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The Oracle 1z1-908 exam is designed for individuals who want to demonstrate their expertise in MySQL 8.0 database administration. This exam is ideal for individuals who are already working as database administrators or those who want to advance their career in this field. The exam measures the candidate’s knowledge of MySQL 8.0 architecture, management, and optimization techniques.
NEW QUESTION # 27
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:
Which statement is true?
- A. Replication will fail because of inconsistent numbers in cccccccc-cccc-cccc-cccc-cccccccccccc GTIDs.
- B. Replication will fail because the master has already purged transactions with cccccccc-cccc-cccc- cccc-cccccccccccc GTIDs.
- C. Replication will work.
- D. Replication will fail because the master does not have the required transaction with bbbbbbbb-bbbb- bbbb-bbbb-bbbbbbbbbbbb GTIDs in its binary logs.
- E. Replication will fail because the slave has purged more aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa transactions than the master.
Answer: E
NEW QUESTION # 28
Examine these InnoDB Cluster parameter settings:
Now examine the partial status:
A permanent network failure isolates host3.
Which two statements are true? (Choose two.)
- A. The issuing command cluster.switchToMuitiPrimaryMode() will fail to enable multi-primary mode.
- B. The primary instance can be specified by using the command
cluster.setPrimaryInstance(<host>:<port>). - C. Failure of the instance deployed on host1 provokes an outage.
- D. The instance deployed on host2 is elected as the new primary instance.
- E. The instance deployed on host3 will automatically rejoin the cluster when connectivity is re-established.
- F. The instance deployed on host3 is expelled from the cluster and must be rejoined using cluster.addInstance ('host3:3377')
Answer: B,E
NEW QUESTION # 29
Your MySQL server is running on the Microsoft Windows platform.
Which three local connection protocols are available to you? (Choose three.)
- A. shared memory
- B. SOCKET
- C. TCP/IP
- D. X Protocol
- E. named pipes
- F. UDP
Answer: A,C,E
NEW QUESTION # 30
Which two statements are true about MySQL server multi-source replication? (Choose two.)
- A. It is not compatible with auto-positioning.
- B. It needs to be re-instanced after a crash to maintain consistency.
- C. It does not attempt to detect or resolve replication conflicts.
- D. It relies on relay_log_recovery for resilient operations.
- E. It must use GTID replication.
- F. It uses only time-based replication conflict resolution.
Answer: E,F
NEW QUESTION # 31
Examine these commands and output:
Which connection ID is holding the metadata lock?
- A. 0
- B. 1
- C. 2
- D. 3
- E. 4
- F. 5
Answer: B
NEW QUESTION # 32
Examine this statement and output:
Which two SQL statements can jsmith execute? (Choose two.)
- A. UPDATE world.country SET Name='all';
- B. UPDATE world.country SET Name='one' LIMIT 1;
- C. UPDATE world.country SET Name='new' WHERE Name='old';
- D. UPDATE world.country SET Name='first' ORDER BY Name LIMIT
- E. UPDATE world.country SET Name=CONCAT('New ',Name);
Answer: A,C
NEW QUESTION # 33
You have configured GTID-based asynchronous replication with one master and one slave.
A user accidentally updated some data on the slave.
To fix this, you stopped replication and successfully reverted the accidental changes.
Examine the current GTID information:
You must fix GTID sets on the slave to avoid replicating unwanted transactions in case of failover.
Which set of actions would allow the slave to continue replicating without erroneous transactions?
RESET MASTER;
- A. SET GLOBAL gtid_purged-aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-2312;
SET GLOBAL gtid_executed=aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-10167;
RESET SLAVE; - B. SET GLOBAL gtid_purged=aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-3820;
SET GLOBAL gtid_executed=aaaaaaaa-aaaa-aaaa-aaaa—aaaaaaaaaaaa:1-10300;
RESET MASTER; - C. SET GLOBAL gtid_purged=aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-10167;
- D. bbbb-bbbb-bbbb-bbbbbbbbbbbb:1-9;
SET GLOBAL gtid_executed=aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-10167;
RESET SLAVE; - E. SET GLOBAL gtid_purged=aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-10167;
SET GLOBAL gtid_purged=aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-2312,bbbbbbbb-
Answer: A
NEW QUESTION # 34
Which two are use cases of MySQL asynchronous replication? (Choose two.)
- A. You can scale reads by adding multiple slaves.
- B. It guarantees near real-time replication between a master and a slave.
- C. MySQL Enterprise Backup will automatically back up from an available slave.
- D. You can scale writes by creating a replicated mesh.
- E. It allows backup to be done on the slave without impacting the master.
Answer: A,E
NEW QUESTION # 35
There are five MySQL instances configured with a working group replication.
Examine the output of the group members:
Which two statements are true about network partitioning in the cluster? (Choose two.)
- A. A manual intervention to force group members to be only the working two instances is required.
- B. The cluster will shut down to preserve data consistency.
- C. The cluster has built-in high availability and updates group_replication_ip_whitelistto remove the unreachable nodes.
- D. There could be both a 2 node and 3 node group replication still running, so shutting down group replication and diagnosing the issue is recommended.
- E. The group replication will buffer the transactions on the online nodes until the unreachable nodes return online.
Answer: B,C
NEW QUESTION # 36
You have upgraded the MySQL binaries from 5.7.28 to 8.0.18 by using an in-place upgrade.
Examine the message sequence generated during the first start of MySQL 8.0.18:
Which step or set of steps will resolve the errors?
- A. Execute: mysqlcheck --repair mysql columns_priv event proc proxies_priv tables_priv.
- B. Go to the <datadir>/mysql directory and execute: myisamchk --update-state columns_priv event proc proxies_priv tables_priv.
- C. Remove the redo logs. Replace the MySQL binaries with the 5.7.28 binaries. Prepare the tables for upgrade. Upgrade to 8.0.18 again.
- D. Execute: mysqlcheck --check-upgrade mysql columns_priv event proc proxies_priv tables_priv.
- E. Start mysqld again using the --upgrade=FORCE option.
Answer: E
NEW QUESTION # 37
Which three are characteristics of a newly created role? (Choose three.)
- A. It is stored in the mysql.role table.
- B. It can be granted to user accounts.
- C. It can be renamed using the RENAME ROLE statement.
- D. It can be protected with a password.
- E. It can be dropped using the DROP ROLE statement.
- F. It is created as a locked account.
Answer: B,D,E
Explanation:
Explanation
https://dev.mysql.com/doc/refman/8.0/en/roles.html
https://www.mysqltutorial.org/mysql-roles/
NEW QUESTION # 38
A valid raw backup of the shop.customers MyISAM table was taken.
You must restore the table. You begin with these steps:
1. Confirm that secure_file_priv='/var/tmp'
2. mysql> DROP TABLE shop.customers;
3. shell> cp /backup/customers.MY* /var/lib/mysql/shop/
Which two actions are required to complete the restore? (Choose two.)
- A. mysql> ALTER TABLE shop.customers DISCARD TABLESPACE
- B. shell> cp /backup/customers.frm /var/lib/mysql/shop/
- C. shell> cp /backup/customers.sdi /var/lib/mysql/shop/
- D. mysql> IMPORT TABLE FROM /var/tmp/customers.sdi
- E. mysql> SOURCE '/var/tmp/customers.sdi'
- F. mysql> ALTER TABLE shop.customers IMPORT TABLESPACE
- G. mysql> IMPORT TABLE FROM /var/lib/mysql/shop/customers.sdi
- H. shell> cp /backup/customers.sdi /var/tmp
Answer: D,F
NEW QUESTION # 39
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 metadata. Please use the most up to date instance: 'host1:3377'.
(RuntimeError)
Which statement is true?
- A. The cluster is running and there is at least one ONLINE instance.
- B. The active session instance is invalid and must be re-created by using the command shell.connect ('host3:3377').
- C. The instance deployed on host3 must be rebuilt with a backup from the primary instance.
- D. It is possible to determine the most up-to-date instance by comparing different global transaction identifier (GTID) sets with GTID_SUBSET(set1,set2).
- E. The instance deployed on host3 must be synchronized from a donor deployed on host1 by using the command cluster.addInstance('host1:3377').
Answer: E
NEW QUESTION # 40
Which three are characteristics of a newly created role? (Choose three.)
- A. It can be dropped using the DROP ROLEstatement.
- B. It is stored in the mysql.roletable.
- C. It can be granted to user accounts.
- D. It can be protected with a password.
- E. It is created as a locked account.
- F. It can be renamed using the RENAME ROLEstatement.
Answer: A,C,D
Explanation:
Explanation/Reference:
NEW QUESTION # 41
Examine Joe's account:
CREATE USER 'joe'@'%' IDENTIFIED BY '*secret*'
GRANT ALL PRIVILEGES ON *.* TO 'joe'@'%'
All existing connections for joe are killed.
Which two commands will stop joe establishing access to the MySQL instance? (Choose two.)
- A. ALTER USER 'joe'@'%' PASSWORD HISTORY 0
- B. REVOKE USAGE ON *.* FROM 'joe'@'%'
- C. ALTER USER 'joe'@'%' IDENTIFIED BY '*invalid*' PASSWORD EXPIRE
- D. ALTER USER 'joe'@'%' ACCOUNT LOCK
- E. REVOKE ALL PRIVILEGES ON *.* FROM 'joe'@'%'
- F. ALTER USER 'joe'@'%' SET password='*invalid*'
Answer: C,E
NEW QUESTION # 42
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. mysqld_safe prohibits commands that would harm the operation of the server. An error would be returned by the kill command.
- C. kill -15 carries out a normal shutdown process, such as mysqladmin shutdown.
- D. kill -15 should be avoided. Use other methods such as mysqladmin shutdown or systemctl stop mysqld.
Answer: C
NEW QUESTION # 43
You execute this command:
shell> mysqlpump --exclude-databases=% --users
Which statement is true?
- A. It returns an error because the mysqldump command should have been used.
- B. It creates a logical backup of all metadata, but contains no table data.
- C. It creates a logical backup of only the users database.
- D. It creates a logical backup of all MySQL user accounts.
Answer: B
NEW QUESTION # 44
The mysqld instance has the connection control plugin enabled with these settings:
connection_control_min_connection_delay=1000 connection_control_max_connection_delay=2000 The minimum and maximum delays need to be increased to 3000 and 5000, respectively.
A command is executed:
mysql> SET GLOBAL connection_control_min_connection_delay=3000;
What is the result?
- A. The minimum connection value is changed to 2000.
- B. An error is returned.
- C. The minimum value increases to 3000 and the maximum value increases to 4000.
- D. Only the minimum connection value is increased to 3000.
Answer: D
NEW QUESTION # 45
Examine this MySQL client command to connect to a remote database:
mysql -h remote.example.org -u root -p --protocol=TCP --ssl-mode=
Which two --ssl-mode values will ensure that an X.509-compliant certificate will be used to establish the SSL/TLS connection to MySQL?
- A. VERIFY_CA
- B. PREFERRED
- C. VERIFY_IDENTITY
- D. DISABLED
- E. REQUIRED
Answer: A,C
Explanation:
Explanation
https://dev.mysql.com/doc/refman/5.7/en/using-encrypted-connections.html
NEW QUESTION # 46
You want to check the values of the sort_buffer_sizesession variables of all existing connections.
Which performance_schematable can you query?
- A. session_variables
- B. user_variables_by_thread
- C. global_variables
- D. variables_by_thread
Answer: A
Explanation:
Explanation/Reference: https://dev.mysql.com/worklog/task/?id=6629
NEW QUESTION # 47
You are using mysqlcheck for server maintenance.
Which two statements are true? (Choose two.)
- A. The mysqlcheck --check --all-databases command takes table write locks while performing a series of checks.
- B. The mysqlcheck command can be renamed mysqlrepair so that it repairs tables by default.
- C. The mysqlcheck --optimize --all-databases command reclaims free space from table files.
- D. The mysqlcheck --repair --all-databases command can repair an InnoDB corrupted table.
- E. The mysqlcheck --analyze --all-databases command performs a series of checks to spot eventual table corruptions.
Section: (none)
Explanation
Answer: B,E
NEW QUESTION # 48
User account baduser@hostname on your MySQL instance has been compromised.
Which two commands stop any new connections using the compromised account? (Choose two.)
- A. ALTER USER baduser@hostname IDENTIFIED WITH mysql_no_login;
- B. ALTER USER baduser@hostname DEFAULT ROLE NONE;
- C. ALTER USER baduser@hostname MAX_USER_CONNECTIONS 0;
- D. ALTER USER baduser@hostname PASSWORD DISABLED;
- E. ALTER USER baduser@hostname ACCOUNT LOCK;
Answer: A,E
NEW QUESTION # 49
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The Oracle 1Z0-908 exam is designed to test the knowledge and skills of individuals who aspire to become a MySQL 8.0 database administrator. This certification exam is offered by Oracle, a global technology company that specializes in developing enterprise software products and cloud-based services. The exam covers a wide range of topics related to MySQL 8.0 database administration, including installation, configuration, management, and optimization.
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