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Oracle 1Z0-921 (MySQL 2021 Implementation Essentials) Exam is a certification exam designed to test the knowledge and skills of database administrators and developers in implementing and managing MySQL databases. 1Z1-921 exam covers a wide range of topics, including database architecture, installation and configuration, backup and recovery, security, performance tuning, and troubleshooting. Passing 1Z1-921 Exam demonstrates that a candidate has a strong understanding of MySQL and can effectively manage and maintain MySQL databases in a production environment.

Oracle MySQL 2021 Implementation Essentials Sample Questions (Q43-Q48):

NEW QUESTION # 43
You want to create an encrypted table. So, you enter this command:
CREATE TABLE 'test_encryption2% (
'id' int(10) unsigned NOT NULL AUTO_INCREMENT,
'server_name' varchar(15) NOT NULL,
PRIMARY KEY ('id') ) ENGINE=MYISAM AUTO_INCREMENT=l DEFAULT CHARSET=latin1 ENCRYPTION = 'Y1; You receive the following error:
ERROR 1031 (HY000): Table storage engine for 'test_encryption2' doesn't have this option Which statement correctly explains the reason for this error?

A. You cannot use the AUTO_INCREMENT option to create an encrypted table. This is what is causing the error.
B. The test_encryption2 already exist. You are not using the correct option to recreate it and it is causing the error.
C. The encryption feature only works with InnoDB tables. You are creating a MylSAM table, and it is causing the error.
D. The term "server_name" is a reserved MySQL term. You cannot use it for the new table. This is what is causing the error.

Answer: C

NEW QUESTION # 44
Which two deployment architectures could you use for scaling-out database reads?

A. Implementing a three-node, single-primary InnoDB Cluster.
B. Altering the storage engine for all tables to memory to increase performance.
C. Changing the system setting with memory stickiness to true in order not to swap out mysq1dfrom memory.
D. Adding a memcached-tier for caching data and objects in RAM to reduce the number of times an external data source must be read.
E. Edit the configuration file and increase the value for parallel_read_workers and reboot the server

Answer: A,B

NEW QUESTION # 45
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. Data is encrypted automatically, in real time, after it is written to storage.
C. Tablespace keys are managed manually behind the scenes.
D. Encryption key is stored in a centralized key memory location

Answer: A

NEW QUESTION # 46
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. --decompress
B. --uncompress-and-apply-log
C. --apply-log-and-copy-back
D. --copy-back-and-apply-log
E. --uncompress

Answer: D,E

NEW QUESTION # 47
Which best describes database horizontal scale-out architecture deployment in MySQL in a read-heavy environment?

A. Increasing the storage capacity so that the database can store more data to scale.
B. Adding more MySQL servers and sharing the same dacadir on a shared storage component like NFS.
C. Deploy MySQL read-only slaves utilizing replication so that the slaves can be used for reads.
D. Allocating more CPU to the database instance to improve throughput performance.
E. Increasing the memory capacity so that there is a larger pooling buffer to increase the database read performance.

Answer: A

NEW QUESTION # 48
......

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