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NEW QUESTION 31
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. employee
- B. world
- C. sys
- D. mysql
- E. information_schema
Answer: C,E
Explanation:
Explanation/Reference: https://mysqlserverteam.com/introducing-mysqlpump/
NEW QUESTION 32
Examine this command and output:
Which two statements are true? (Choose two.)
- A. The lock is at the table object level.
- B. The lock is a row-level lock.
- C. The lock is a shared lock.
- D. The lock is at the metadata object level.
- E. The lock is an exclusive lock.
- F. The lock is an intentional lock.
Answer: A,E
NEW QUESTION 33
You are backing up raw InnoDB files by using mysqlbackup.
Which two groups of files will be backed up during a full backup? (Choose two.)
- A. ibbackup files
- B. *.ibd files
- C. *.sdi files
- D. *.CSM files
- E. ib_logfile* files
Answer: B,E
NEW QUESTION 34
You are upgrading a MySQL instance to the latest 8.0 version.
Examine this output:
You plan to add this parameter to the configuration:
innodb_directories=’/innodb_extras’
Which statement is true?
- A. It defines all innodb tablespace options relative to a starting parent directory.
- B. It moves all innodb tablespaces to the /innodb_extrasdirectory to enable a new innodb_data_home_dirto be defined.
- C. It adds more temporary workspace in addition to the innodb_tmpdirlocation.
- D. It is not necessary because innodb_data_home_diris already defined.
- E. It allows scanning of other locations to discover more innodb tablespaces.
Answer: D
NEW QUESTION 35
Which two are use cases of MySQL asynchronous replication? (Choose two.)
- A. It guarantees near real-time replication between a master and a slave.
- B. You can scale writes by creating a replicated mesh.
- C. It allows backup to be done on the slave without impacting the master.
- D. You can scale reads by adding multiple slaves.
- E. MySQL Enterprise Backup will automatically back up from an available slave.
Answer: C,D
NEW QUESTION 36
Which two storage engines provide a view of the data consistent with the storage system at any moment?
(Choose two.)
- A. NDB
- B. ARCHIVE
- C. InnoDB
- D. MEMORY
- E. MyISAM
Answer: D,E
Explanation:
Explanation/Reference: https://zetcode.com/mysql/storageengines/
NEW QUESTION 37
Which two MySQL Server accounts are locked by default? (Choose two.)
- A. any user created without a password
- B. any new ROLE accounts
- C. any internal system accounts
- D. any user created with a username, but missing the host name
- E. any user set as DEFINER for stored programs
Answer: C,E
NEW QUESTION 38
You want to check the values of the sort_buffer_sizesession variables of all existing connections.
Which performance_schematable can you query?
- A. global_variables
- B. variables_by_thread
- C. session_variables
- D. user_variables_by_thread
Answer: C
Explanation:
Explanation/Reference: https://dev.mysql.com/worklog/task/?id=6629
NEW QUESTION 39
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 group replication will buffer the transactions on the online nodes until the unreachable nodes return online.
- B. A manual intervention to force group members to be only the working two instances is required.
- C. The cluster has built-in high availability and updates group_replication_ip_whitelistto remove the unreachable nodes.
- D. The cluster will shut down to preserve data consistency.
- E. 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.
Answer: C,D
NEW QUESTION 40
An existing asynchronous replication setup is running MySQL 8.
Which two steps are a part of implementing GTID replication? (Choose two.)
- A. On the slave, alter the MySQL master connection setting with:
CHANGE MASTER TO MASTER_AUTO_POSITION = 1; - B. Enable GTID by executing this on the master and the slave:
SET GLOBAL GTID_ENABLED=on; - C. Restart MySQL (master and slave) with these options enabled:
--gtid_mode=ON
--log-bin
--log-slave-updates
--enforce-gtid-consistency - D. Execute this on the slave to enable GTID:
START SLAVE IO_THREAD WITH GTID; - E. On the slave, alter the MySQL master connection setting with:
ALTER channel CHANGE MASTER TO MASTER_AUTO_POSITION = 1; - F. Execute this on the slave to enable GTID:
RESET SLAVE; START SLAVE GTID_NEXT=AUTOMATIC;
Answer: A,C
NEW QUESTION 41
The data in this instance is transient; no backup or replication will be required. It is currently under performing.
The database size is static and including indexes is 19G.
Total system memory is 32G.
After profiling the system, you highlight these MySQL status and global variables:
The OS metrics indicate that disk is a bottleneck. Other variables retain their default values.
Which three changes will provide the most benefit to the instance? (Choose three.)
- A. innodb_undo_directory=/dev/shm
- B. sync_binlog=0
- C. buffer_pool_size=24G
- D. max_connections=10000
- E. innodb_flush_log_at_trx_commit=1
- F. innodb_log_file_size=1G
- G. innodb_doublewrite=0
Answer: D,E,F
NEW QUESTION 42
Which two commands will display indexes on the parts table in the manufacturing schema? (Choose two.)
- A. DESCRIBE manufacturing.parts;
- B. SELECT * FROM information_schema.COLUMN_STATISTICS;
- C. SHOW INDEXES FROM manufacturing.parts;
- D. EXPLAIN SELECT INDEXES FROM manufacturing.parts;
- E. SELECT * FROM information_schema.statistics WHERE table_schema='manufacturing' AND TABLE_NAME='parts';
Answer: B,E
NEW QUESTION 43
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. employee
- B. world
- C. sys
- D. mysql
- E. information_schema
Answer: C,E
NEW QUESTION 44
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 dat
a. 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 your backup from a slave of the MySQL system.
- B. Take a logical backup of the MySQL system.
- C. Use the Clone Plugin to copy the data to another MySQL system.
- D. Take a physical backup of the MySQL system.
Answer: B
NEW QUESTION 45
Which step or set of steps can be used to rotate the error log?
- A. Execute SET GLOBAL log_error = ‘<new error log file>’.
- B. Execute SET GLOBAL expire_logs_days=0to enforce a log rotation.
- C. Execute SET GLOBAL max_error_count = <number of messages at point to rotate>.
- D. Rename the error log file on disk, and then execute FLUSH ERROR LOGS.
Answer: D
Explanation:
Explanation/Reference: https://blog.pythian.com/mysql-log-rotation/
NEW QUESTION 46
......
Topics of Oracle 1Z0-908: MySQL 8.0 Database Exam
The Oracle 1Z0-908 exam tests the abilities and knowledge of the candidates by checking the following objectives:
Architecture
- Understand and use the Data Dictionary
- Understand how MySQL stores data
- Configure buffers and caches
- Configure client connections to the server
- Understand how InnoDB stores data and logs
Server Installation and Configuration
- Upgrade MySQL
- Configure MySQL variables
- Start and stop MySQL
- Install and use the MySQL server and client programs
- Launch multiple MySQL servers on the same host
- Configure MySQL by using options and option files
- Identify the files and folders created during the installation
Security
- Configure MySQL Enterprise Firewall
- Secure MySQL server connections
- Prevent SQL injection attacks
- Use authentication plug-ins
- Control user and role permissions
- Create user accounts and roles
- Secure the MySQL host environment
- Recognize common security risks
- Encrypt MySQL data
- Provide the password and login security
Monitoring and Maintenance
- Use MySQL Enterprise Monitor to view activity in MySQL
- Monitor MySQL processes and status
- Configure MySQL Enterprise Audit
- Troubleshoot problems with locked resources
- Configure and view MySQL log files
- Monitor database growth and explain capacity planning
Query Optimization
- Create indexes to improve server performance
- Examine how MySQL optimizes queries
- Analyze queries with MySQL Enterprise Monitor
- Monitor and understand index statistics
Backups and Recovery
- Implement a backup strategy
- Back up the binary log
- Explain when and how to use raw file backups
- Use mysqldump and mysqlpump to perform logical backups
- Backup and restore data with MySQL Enterprise Backup
- Distinguish between the different types of backup
High Availability Techniques
- Describe MySQL InnoDB Cluster and Group Replication
- Monitor and troubleshoot replication
- Explain the role of replication threads
- Configure multisource replication
- Explain how replication provides high availability and scalability
- Perform an InnoDB cluster recovery
- Explain the role of the binary log in replication
- Configure replication
- Configure a MySQL InnoDB cluster
How to book the Oracle 1Z0-908: MySQL 8.0 Database Exam
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