質問 1:You have been using mysqldump for logical backups of your MySQL databases. Your MySQL database size has been growing. Which two options can reduce the backup size and speed up the backup time?
A. Use mysqldump with - -incremental together with the - -compress option to back up incrementally based on previous full backup and compress the incremental backup files.
B. Use MySQL Enterprise Backup with the - -size=compress to compress the backup file.
C. Use MySQL Enterprise Backup with the - -compress option to compress the backup files and use - - compress-level to select the level of compression.
D. Use mysqldump with the - -changesonly option.
E. Use MySQL Enterprise Backup with the - - incremental policy to back up incrementally based on previous full backup.
正解:C,D
質問 2:Which two statements are correct about MySQL Enterprise Edition?
A. MySQL Enterprise Product Suite can be installed on an Oracle Cloud Infrastructure Virtual Cloud Network.
B. Oracle offers 24x7, global support for MySQL Enterprise Edition products installed on Oracle Cloud Infrastructure Compute Instances.
C. MySQL Enterprise Edition can be installed on an Oracle Cloud Infrastructure Compute Instance.
D. MySQL configuration can be changed in /etc/lib/myi.cnf.
E. Oracle MySQL Enterprise tools & plugins are available as optional services (installation Feature Pack I/II).
正解:D,E
質問 3:An existing MySQL Database environment has been doing backup and restore in a logical way by using the mysq1dump and mysq1 client utilities. When the backup is started using mysqldump with single-transaction mode, the existing application has long wait time. When the restore is required, it takes more than three hours to restore.
What two are benefits of using mysqlbackup from MySQL Enterprise Backup in this situation?
A. MySQL Enterprise Backup provides tape backup integration by default. It has the virtual tape option, which allows backup to tape device directly without extra third-party software integration.
B. mysqlbackup from MySQL Enterprise Backup allows logical backup with concurrency built in to get faster backup speed and restoration speed.
C. MySQL Enterprise Backup does not back up system data so that it is much faster.
D. mysqlbackup utilities dump the full database into a SQL file, which is imported into the mysql client in single-thread mode. mysqlbackup restores data from physical backups. Physical backup methods are faster than logical methods because they involve only file coping without conversion.
E. mysqlbackup can back up tables with the InnoDB engine without blocking. The backup is hot with InnoDB. Together with Incremental Backup, mysqlbackup from MySQL Enterprise Backup shortens the backup windows.
正解:B,D
質問 4:You set up a compressed full backup file from mysqlbackup by using the --compress option for MySQL Database backup. You are required to restore the database and apply the log.
Which two options should you add to the mysqlbackup to achieve the restoration of the database?
A. --copy-back-and-apply-log
B. --apply-log-and-copy-back
C. --uncompress-and-apply-log
D. --decompress
E. --uncompress
正解:A,E
質問 5:Consider this SQL statement which is using the innoDB storage engine and with global AUTOCOMMIT = 1:

What is the result after issuing the rollback command?
A. Only the t2 table is created.
B. Only the t1 table is created.
C. Both the tables, t1 and t2, are not created because there is an explicit ROLLBACK.
D. Both the tables, t1 and t2, are created.
正解:D
質問 6:Which is true about inserting an additional line in a single document stored in MySQL document store?
A. You cannot insert a single line, you have to replace the entire document with a new document.
B. Any new lines can only be inserted at the end of the document.
C. The path specified must be an array position past the end of an array using the JSON_POSITION statement.
D. You specify the new element,s position in the JSON_ARRAY_INSERT statement.
正解:D
質問 7:MySQL is installed on a Linux server with the configuration:
Which two methods can change the default options to use the authentication plug-in that implements SHA-256 hashing for user account passwords?
A. Create user by using CREATE USER 'newuser'@'localhost' IDENTIFIED WITH 'Sh@256Pa33';
B. Add --default_authentication_plugin=sha256_password on the command line when you invoke the server.
C. Add default_authentication_plugin=sha256_password under [mysqld] in the configuration file.
D. Create user by using CREATE USER 'newuser' @'localhost' SET PASSWORD AS 'Sh@256Pa33';
正解:A,B
質問 8:Which statement adds a column with the largest integer data type?
A. ALTER TABLE SCIENTIFIC ADD scientific_value INTEGER;
B. ALTER TABLE SCIENTIFIC ADD scientific_value BIGINT;
C. ALTER TABLE SCIENTIFIC ADD scientific_value DECIMAL(10,10);
D. ALTER TABLE SCIENTIFIC ADD scientific_value DECIMAL(15,10);
正解:B
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Oracle MySQL 2021 Implementation Essentials 認定 1Z0-921 試験問題:
1. The MySQL Enterprise Monitor Agent requires a user configured in each MySQL instance that is being monitored with suitable privileges to collect information about the server.
Which statement is correct?
A) Monitoring metrics need super and root privileges because they are not available for a less-privileged user.
B) The super privilege is required when starting, stopping, or restarting monitored MySQL databases.
C) MySQL Enterprise Monitor creates the required users automatically.
D) The super privilege is required when creating and populating the inventory table, as well as running statements such as show master logs or SHOW ENGINE INNODB STATUS.
2. After installing MySQL 8.0, you initialize the data directory with the --initialize command. Which two are places where you can find the root password?
A) The root_pw variable stored in the mysq1.install table.
B) The root password is not given and is blank. You must manually set the root password.
C) The root password displayed on the screen via a [warning] message.
D) As root, execute the show password command by using the SHA-256 password encryption plug-in.
E) The root password inserted in the error log set by the --log-error=[file_name] variable
3. Which of the following statements is true regarding MySQL user account privileges?
Response:
A) The USAGE privilege allows a user to connect to the MySQL server but grants no other privileges.
B) A user with the SUPER privilege can only read data from the database.
C) The RELOAD privilege allows a user to delete data from a table.
D) The GRANT option allows a user to revoke privileges from other users.
4. You need to load the MySQL Enterprise Audit plug-in at database startup and prevent the audit plug-in from being removed at run time.
Which two options should you include in the MySQL configuration file?
A) audit-log=FORCE_PLUS_PERMANENT
B) LOAD PLUGIN=AUDIT_LOG
C) plugin-load=audit_log.so
D) plugin-audit=ON, ALWAYS
E) audit_log_permanent=ON
5. You are using the innoDB engine and the innodb_f ile_per_table option is set.
You delete a significant number of rows of a large table named inventory and issue the command optimize table inventory.
What will happen to the inventory table?
A) The table statistics will be stored.
B) The table will be optimized and replicated.
C) The table will be checked for errors and repaired.
D) The table storage space will be reduced.
質問と回答:
質問 # 1 正解: D | 質問 # 2 正解: A、D | 質問 # 3 正解: A | 質問 # 4 正解: A、E | 質問 # 5 正解: B |