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New 1Z1-921 Braindumps, 1Z1-921 Questions Answers

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Oracle MySQL 2021 Implementation Essentials Sample Questions (Q46-Q51):

NEW QUESTION # 46
Which statement will display the status of the partitioning plug-in?

A. SHOW STATUS PLUGINS WHERE Name= 'PARTITIONING';
B. SELECT PLUGIN_NAME, PLUGIN_VERSION, PLUGIN_STATUS FROM INFOMRATION_SCHEMA.PLUGINS WHERE PLUGIN_NAME= 'partition';
C. SHOW PLUGINS WHERE Name= 'partition';
D. USE SYS SCHEMA; SHOW PLUGINS STATUS;

Answer: B

NEW QUESTION # 47
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 t1 table is created.
B. Only the t2 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.

Answer: D

NEW QUESTION # 48
Which is true about inserting an additional line in a single document stored in MySQL document store?

A. The path specified must be an array position past the end of an array using the JSON_POSITION statement.
B. Any new lines can only be inserted at the end of the document.
C. You cannot insert a single line, you have to replace the entire document with a new document.
D. You specify the new element,s position in the JSON_ARRAY_INSERT statement.

Answer: D

NEW QUESTION # 49
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. 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.
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 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.
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. MySQL Enterprise Backup does not back up system data so that it is much faster.

Answer: B,D

NEW QUESTION # 50
Which three components can MySQL InnoDB Cluster use to Achieve database high availability?

A. MySQL Shell to create and administer InnoDB Clusters using the built-in AdminAPI.
B. MySQL Online Hot Backup to keep data consistent and always ready to be used.
C. MySQL X Plugin to enable MySQL to use the X Protocol to speed up and monitor data replication.
D. MySQL Servers with Group Replication to replicate data to all members of the cluster.
E. MySQL Router to ensure client requests are load balanced and routed to the correct servers.

Answer: A,D,E

NEW QUESTION # 51
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