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Oracle MySQL 2021 Implementation Essentials Sample Questions (Q49-Q54):

NEW QUESTION # 49
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 mysqldump with the - -changesonly option.
C. Use MySQL Enterprise Backup with the - -size=compress to compress the backup file.
D. Use MySQL Enterprise Backup with the - - incremental policy to back up incrementally based on previous full backup.
E. Use MySQL Enterprise Backup with the - -compress option to compress the backup files and use - - compress-level to select the level of compression.

Answer: B,E

NEW QUESTION # 50
What is true about MySQL Enterprise Transparent Data Encryption (TDE)?

A. Enables data-at-rest encryption by encrypting the physical files of the database.
B. Encryption key is stored in a centralized key memory location
C. Data is encrypted automatically, in real time, after it is written to storage.
D. Tablespace keys are managed manually behind the scenes.

Answer: A

NEW QUESTION # 51
What SQL keyword must be specified when creating a foreign key constraint?

A. unique PRIMARY key values for both child and parent tables
B. a TRIGGER on the child table for cascading delete statements
C. a REFERENCES in the child table to the parent table
D. the SET_FOREGIN variable in the my .cnf file
E. an index on the foreign key

Answer: B

NEW QUESTION # 52
Which three are requirements for MySQL Group Replication (GR)?

A. Data to be replicated must be stored in the InnoDB transactional storage engine.
B. The minimum number of required nodes for achieving a consensus is two.
C. Primary keys are required on every replicated table.
D. The binary log format must be set to mixed.
E. The use of global transaction identifiers is required.
F. GR only works with MySQL versions 8.0.12 or higher.

Answer: A,C,D

NEW QUESTION # 53
You execute this statement:
SELECT NULL=NULL;
What is the result?

A. TRUE
B. 0
C. NULL
D. FALSE
E. 1

Answer: C

NEW QUESTION # 54
......

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