[2023年12月11日]1Z0-908テスト準備できるトレーニング練習テスト試験問題
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MySQL 8.0データベース管理者試験としても知られるOracle 1Z0-908認定試験は、MySQLデータベースの管理におけるスキルと知識を検証したい専門家向けに設計されています。この試験は、データベース管理者、システム管理者、開発者など、さまざまな組織のMySQLデータベースの管理を担当する個人を対象としています。この試験に合格することは、MySQLデータベースの管理に関する専門知識を実証し、キャリアの見通しを強化する素晴らしい方法です。
Oracle 1z1-908試験は、MySQL 8.0データベース管理のすべての側面をカバーする包括的な試験です。試験では、候補者のMySQL 8.0データベースのインストール、設定、およびメンテナンス能力を評価します。また、バックアップおよびリカバリ技術、パフォーマンスチューニング、およびセキュリティ管理の知識もテストされます。この試験は挑戦的で、MySQL 8.0データベース管理の徹底的な理解が必要です。
質問 # 26
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. The Innodb Buffer pool is full.
- B. You use the InnoDB storage engine and statements wait while data is inserted.
- C. You use the MyISAM storage engine for most common tables.
- D. Your table accesses wait for the operating system level flush.
正解：B
質問 # 27
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. REVOKE ALL PRIVILEGES ON *.* FROM 'joe'@'%'
- B. ALTER USER 'joe'@'%' IDENTIFIED BY '*invalid*' PASSWORD EXPIRE
- C. REVOKE USAGE ON *.* FROM 'joe'@'%'
- D. ALTER USER 'joe'@'%' SET password='*invalid*'
- E. ALTER USER 'joe'@'%' ACCOUNT LOCK
- F. ALTER USER 'joe'@'%' PASSWORD HISTORY 0
正解：A、B
質問 # 28
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. The cluster is running and there is at least one ONLINE instance.
- C. The instance deployed on host3 must be rebuilt with a backup from the primary instance.
- D. The active session instance is invalid and must be re-created by using the command shell.connect ('host3:3377').
- E. It is possible to determine the most up-to-date instance by comparing different global transaction identifier (GTID) sets with GTID_SUBSET(set1,set2).
正解：A
質問 # 29
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. Binary logs are relatively small, and therefore, excellent for long-term storage and disaster recovery.
- C. Multiple binary logs can be applied in parallel for faster data restoration.
- D. They allow for point-in-time recovery of the data.
- E. Binary logs can always be used to unapply unwanted schema changes.
正解：D、E
質問 # 30
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 shared lock.
- C. The lock is an intentional lock.
- D. The lock is a row-level lock.
- E. The lock is an exclusive lock.
- F. The lock is at the metadata object level.
正解：A、E
質問 # 31
Which three are types of InnoDB tablespaces? (Choose three.)
- A. undo tablespaces
- B. data tablespaces
- C. schema tablespaces
- D. encryption tablespaces
- E. redo tablespaces
- F. temporary table tablespaces
正解：B、D、F
質問 # 32
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 details regarding deleted logs and master metadata are captured in the output file.
- B. All non-active binary logs are removed from the master.
- C. All databases are backed up to the output file.
- D. All databases, excluding master metadata, are backed up to the output file.
- E. All binary logs are backed up and then deleted.
- F. All binary logs are deleted from the master.
正解：D、F
質問 # 33
Which two statements are true about the binary log encryption feature? (Choose two.)
- A. It requires a keyring plugin.
- B. It can be activated per session.
- C. When enabled it encrypts existing binary logs.
- D. It encrypts any connecting slaves connection thread.
- E. It can be set at run time.
正解：B、D
質問 # 34
Examine this command, which executes successfully:
Which two statements are true? (Choose two.)
- A. The backup operation will finish only when backup-and-apply-log is executed.
- B. A raw backup is created.
- C. A single-file backup is created.
- D. The backup operation will finish only when apply-log is executed.
- E. The --backup-dir option holds temporary output, status, and metadata files.
正解：D、E
質問 # 35
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. Start mysqld again using the --upgrade=FORCE option.
- B. Execute: mysqlcheck --repair mysql columns_priv event proc proxies_priv tables_priv.
- C. Execute: mysqlcheck --check-upgrade mysql columns_priv event proc proxies_priv tables_priv.
- D. Go to the <datadir>/mysql directory and execute: myisamchk --update-state columns_priv event proc proxies_priv tables_priv.
- E. 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.
正解：A
質問 # 36
Where is the default data directory located after installing MySQL using RPM on Oracle Linux 7?
- A. /usr/bin
- B. /usr/mysql
- C. /etc/my.cnf
- D. /usr
- E. /var/lib/mysql
正解：A
質問 # 37
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 logical backup of the MySQL system.
- B. Take your backup from a slave 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.
正解：A
質問 # 38
Examine this command and output:
Which two options will improve the security of the MySQL instance? (Choose two.)
- A. Remove group read/write privileges from the private_key.pem file.
- B. Remove world read privileges from the server-cert.pem certificate file.
- C. Remove the world read/execute privilege from the accounting directory.
- D. Change the parent directory owner and group to mysql.
- E. Remove world read privileges from the public_key.pem file.
- F. Change the group ownership of the mysql directory to the mysql user group.
正解：D、F
質問 # 39
You are considering using file-system snapshots to back up MySQL.
Which three statements are true? (Choose three.)
- A. They allow direct copying of table rows with operating system copy commands.
- B. They take roughly twice as long as logical backups.
- C. There is a slight performance cost while the snapshot is active.
- D. The backup window is almost zero from the perspective of the application.
- E. They do not use additional disk space.
- F. They do not back up views, stored procedures, or configuration files.
- G. They work best for transaction storage engines that can perform their own recovery when restored.
正解：E、F、G
質問 # 40
A MySQL server is monitored using MySQL Enterprise Monitor's agentless installation.
Which three features are available with this installation method? (Choose three.)
- A. CPU utilization
- B. network-related information and network characteristics
- C. MySQL Query Analysis data
- D. operating system memory utilization
- E. MySQL Replication monitoring
- F. security-related advisor warnings
- G. disk usage and disk characteristics including disk advisors warnings
正解：C、F、G
質問 # 41
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 configures itself based on the information retrieved from the InnoDB cluster metadata server.
- C. MySQL Router is restarted.
- D. MySQL Router is configured based on the information in files in directory_path.
正解：B
質問 # 42
Examine these statements and output:
Which statement is true?
- A. The user is logged in with --user=accountingas an option.
- B. The user failed to define a username and the connecting username defaulted to ‘’@’%’.
- C. The user is authorized as the rsmith@localhostuser.
- D. The user is authenticated as the anonymous proxy user ‘’@’%’.
- E. The user is authorized as the accounting@localhostuser.
正解：C
質問 # 43
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