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Oracle 1Z0-921 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| MySQL Security | - Security Management
|
| High Availability and Replication | - Replication and Scalability
|
| Installation and Architecture | - MySQL Infrastructure Architecture
|
| Leverage MySQL Enterprise Monitor | - Enterprise Monitor Features
|
| Database Design | - Database Objects and SQL
|
| MySQL Kubernetes | - Kubernetes Operations
|
| MySQL Database Service and HeatWave | - Cloud Database Services
|
| Oracle MySQL Enterprise Product Suite | - Enterprise Edition and Community/Standard Edition
|
| Leverage MySQL Backup | - Backup and Recovery
|
Oracle MySQL 2021 Implementation Essentials Sample Questions:
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 will be optimized and replicated.
- B. The table statistics will be stored.
- C. The table will be checked for errors and repaired.
- D. The table storage space will be reduced.
Correct Answer: A 🗳️
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 from MySQL Enterprise Backup allows logical backup with concurrency built in to get faster backup speed and restoration speed.
- B. 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.
- 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. 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.
Correct Answer: A,D 🗳️
What is true about MySQL Enterprise Transparent Data Encryption (TDE)?
- A. Encryption key is stored in a centralized key memory location
- B. Tablespace keys are managed manually behind the scenes.
- C. Enables data-at-rest encryption by encrypting the physical files of the database.
- D. Data is encrypted automatically, in real time, after it is written to storage.
Correct Answer: C 🗳️
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. The encryption feature only works with InnoDB tables. You are creating a MylSAM table, and it is causing the error.
- B. You cannot use the AUTO_INCREMENT option to create an encrypted table. This is what is causing the error.
- C. The test_encryption2 already exist. You are not using the correct option to recreate it 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.
Correct Answer: A 🗳️
Which three components can MySQL InnoDB Cluster use to Achieve database high availability?
- A. MySQL Router to ensure client requests are load balanced and routed to the correct servers.
- B. MySQL Servers with Group Replication to replicate data to all members of the cluster.
- C. MySQL X Plugin to enable MySQL to use the X Protocol to speed up and monitor data replication.
- D. MySQL Shell to create and administer InnoDB Clusters using the built-in AdminAPI.
- E. MySQL Online Hot Backup to keep data consistent and always ready to be used.
Correct Answer: A,B,D 🗳️
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