skip-buffer
正解：C
解説: (Topexam メンバーにのみ表示されます)

質問 5：
Which two statements are true about MySQL when it has been started using the --skip-grant-tables option? (Choose two.)
A. MySQL becomes read-only except for setting passwords.
B. User authentication is based on the operating system username.
C. Only the password for active account can be changed.
D. All users have unrestricted access.
E. All connections succeed regardless of the username and password.
正解：D,E
解説: (Topexam メンバーにのみ表示されます)