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Welcome to Oracle 1Z0-908 practice test online

QUESTION 1
You encountered an insufficient privilege error in the middle of a long transaction.
The database administrator is informed and immediately grants the required privilege:
GRANT UPDATE ON world.city TO `user1\\’;
How can you proceed with your transaction with the least interruption?
A. Roll back the transaction and start the transaction again in the same session.
B. Re-execute the failed statement in your transaction.
C. Change the default database and re-execute the failed statement in your transaction.
D. Close the connection, reconnect, and start the transaction again.
Correct Answer: B

QUESTION 2
Examine this command, which executes successfull mysqlbackup –defaults-file=/backups/server-my.cnf –backupdir=/backups/full copy-back Which statement is true about the copy-back process?
A. The copy-back process is used to overwrite a new backup over an existing backup.
B. It restores files from the data directory to their original MySQL server locations.
C. It restores files from the backup directory to their original MySQL server locations.
D. The copy-back process makes inconsistent backups.
Correct Answer: AC
Reference: https://dev.mysql.com/doc/mysql-enterprise-backup/3.11/en/restore.restore.html

QUESTION 3
Examine this command, which executes successfully:
mysqlpump -–user=root –password > full_backup.sql
Which two databases will be excluded from this dump? (Choose two.)
A. information_schema
B. world
C. employee
D. sys
E. mysql
Correct Answer: AD
Reference: https://mysqlserverteam.com/introducing-mysqlpump/

QUESTION 4
Which two statements are true about using backups of the binary log? (Choose two.)
A. Multiple binary logs can be used to restore data.
B. Multiple binary logs can be applied in parallel for faster data restoration.
C. Binary logs are relatively small, and therefore, excellent for long-term storage and disaster recovery.
D. Binary logs can always be used to unapply unwanted schema changes.
E. They allow for point-in-time recovery of the data.
Correct Answer: DE

QUESTION 5
A colleague complains about the slow response time on your website. Examine this query and output:

What is the most likely cause for the high number of lock waits?
A. You use the MyISAM storage engine for most common tables.
B. You use the InnoDB storage engine and statements wait while data is inserted.
C. The Innodb Buffer pool is full.
D. Your table accesses wait for the operating system level flush.
Correct Answer: B
Reference: https://severalnines.com/database-blog/how-fix-lock-wait-timeout-exceeded-error-mysql

QUESTION 6
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 –optimize –all-databases command reclaims free space from table files.
C. The mysqlcheck –repair –all-databases command can repair an InnoDB corrupted table.
D. The mysqlcheck command can be renamed mysqlrepair so that it repairs tables by default.
E. The mysqlcheck –analyze –all-databases command performs a series of checks to spot eventual table corruptions.
Correct Answer: DE

QUESTION 7
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. REQUIRED
B. VERIFY_CA
C. VERIFY_IDENTITY
D. PREFERRED
E. DISABLED
Correct Answer: A

QUESTION 8
Examine these commands and output:

Which connection ID is holding the metadata lock?
B. 24
C. 21
D. 25
E. 22
F. 6
Correct Answer: D

QUESTION 9
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?
A. RESET MASTER; SET GLOBAL gtid_purged=aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-10167;
B. SET GLOBAL gtid_purged=aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-2312,bbbbbbbb-bbbb-bbbbbbbbbbbbbbbbbbbb:1-9; SET GLOBAL gtid_executed=aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:110167;
C. RESET SLAVE; SET GLOBAL gtid_purged=aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-3820; SET GLOBAL
gtid_executed=aaaaaaaa-aaaa-aaaa-aaaa–aaaaaaaaaaaa:1-10300;
D. RESET MASTER; SET GLOBAL gtid_purged-aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-2312; SET GLOBAL
gtid_executed=aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-10167;
E. RESET SLAVE; SET GLOBAL gtid_purged=aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa:1-10167;
Correct Answer: D

QUESTION 10
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. The cluster will shut down to preserve data consistency.
B. The cluster has built-in high availability and updates group_replication_ip_whitelist to remove the unreachable
nodes.
C. The group replication will buffer the transactions on the online nodes until the unreachable nodes return online.
 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. A manual intervention to force group members to be only the working two instances is required.
Correct Answer: AB

QUESTION 11
You wish to protect your MySQL database against SQL injection attacks.
Which method would fail to do this?
A. installing and configuring the Connection Control plugin
B. avoiding concatenation of SQL statements and user-supplied values in an application
C. using stored procedures for any database access D. using PREPARED STATEMENTS
Correct Answer: C
Reference: https://www.ptsecurity.com/ww-en/analytics/knowledge-base/how-to-prevent-sql-injectionattacks/

QUESTION 12
Examine this MySQL Shell command: dba.rebootClusterFromCompleteOutage()
Which two statements are true? (Choose two.)
A. It reconfigures InnoDB Cluster if the cluster was stopped.
B. It performs InnoDB Cluster instances rolling restart.
C. It only starts all InnoDB Cluster instances.
D. It is not mandatory that all instances are running and reachable before running the command.
E. It stops and restarts all InnoDB Cluster instances and initializes the metadata.
F. It only stops and restarts all InnoDB Cluster instances.
G. It picks the minimum number of instances necessary to rebuild the quorum and reconfigures InnoDB Cluster.
Correct Answer: BD

QUESTION 13
Which three statements are true about MySQL replication? (Choose three.)
A. Replication can use only TCP/IP connections.
B. Any instance can have multiple slaves, but it can have only one master.
C. Each instance in a replication topology must have a unique server ID.
D. Binary logs contain only transactions originating from a single MySQL instance.
E. Each slave must have its own MySQL user for replication.
F. Binary logging must be enabled on the master in order to replicate to other instances.
G. A replication user must have the SELECT privilege for all tables that need to be replicated.
Correct Answer: CFG

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