2023年最新の1Z0-908プレミアム資料テストPDFの無料問題集お試しセット [Q67-Q84]

2023年最新の1Z0-908プレミアム資料テストPDFの無料問題集お試しセット

試験合格を向けて1Z0-908今すぐ弊社のMySQL Database Administration試験パッケージを使おう

質問 # 67
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 only the users database.
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.

正解：D

解説：
Explanation
the command mysqlpump --exclude-databases=% --users creates a logical backup of all MySQL user accounts as CREATE USER and GRANT statements2. The option --exclude-databases=% excludes all databases from the backup, while the option --users includes all user accounts1.

質問 # 68
Examine this statement and output:

You must try to reduce query execution time.
Which two queries should you focus on? (Choose two.)

A. QN = 3
B. QN = 4
C. QN = 5
D. QN = 1
E. QN = 2

正解：D、E

質問 # 69
Examine this command, which executes successfully on InnoDB Cluster: dba.dropMetadataSchema() Which two statements are true? (Choose two.)

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

正解：B、D

質問 # 70
Which two storage engines provide a view of the data consistent with the storage system at any moment?
(Choose two.)

A. MEMORY
B. ARCHIVE
C. InnoDB
D. MyISAM
E. NDB

正解：A、D

質問 # 71
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. Mark can revoke the r_read@localhost role from another role.
C. Mark can grant the privileges assigned to 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 r_read@localhost role to another user.
F. ADMIN OPTION allows Mark to drop the role.

正解：B、E

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

質問 # 72
You are using mysqlcheck for server maintenance.
Which two statements are true? (Choose two.)

A. The mysqlcheck --repair --all-databases command can repair an InnoDB corrupted table.
B. The mysqlcheck --optimize --all-databases command reclaims free space from table files.
C. The mysqlcheck --check --all-databases command takes table write locks while performing a series of checks.
D. The mysqlcheck --analyze --all-databases command performs a series of checks to spot eventual table corruptions.
Section: (none)
Explanation
E. The mysqlcheck command can be renamed mysqlrepair so that it repairs tables by default.

正解：D、E

質問 # 73
Which two MySQL Shell commands are excluded from the InnoDB Cluster creation procedure? (Choose two.)

A. dba.configureLocalInstance()
B. dba.configureInstance()
C. cluster.forceQuorumUsingPartitionOf()
D. dba.createCluster()
E. cluster.addInstance()
F. cluster.setPrimaryInstance()
G. dba.checkInstanceConfiguration()

正解：C、F

質問 # 74
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. Use the Clone Plugin to copy the data to another MySQL system.
B. Take a physical backup of the MySQL system.
C. Take your backup from a slave of the MySQL system.
D. Take a logical backup of the MySQL system.

正解：D

質問 # 75
Examine this query and output:

Which two statements are true? (Choose two.)

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

正解：A、E

質問 # 76
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. The transactions table was created with innodb_file_per_table=OFF.
B. Executing ALTER TABLE transactions will enable you to free up disk space.
C. Truncating the transactions table will free up the most disk space.
D. Executing SET GLOBAL innodb_row_format=COMPRESSED and then ALTER TABLE transactions will free up disk space.
E. Truncating the sales and leads table will free up disk space.

正解：A、D

質問 # 77
Which two MySQL Server accounts are locked by default? (Choose two.)

A. any new ROLE accounts
B. any user created with a username, but missing the host name
C. any user created without a password
D. any internal system accounts
E. any user set as DEFINER for stored programs

正解：D、E

質問 # 78
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. *.CSM files
B. ib_logfile* files
C. *.sdi files
D. ibbackup files
E. *.ibd files

正解：B、E

質問 # 79
Which three are characteristics of a newly created role? (Choose three.)

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

正解：A、C、F

解説：
Explanation
https://dev.mysql.com/doc/refman/8.0/en/roles.html
https://www.mysqltutorial.org/mysql-roles/

質問 # 80
Binary log events for the ‘mydb1’ schema must be copied to a different schema name ‘mydb2’.
Which command will do this?

A. mysqlbinlog --datebase=mydb1 --database=mydb2 | mysql
B. mysqlbinlog --read-from-remote-server --raw | sed ‘s/mydb1/mydb2/g’ | mysql
C. mysqlbinlog --rewrite-db=’mydb1->mydb2’ | mysql
D. mysqlbinlog --rewrite-db=’mydb1’ --rewrite-db=’mydb2’ | mysql

正解：B

質問 # 81
Examine these entries from the general query log:

All UPDATE statements reference existing rows.
Which describes the outcome of the sequence of statements?

A. Connection 25 experiences a lock wait timeout.
B. A deadlock occurs immediately.
C. A deadlock occurs after innodb_lock_wait_timeout seconds.
D. All statements execute without error.
E. Connection 24 experiences a lock wait timeout.

正解：C

質問 # 82
Examine these statements, which execute successfully:
CREATE ROLE r_world_rd;
GRANT SELECT ON world.* TO r_world_rd;
CREATE USER john IDENTIFIED BY 'P@ssw0rd';
GRANT r_world_rd TO john;
Examine these statements issued by user John:

What is the reason for the error?

A. The DBA needs to execute FLUSH PRIVILEGES.
B. John needs to reconnect to the database.
C. John has not activated the role.
D. The statement was blocked by MySQL Firewall.

正解：C

質問 # 83
Which three are requirements for a secure MySQL Server environment? (Choose three.)

A. Ensure appropriate file system privileges for OS users and groups.
B. Restrict the number of OS users that have access at the OS level.
C. Encrypt the file system to avoid needing exact file-system permissions.
D. Keep the entire software stack on one OS host.
E. Minimize the number of non-MySQL Server-related processes running on the server host.
F. Run MySQL server as the root user to prevent incorrect sudo settings.

正解：A、C、D

質問 # 84
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