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MYSQL 8.0 OCP 1z0-908 题库.pdf
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MySQL 8.0 OCP 1Z0-908
Q1.Examine this command, which executes successfully:
mysqlbackup --user=dba --password --port=3306 --with-timestamp --backup-dir=/export/backups
backup-and-apply-log
Which statement is true?
A)The backup accesses the MySQL server files by using a pre-existing connection.
B)The database server is put into a read-only state for the duration of the backup.
C)An offline backup of InnoDB tables is taken.
D)The backup can be impacted when DDL operations run during the backup.
Answer:D
Q2.You reconfigure and start a slave that was not replicating for several days.
The configuration file and CHANGE MASTER command are correct. Examine the GTID information from both master
and slave:
Master:
Gtids_executed: aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-321,
bbbbbbbb-bbbb-bbbb-bbbbbbbbbbbb:1-50,
Cccccccc-cccc-cccc-cccc-cccccccccccc:1234-1237
Gtids_purged: aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-100,
bbbbbbbb-bbbb-bbbb-bbbbbbbbbbbb:1-10,
cccccccc-cccc-cccc-cccc-cccccccccccc:1234-1237
Slave:
Gtids_executed: aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-160,
cccccccc-cccc-cccc-cccc-cccccccccccc:1234-1237
Gtids_executed: aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-70,
cccccccc-cccc-cccc-cccc-cccccccccccc:1234-1237
Which statement is true?
A)Replication will fail because the master does not have the required transaction with
bbbbbbbb-bbbb-bbbb-bbbb-bbbbbbbbbbbb GTIDs in its binary logs.
B)Replication will fail because the master has already purged transactions with cccccccc-cccc-cccc-cccc-cccccccccc
GTIDs.
C)Replication will fail because of inconsistent numbers in cccccccc-cccc-cccc-cccc-cccccccccccc GTIDs.
D)Replication will fail because the slave has purged more aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa transactions than the
master.
F)Replication will work.
Answer:A
Q3.Which two authentication plugins require the plain text client plugin for authentication to work?
A)Windows Native authentication
B)PAM authentication
C)LDAP SASL authentication
D)LDAP authentication
E)SHA256 authentication
F)MySQL Native Password
Answer:BD
Q4.You want to log only the changes made to the database objects and data on the MySQL system. Which log will do
this by default?
A)error log
B)slow query log
C)general query log
D)binary log
E)audit log
Answer:D
Q5.You have an installation of MySQL 8 on Oracle Linux. Consider the outputs:
Mysql>SHOW GLOBAL VARIABLES
WHERE Varisble_name=’tmpdir ‘
OR Variable_name =’ tmp_table_size;
+------------------+-----------+
| Variable_name |Value |
+------------------------+-----+
|tmp_tabe_size | 16777216|
|tmpdir | /tmp |
+-------------------+----------+
Shell>cd/var/lib/mysql
Shell>ls -1|grep temp
Drwxr-x---.2 mysql mysql 4096 Dec 11 14:05 #innodb_temp
Which statement is true about disk temporary tables for this installation?
A)Temporary tables are created in tmpdir only if configured to use MyISAM。
B)Temporary tables are created in tmpdir only after they reach tmp_table_size.
C)Temporary tables will use the InnoDB temporary tablespace located in datadir.
D)Only internal temporary tables from the optimizer will be created in tmpdir.
E)Temporary tables will use the InnoDB temporary tablespace located in /tmp.
Answer:C
Q6.Which two actions will secure a MySQL server from network-based attacks?
A)Use MySQL Router to proxy connections to the MySQL server.
B)Place the MySQL instance behind a firewall.
C)Use network file system (NFS) for storing data.
D)Change the listening port to 3307.
E)Allow connections from the application server only.
Answer:BE
Q7.Examine the command, which execute successfully:
shell> mysqld --initialize-insecure
Which statement is true?
A)The installation creates a temporary test environment with data in the /tmp directory.
B)The installation is created without enforcing or generating SSL certificates.
C)The root password is created in the error log in plain text.
D)The root password is not created allowing easy access from the same host.
E)The root password is not created allowing easy access from the same host.
Answer:D
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