あなたを合格させる1z1-908お手軽に試験合格リアル1z1-908練習問題集で更新されたのは2023年07月17日 [Q48-Q69]

あなたを合格させる1z1-908お手軽に試験合格リアル1z1-908練習問題集で更新されたのは2023年07月17日

2023年最新の実際に出ると確認されたで無料Oracle 1z1-908試験問題

Oracle 1Z0-908の認定試験は、MySQLデータベースコンセプトについての理解と、MySQL 8.0の実践的な経験を持つことが必要なチャレンジングな試験です。試験は80問の複数選択問題から成り、150分以内に解答する必要があります。試験の合格スコアは66％であり、試験に合格した候補者にはOracle Certified Professional、MySQL 8.0 Database Administratorの認定が授与されます。

Oracle 1Z0-908、または MySQL 8.0 データベース管理者試験は、MySQL データベースを管理する専門知識を示すために設計された認定試験です。この試験は特に、MySQL アーキテクチャ、インストール、構成、メンテナンス、セキュリティに関する候補者の知識をテストします。

 

質問 # 48
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 instance deployed on host3 must be synchronized from a donor deployed on host1 by using the command cluster.addInstance('host1:3377').
• 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. The cluster is running and there is at least one ONLINE instance.
• 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 # 49
Examine these statements and output:

Which statement is true?

• A. The user failed to define a username and the connecting username defaulted to ''@'%'.
• B. The user is logged in with --user=accounting as an option.
• C. The user is authorized as the rsmith@localhost user.
• D. The user is authorized as the accounting@localhost user.
• E. The user is authenticated as the anonymous proxy user ''@'%'.

正解：C

質問 # 50
You are using an existing server with a new configuration. MySQL Server fails to start.
Examine this snapshot of the error log:

Which action would allow the server to start?

• A. Create a new ib_logfile0 file of size 26214400.
• B. Execute mysqladmin flush-logs.
• C. First run mysqld --initialize to refresh the Size of ib_logfile.
• D. Remove ib_logfile0 and ib_logfile1 files from the file system.

正解：C

質問 # 51
You plan to take daily full backups, which include the ndbinfo and sys (internal) databases.
Which command will back up the databases in parallel?

• A. mysqldump --all-databases > full_backup-$(date +%Y%m%d).sql
• B. mysqlpump --include-databases=% > full-backup-$(date +%Y%m$d).sql
• C. mysqldump --single-transaction > full-backup-$(date +%Y%m%d).sql
• D. mysqlpump --all-databases > full-backup-$(date +%Y%m%d).sql

正解：B

解説：
Explanation
https://dev.mysql.com/doc/refman/8.0/en/mysqlpump.html By default --all-databases won't backup ndbinfo schema this can be done via
--include-database=%https://dev.mysql.com/doc/refman/8.0/en/mysqlpump.html#mysqlpump-restrictions

質問 # 52
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 all MySQL user accounts.
• D. It creates a logical backup of only the users database.

正解：B

質問 # 53
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. Change the default database and re-execute the failed statement in your transaction.
• C. Re-execute the failed statement in your transaction.
• D. Close the connection, reconnect, and start the transaction again.

正解：C

質問 # 54
Examine this command, which executes successfull
mysqlbackup --defaults-file=/backups/server-my.cnf --backup-dir=/backups/full copy-back Which statement is true about the copy-back process?

• A. It restores files from the data directory to their original MySQL server locations.
• B. It restores files from the backup directory to their original MySQL server locations.
• C. The copy-back process is used to overwrite a new backup over an existing backup.
• D. The copy-back process makes inconsistent backups.

正解：B、C

質問 # 55
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 the master has already purged transactions with cccccccc-cccc-cccc- cccc-cccccccccccc GTIDs.
• B. Replication will fail because the slave has purged more aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa transactions than the master.
• C. Replication will fail because of inconsistent numbers in cccccccc-cccc-cccc-cccc-cccccccccccc GTIDs.
• 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 work.

正解：B

質問 # 56
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 carries out a normal shutdown process, such as mysqladmin shutdown.
• 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 should be avoided. Use other methods such as mysqladmin shutdown or systemctl stop mysqld.
• D. kill -15 and kill -9 are effectively the same forced shutdown that risk committed transactions not written to disk.

正解：A

質問 # 57
A MySQL server is monitored using MySQL Enterprise Monitor's agentless installation.
Which three features are available with this installation method? (Choose three.)

• A. security-related advisor warnings
• B. disk usage and disk characteristics including disk advisors warnings
• C. MySQL Query Analysis data
• D. network-related information and network characteristics
• E. MySQL Replication monitoring
• F. CPU utilization
• G. operating system memory utilization

正解：A、B、C

質問 # 58
Examine this query and output:

Which two statements are true? (Choose two.)

• A. The query returns exactly 125 rows.
• B. 35 rows from the city table are included in the result.
• C. The countrytable is accessed as the first table, and then joined to the city table.
• D. It takes more than 8 milliseconds to sort the rows.
• E. The optimizer estimates that 51 rows in the countrytable have Continent = ‘Asia’.

正解：B、E

質問 # 59
Which two are true about differences between logical and physical upgrades of MySQL databases? (Choose two.)

• A. Physical upgrades are performed for current instances on bare metal deployments, whereas logical upgrades are used for virtual machines or containerized instances.
• B. Physical upgrades are much faster because they do not require restarting the mysqld process.
• C. Physical upgrades leave data in place, whereas logical upgrades require data to be restored from mysqldump-type backups taken before the upgrades.
• D. Post-upgrade table storage requirements after logical upgrades are usually smaller than that after physical upgrades.
• E. Post-upgrade table storage requirements after physical upgrades are usually smaller than that after logical upgrades.
• F. Logical upgrades are much faster because they do not require restarting the mysqld process.

正解：C、F

質問 # 60
All MySQL Server instances belonging to InnoDB Cluster have SSL configured and enabled.
You must configure InnoDB Cluster to use SSL for group communication.
Which two statements are true? (Choose two.)

• A. An existing InnoDB Cluster must be dissolved and created from scratch to enable SSL for group communication.
• B. SSL group communication can be enabled for an existing cluster, one instance at time, by setting group_replication_ssl_mode.
• C. Configuring SSL group communication also configures SSL distributed recovery.
• D. SSL group communication requires the use of an additional set of parameters group_replication_recovery_*.
• E. If only some InnoDB Cluster members are enabled for SSL group communication, and
  --ssl-mode=PREFERRED, communication will fall back to unencrypted connection.
• F. SSL group communication must be enabled at cluster creation time by specifying createCluster ({memberSslMode: 'REQUIRED'}).

正解：D、F

質問 # 61
Examine this statement, which executes successfully:

You want to improve the performance of this query:

Which change enables the query to succeed while accessing fewer rows?

• A. ALTER TABLE world.city ADD INDEX (Name);
• B. ALTER TABLE world.city ADD FULLTEXT INDEX (Name);
• C. ALTER TABLE world.city ADD SPATIAL INDEX (Population);
• D. ALTER TABLE world.city ADD INDEX (Population);
• E. ALTER TABLE world.city ADD SPATIAL INDEX (Name);
• F. ALTER TABLE world.city ADD FULLTEXT INDEX (Population);

正解：C

解説：
Explanation/Reference: https://dev.mysql.com/doc/refman/5.7/en/creating-spatial-indexes.html

質問 # 62
Which three are characteristics of a newly created role? (Choose three.)

• A. It is stored in the mysql.role table.
• B. It can be dropped using the DROP ROLE statement.
• C. It can be granted to user accounts.
• D. It can be renamed using the RENAME ROLE statement.
• E. It can be protected with a password.
• F. It is created as a locked account.

正解：B、C、E

質問 # 63
Examine this SQL statement:
mysql> GRANT r_read@localhost TO mark WITH ADMIN OPTION;
Which two are true? (Choose two.)

• A. ADMIN OPTION causes the role to be activated by default.
• B. ADMIN OPTION allows Mark to drop the role.
• C. Mark can grant the r_read@localhost role to another user.
• D. Mark must connect from localhost to activate the r_read@localhost role.
• E. Mark can grant the privileges assigned to the r_read@localhost role to another user.
• F. Mark can revoke the r_read@localhost role from another role.

正解：C、F

解説：
Explanation
https://dev.mysql.com/doc/refman/8.0/en/grant.html

質問 # 64
Examine this command, which executes successfully on InnoDB Cluster: dba.dropMetadataSchema() Which two statements are true? (Choose two.)

• A. The mysql_innodb_cluster_metadata schema is dropped from the instance where the connection was established.
• B. Group Replication is still operational, but InnoDB Cluster must be reimported under MySQL Shell.
• C. The mysql_innodb_cluster_metadata schema is dropped from all reachable members of the cluster.
• D. The command drops the mysql_innodb_cluster_metadata schema and re-creates it.
• E. Connections driven by MySQL Router are not affected by the command.
• F. Group Replication will be dissolved and all metadata purged.

正解：A、E

質問 # 65
Which two are valid uses for binary logs on a MySQL instance? (Choose two.)

• A. logging the duration and locks for all queries
• B. point-in-time recovery
• C. replication
• D. recording the order in which queries are issued
• E. audit of all queries

正解：B、D

質問 # 66
Your MySQL server was upgraded from an earlier major version.
The sales database contains three tables, one of which is the transactions table, which has 4 million rows.
You are running low on disk space on the datadir partition and begin to investigate.
Examine these commands and output:

Which two statements are true? (Choose two.)

• A. Executing ALTER TABLE transactions will enable you to free up disk space.
• B. Truncating the sales and leads table will free up disk space.
• C. Executing SET GLOBAL innodb_row_format=COMPRESSED and then ALTER TABLE transactions will free up disk space.
• D. Truncating the transactions table will free up the most disk space.
• E. The transactions table was created with innodb_file_per_table=OFF.

正解：C、E

質問 # 67
Examine this query and output:

Which two statements are true? (Choose two.)

• A. The query returns exactly 125 rows.
• B. 35 rows from the city table are included in the result.
• C. The optimizer estimates that 51 rows in the country table have Continent = 'Asia'.
• D. It takes more than 8 milliseconds to sort the rows.
• E. The country table is accessed as the first table, and then joined to the city table.

正解：B、C

質問 # 68
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 ACCOUNT LOCK;
• B. ALTER USER baduser@hostname DEFAULT ROLE NONE;
• C. ALTER USER baduser@hostname MAX_USER_CONNECTIONS 0;
• D. ALTER USER baduser@hostname IDENTIFIED WITH mysql_no_login;
• E. ALTER USER baduser@hostname PASSWORD DISABLED;

正解：A、D

質問 # 69
......

Oracle 1z1-908試験は、少なくとも2年間MySQL 8.0データベースを使用している経験豊富なデータベース管理者を対象に設計されています。この試験を受ける候補者は、MySQL 8.0アーキテクチャを強く理解し、MySQL 8.0データベースの設定と管理の実践的な経験を持っている必要があります。候補者はまた、SQL、Linux、およびネットワーク管理にも精通している必要があります。

 

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1z1-908試験問題、リアル1z1-908練習問題集：https://drive.google.com/open?id=1bD2asyT14vzVhIKohj9MwsgQICaz3IYb