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NEW QUESTION 34
Binary log events for the ‘mydb1’ schema must be copied to a different schema name ‘mydb2’.
Which command will do this?
- A. mysqlbinlog --datebase=mydb1 --database=mydb2 | mysql
- B. mysqlbinlog --rewrite-db=’mydb1’ --rewrite-db=’mydb2’ | mysql
- C. mysqlbinlog --read-from-remote-server --raw | sed ‘s/mydb1/mydb2/g’ | mysql
- D. mysqlbinlog --rewrite-db=’mydb1->mydb2’ | mysql
Answer: C
NEW QUESTION 35
A MySQL server is monitored using MySQL Enterprise Monitor's agentless installation.
Which three features are available with this installation method? (Choose three.)
- A. disk usage and disk characteristics including disk advisors warnings
- B. operating system memory utilization
- C. security-related advisor warnings
- D. CPU utilization
- E. MySQL Replication monitoring
- F. network-related information and network characteristics
- G. MySQL Query Analysis data
Answer: A,C,G
NEW QUESTION 36
Consider this shell output and executed commands:
[root@oel7 ~]# ps aux | grep mysqld
mysql 2076 3.5 24.6 1386852 372572 ? Ssl 12:01 0:01 /usr/sbin/mysqid
[root@oel7 ~]# kill -15 2076
Which statement is true about MySQL server shutdown?
- A. kill -15 and kill -9 are effectively the same forced shutdown that risk committed transactions not written to disk.
- B. kill -15 should be avoided. Use other methods such as mysqladmin shutdown or systemctl stop mysqld.
- C. mysqld_safe prohibits commands that would harm the operation of the server. An error would be returned by the kill command.
- D. kill -15 carries out a normal shutdown process, such as mysqladmin shutdown.
Answer: D
NEW QUESTION 37
Which two are true about binary logs used in asynchronous replication? (Choose two.)
- A. They contain events that describe only administrative commands run on the master.
- B. They are pulled from the master to the slave.
- C. They contain events that describe database changes on the master.
- D. They contain events that describe all queries run on the master.
- E. They are pushed from the master to the slave.
Answer: C,E
Explanation:
Explanation/Reference: https://www.oracle.com/technetwork/community/developer-day/mysql-replication-presentation-
485890.pdf (14)
NEW QUESTION 38
You are using mysqlcheck for server maintenance.
Which two statements are true? (Choose two.)
- A. The mysqlcheck --optimize --all-databases command reclaims free space from table files.
- B. The mysqlcheck --check --all-databases command takes table write locks while performing a series of checks.
- C. The mysqlcheck --repair --all-databases command can repair an InnoDB corrupted table.
- D. The mysqlcheck --analyze --all-databases command performs a series of checks to spot eventual table corruptions.
Section: (none)
Explanation - E. The mysqlcheck command can be renamed mysqlrepair so that it repairs tables by default.
Answer: D,E
NEW QUESTION 39
Examine this command and output:
Which two options will improve the security of the MySQL instance? (Choose two.)
- A. Remove the world read/execute privilege from the accounting directory.
- B. Change the group ownership of the mysql directory to the mysql user group.
- C. Remove group read/write privileges from the private_key.pem file.
- D. Remove world read privileges from the server-cert.pem certificate file.
- E. Change the parent directory owner and group to mysql.
- F. Remove world read privileges from the public_key.pem file.
Answer: B,E
NEW QUESTION 40
Examine these entries from the general query log:
All UPDATE statements reference existing rows.
Which describes the outcome of the sequence of statements?
- A. Connection 25 experiences a lock wait timeout.
- B. A deadlock occurs after innodb_lock_wait_timeout seconds.
- C. Connection 24 experiences a lock wait timeout.
- D. All statements execute without error.
- E. A deadlock occurs immediately.
Answer: B
NEW QUESTION 41
Which statement is true about InnoDB persistent index statistics?
- A. Tables are scanned and index statistics recalculated when an instance is restarted.
- B. Setting innodb_stats_auto_recalc=ON causes statistics to be updated automatically when a new index is created.
- C. Index statistics are calculated from pages buffered in the buffer pool for tables with InnoDB storage engine.
- D. Increasing innodb_stats_persistent_sample_pages determines higher pages scanning speed, at the cost of increased memory usage.
- E. Execution plans based on transient index statistics improve precision when innodb_stats_persistent_sample_pages is increased.
- F. Updating index statistics is an I/O expensive operation.
Answer: E
NEW QUESTION 42
Which two queries are examples of successful SQL injection attacks? (Choose two.)
- A. SELECT email,passwd FROM members
WHERE email = 'INSERT INTO members('email','passwd') VALUES ('[email protected]',
'secret');--'; - B. SELECT id, name FROM user WHERE id=23 OR id=32 OR 1=1;
- C. SELECT user,passwd FROM members
WHERE user = '?';INSERT INTO members('user','passwd') VALUES
('[email protected]','secret');--'; - D. SELECT id, name FROM user WHERE id=23 OR id=32 AND 1=1;
- E. SELECT id, name FROM user WHERE user.id=(SELECT members.id FROM members);
- F. SELECT user, phone FROM customers WHERE name = '\; DROP TABLE users; --';
Answer: A,D
NEW QUESTION 43
Examine this command, which executes successfully:
$ mysqlrouter --bootstrap user@hostname:port --directory=directory_path Which activity is performed?
- A. MySQL Router configures itself based on the information retrieved from the InnoDB cluster metadata server.
- B. MySQL Router is configured based on the information in files in directory_path.
- C. MySQL Router configures all the cluster nodes based on the information retrieved from the InnoDB cluster metadata server.
- D. MySQL Router is restarted.
Answer: A
Explanation:
Explanation/Reference: https://dev.mysql.com/doc/mysql-router/8.0/en/mysqlrouter.html
NEW QUESTION 44
You made some table definition changes to a schema in your MySQL Server.
Which two statements reflect how MySQL Server handles the table definition changes? (Choose two.)
- A. MySQL Server stores a copy of the serialized data in the InnoDB user tablespace.
- B. MySQL implicitly executes FLUSH TABLES and stores a snapshot backup of the metadata.
- C. The metadata is serialized in JSON format in Serialized Dictionary Information (SDI).
- D. MySQL keeps InnoDB metadata changes in .sdi files in datadir.
- E. MySQL writes SDI to the binary log for distributed backups.
Answer: A,C
NEW QUESTION 45
Which two storage engines provide a view of the data consistent with the storage system at any moment?
(Choose two.)
- A. InnoDB
- B. MEMORY
- C. ARCHIVE
- D. NDB
- E. MyISAM
Answer: B,E
Explanation:
Explanation/Reference: https://zetcode.com/mysql/storageengines/
NEW QUESTION 46
Which command enables rule-based MySQL Auditing capabilities?
- A. shell> mysql < audit_log_filter_linux_install.sql
- B. shell> mysqld --initialize --log-raw=audit.log
- C. mysql> INSTALL COMPONENT audit_log;
- D. mysql> INSTALL PLUGIN audit_log;
Answer: A
Explanation:
Explanation/Reference: https://dev.mysql.com/doc/mysql-security-excerpt/5.7/en/audit-log-filtering.html
NEW QUESTION 47
Which two are use cases of MySQL asynchronous replication? (Choose two.)
- A. MySQL Enterprise Backup will automatically back up from an available slave.
- B. It guarantees near real-time replication between a master and a slave.
- C. You can scale writes by creating a replicated mesh.
- D. You can scale reads by adding multiple slaves.
- E. It allows backup to be done on the slave without impacting the master.
Answer: D,E
NEW QUESTION 48
Examine this command and output:
Which two options will improve the security of the MySQL instance? (Choose two.)
- A. Remove world read privileges from the server-cert.pemcertificate file.
- B. Remove the world read/execute privilege from the accountingdirectory.
- C. Remove world read privileges from the public_key.pemfile.
- D. Change the parent directory owner and group to mysql.
- E. Change the group ownership of the mysqldirectory to the mysqluser group.
- F. Remove group read/write privileges from the private_key.pemfile.
Answer: D,E
NEW QUESTION 49
Examine this statement, which executes successfully:
You want to improve the performance of this query:
Which change enables the query to succeed while accessing fewer rows?
- A. ALTER TABLE world.city ADD FULLTEXT INDEX (Population);
- B. ALTER TABLE world.city ADD INDEX (Name);
- C. ALTER TABLE world.city ADD FULLTEXT INDEX (Name);
- D. ALTER TABLE world.city ADD SPATIAL INDEX (Population);
- E. ALTER TABLE world.city ADD SPATIAL INDEX (Name);
- F. ALTER TABLE world.city ADD INDEX (Population);
Answer: D
NEW QUESTION 50
An attempt to recover an InnoDB Cluster fails.
Examine this set of messages and responses:
host3:3377 ssl JS > dba.rebootClusterFromCompleteOutage() Reconfiguring the default cluster from complete outage...
The instance 'host1:3377'' was part of the cluster configuration. Would you like to rejoin it to the cluster? [y/N]: y The instance 'host2:3377' was part of the cluster configuration. Would you like to rejoin it to the cluster? [y/N]: y Dba.rebootClusterFromCompleteOutage: The active session instance isn't the most updated in comparison with the ONLINE instances of the Cluster's metadat a. Please use the most up to date instance: 'host1:3377'. (RuntimeError) Which statement is true?
- A. The instance deployed on host3 must be synchronized from a donor deployed on host1 by using the command cluster.addInstance('host1:3377').
- B. It is possible to determine the most up-to-date instance by comparing different global transaction identifier (GTID) sets with GTID_SUBSET(set1,set2).
- C. The instance deployed on host3 must be rebuilt with a backup from the primary instance.
- D. The cluster is running and there is at least one ONLINE instance.
- E. The active session instance is invalid and must be re-created by using the command shell.connect ('host3:3377').
Answer: A
NEW QUESTION 51
You want to check the values of the sort_buffer_sizesession variables of all existing connections.
Which performance_schematable can you query?
- A. variables_by_thread
- B. global_variables
- C. session_variables
- D. user_variables_by_thread
Answer: C
Explanation:
Explanation/Reference: https://dev.mysql.com/worklog/task/?id=6629
NEW QUESTION 52
Examine this SQL statement:
mysql> GRANT r_read@localhost TO mark WITH ADMIN OPTION;
Which two are true? (Choose two.)
- A. Mark can grant the r_read@localhost role to another user.
- B. Mark can revoke the r_read@localhost role from another role.
- C. Mark must connect from localhost to activate the r_read@localhost role.
- D. Mark can grant the privileges assigned to the r_read@localhost role to another user.
- E. ADMIN OPTION allows Mark to drop the role.
- F. ADMIN OPTION causes the role to be activated by default.
Answer: D,E
NEW QUESTION 53
Examine the modified output:
Seconds_Behind_ Mastervalue is steadily growing.
What are two possible causes? (Choose two.)
- A. The master is most probably too busy to transmit data and the slave needs to wait for more data.
- B. This value shows only I/O latency and is not indicative of the size of the transaction queue.
- C. One or more large tables do not have primary keys.
- D. The parallel slave threads are experiencing lock contention.
- E. The master is producing a large volume of events in parallel but the slave is processing them serially.
Answer: B,E
Explanation:
Explanation
NEW QUESTION 54
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