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Oracle 1Z0-908 (MySQL 8.0 Database Administrator) certification exam is an excellent choice for professionals who work with MySQL databases and wish to demonstrate their expertise in this area. By passing 1z1-908 exam, candidates can gain a competitive edge in the job market and demonstrate their commitment to ongoing professional development.
NEW QUESTION # 68
A clean shutdown was performed with innodb_fast_shutdown=0.
While you were manipulating files, all files were accidentally deleted from the top-level data directory.
Which two files must be restored from backup to allow the DB to restart cleanly? (Choose two.)
- A. undo_001
- B. mysql.ibd
- C. ib_buffer_pool
- D. ibdata1
- E. ibtmp1
- F. ib_logfile0
Answer: B,C
NEW QUESTION # 69
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 instance deployed on host2 is elected as the new primary instance.
- C. Failure of the instance deployed on host1 provokes an outage.
- D. The instance deployed on host3 will automatically rejoin the cluster when connectivity is re-established.
- E. The primary instance can be specified by using the command
cluster.setPrimaryInstance(<host>:<port>). - F. The instance deployed on host3 is expelled from the cluster and must be rejoined using cluster.addInstance ('host3:3377')
Answer: D,E
NEW QUESTION # 70
Examine this list of MySQL data directory binary logs:
binlog.000001
binlog.000002
.....
binlog.000289
binlog.000300
binlog.000301
binlog.index
Now examine this command, which executes successfully:
mysqldump --delete-master-logs --all-databases > /backup/db_backup.sql
Which two are true? (Choose two.)
- A. All databases are backed up to the output file.
- B. All databases, excluding master metadata, are backed up to the output file.
- C. All details regarding deleted logs and master metadata are captured in the output file.
- D. All binary logs are deleted from the master.
- E. All binary logs are backed up and then deleted.
- F. All non-active binary logs are removed from the master.
Answer: B,D
NEW QUESTION # 71
You want to dump all databases with names that start with "db".
Which command will achieve this?
- A. mysqlpump --include-tables=db.% --result-file=all_db_backup.sql
- B. mysqlpump --include-databases=db --result-file=all_db_backup.sql
- C. mysqlpump --include-databases=db% --result-file=all_db_backup.sql
- D. mysqlpump > all_db_backup.sql
Answer: B
NEW QUESTION # 72
Which two are true about differences between logical and physical upgrades of MySQL databases? (Choose two.)
- A. Post-upgrade table storage requirements after logical upgrades are usually smaller than that after physical upgrades.
- B. Post-upgrade table storage requirements after physical upgrades are usually smaller than that after logical upgrades.
- C. Physical upgrades leave data in place, whereas logical upgrades require data to be restored from mysqldump-type backups taken before the upgrades.
- D. Physical upgrades are much faster because they do not require restarting the mysqld process.
- E. Logical upgrades are much faster because they do not require restarting the mysqld process.
- F. Physical upgrades are performed for current instances on bare metal deployments, whereas logical upgrades are used for virtual machines or containerized instances.
Answer: C,E
NEW QUESTION # 73
You have just installed MySQL on Oracle Linux and adjusted your /etc/my.cnf parameters to suit your installation.
Examine the output:
What statement is true about the start attempt?
- A. MySQL server was not started due to a problem while executing process 2732.
- B. systemd waited for 30 seconds before timing out and start up failed.
- C. systemd attempted to start mysqld, found another systemd mysqld process running, and shut it down.
- D. MySQL server continued to start up even though another process existed.
- E. systemd found the mysqld service disabled and failed to start it.
Answer: C
NEW QUESTION # 74
A user wants to connect without entering his or her username and password on the Linux command prompt.
Which three locations can be used to store the user's mysql credentials to satisfy this requirement? (Choose three.)
- A. /etc/my.cnf file
- B. DATADIR/mysqld-auto.cnf file
- C. $HOME/.mysql/auth/login file
- D. $HOME/.mysqlrc file
- E. $MYSQL_HOME/my.cnf file
- F. $HOME/.my.cnf file
- G. $HOME/.mylogin.cnf file
Answer: A,B,E
NEW QUESTION # 75
Which two are characteristics of snapshot-based backups? (Choose two.)
- A. Snapshot-based backups greatly reduce time during which the database and applications are unavailable.
- B. A separate physical copy must be made before releasing the snapshot backup.
- C. There is no need for InnoDB tables to perform its own recovery when restoring from the snapshot backup.
- D. The frozen file system can be cloned to another virtual machine immediately into active service.
- E. Snapshot backups can be used only in virtual machines.
Answer: B,E
NEW QUESTION # 76
Which two statements are true about using backups of the binary log? (Choose two.)
- A. They allow for point-in-time recovery of the data.
- B. Multiple binary logs can be used to restore data.
- 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. Multiple binary logs can be applied in parallel for faster data restoration.
Answer: A,D
NEW QUESTION # 77
A colleague complains about 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. Your table accesses wait for the operating system level flush.
- C. The Innodb Buffer pool is full.
- D. You use the InnoDB storage engine and statements wait while data is inserted.
Answer: D
NEW QUESTION # 78
Examine these statements and output:
Which statement is true?
- A. The user is authenticated as the anonymous proxy user ''@'%'.
- B. The user is logged in with --user=accounting as an option.
- C. The user is authorized as the accounting@localhost user.
- D. The user failed to define a username and the connecting username defaulted to ''@'%'.
- E. The user is authorized as the rsmith@localhost user.
Answer: E
NEW QUESTION # 79
You execute this command:
shell> mysqlpump --exclude-databases=% --users
Which statement is true?
- A. It creates a logical backup of only the users database.
- B. It returns an error because the mysqldump command should have been used.
- C. It creates a logical backup of all metadata, but contains no table data.
- D. It creates a logical backup of all MySQL user accounts.
Answer: C
NEW QUESTION # 80
Examine this statement and output:
You must try to reduce query execution time.
Which two queries should you focus on? (Choose two.)
- A. QN = 2
- B. QN = 1
- C. QN = 3
- D. QN = 5
- E. QN = 4
Answer: A,B
NEW QUESTION # 81
Examine this SQL statement:
Which set of privileges will allow Tom to execute this SQL statement?
- A. GRANT UPDATE ON 'world'.'city' TO 'tom'@'%'; GRANT SELECT ON 'world'.* TO 'tom'@'%';
- B. GRANT UPDATE ON 'world'.'city' TO 'tom'@'%'; GRANT SELECT ON 'world'.'country' TO
'tom'@'%'; - C. GRANT UPDATE ON 'world'.* TO 'tom'@'%';
GRANT ALL PRIVILEGES ON 'world'.'country' TO 'tom'@'%'; - D. GRANT ALL PRIVILEGES ON 'world'.'city' TO 'tom'@'%';
GRANT SELECT ('code') ON 'world'.'country' TO 'tom'@'%';
Answer: B
NEW QUESTION # 82
Your MySQL environment has asynchronous position based-replication with one master and one slave.
The slave instance had a disk I/O problem, so it was stopped.
You determined that the slave relay log files were corrupted and unusable, but no other files are damaged.
You restart MySQL Server.
How can replication be restored?
- A. The slave relay logs should be deleted; then execute START SLAVE;
- B. The slave needs to be restored from backup.
- C. The slave relay logs should be deleted; execute CHANGE MASTER to adjust the replication relay log file name, then issue start SLAVE;
- D. The relay logs from the master should be used to replace the corrupted relay logs.
Answer: D
NEW QUESTION # 83
Which two queries are examples of successful SQL injection attacks? (Choose two.) SELECT user,passwd FROM members
- A. WHERE email = ‘INSERT INTO members(‘email’,’passwd’) VALUES
(‘[email protected]’, ‘secret’);--‘;
SELECT user, phone FROM customers WHERE name = ‘\; DROP TABLE users; --‘; - B. SELECT id, name FROM user WHERE id=23 OR id=32 AND 1=1;
- C. SELECT email,passwd FROM members
- D. SELECT id, name FROM user WHERE id=23 OR id=32 OR 1=1;
- E. WHERE user = ‘?’;INSERT INTO members(‘user’,’passwd’) VALUES
(‘[email protected]’,‘secret’);--‘; - F. SELECT id, name FROM user WHERE user.id=(SELECT members.id FROM members);
Answer: B,C
NEW QUESTION # 84
Which three settings control global buffers shared by all threads on a MySQL server? (Choose three.)
- A. sort_buffer_size
- B. table_open_cache
- C. key_buffer_size
- D. innodb_buffer_pool_size
- E. read_buffer_size
- F. tmp_table_size
Answer: A,C,F
NEW QUESTION # 85
Examine this command, which executes successfully:
$ mysqlrouter --bootstrap user@hostname:port --directory=directory_path Which activity is performed?
- A. MySQL Router configures all the cluster nodes 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 is restarted.
- D. MySQL Router configures itself based on the information retrieved from the InnoDB cluster metadata server.
Answer: D
Explanation:
Explanation/Reference: https://dev.mysql.com/doc/mysql-router/8.0/en/mysqlrouter.html
NEW QUESTION # 86
You have a MySQL system with 500 GB of data that needs frequent backups.
You use a mix of MyISAM and InnoDB storage engines for your data.
Examine your backup requirement:
* The MySQL system being backed up can never be unavailable or locked to the client applications.
* The recovery from the backup must work on any system.
* Only 1 hour of data can be lost on recovery of the backup.
Which option fulfills all backup requirements?
- A. Take a physical backup of the MySQL system.
- B. Take your backup from a slave of the MySQL system.
- C. Take a logical backup of the MySQL system.
- D. Use the Clone Plugin to copy the data to another MySQL system.
Answer: C
NEW QUESTION # 87
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To prepare for the Oracle 1Z0-908 exam, candidates can take advantage of various resources available online, including official Oracle training courses, practice exams, and study guides. The official MySQL documentation is also an excellent resource for candidates to familiarize themselves with the database's features and functionality.
To become certified, candidates must pass a rigorous exam that covers a wide range of topics related to MySQL database administration. These topics include database design, security, performance tuning, backup and recovery, and high availability solutions. Candidates must demonstrate a deep understanding of these concepts and be able to apply them in real-world scenarios.
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