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Oracle 1Z0-921 Exam Syllabus Topics:

Oracle MySQL 2021 Implementation Essentials Sample Questions:

1. Which three are characteristics of the JSON data type?

A) It validates the JSON syntax on insert or merge.
B) A set of SQL functions substantially support the SQL utilization of the data type.
C) It supports indexing directly against the JSON-defined column.
D) It is based on the TEXT data type.
E) Comparisons of JSON values are not case-sensitive.
F) Key or array references enable quick read-access to look up document elements directly.

2. You are testing a new application and want to use data masking but the database is empty. What option will generate dummy data for you to use for testing?

A) Use MySQL Enterprise High Availability to access one of the available data tables
B) Alter the table with the statement: ALTER TABLE IMPORT DATA WITH data_masking plugin;
C) Execute the sakila-data. sqi script to populate the database
D) Use mysqldump to import data from the sakila_dummy database sample data set.

3. Which two are advantages of using Document Store in MySQL?

A) MySQL provides a native data type to store JSON data as a document
B) MySQL provides a native data type to index PDF documents
C) MySQL can store XML as a schema-less database
D) MySQL is a document database allowing PDF and Word documents
E) MySQL provides a NoSQL API to access the document store

4. You establish MySQL Enterprise Server on Oracle Cloud Infrastructure connection via Secure Shell (SSH) For accessing a new MySQL Enterprise Edition on an Oracle Cloud Infrastructure (OCI) Instance you " Add SSH key " information during the OCI instance setup. You want to use Putty from your Windows Client to install MySQL.
What are the correct steps to accomplish this?

A) Use the provided private key for authentication.
B) Open Port 22 on your OCI Instance and convert the private key to ppk format. This new private key can be used for authentication.
C) Open Port 22 on your OCI Instance and configure Putty with the ssh private key.
D) Convert the private key to ppk format first and use the new private key for authentication.

5. 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 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.
B) 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.
C) mysqlbackup from MySQL Enterprise Backup allows logical backup with concurrency built in to get faster backup speed and restoration speed.
D) MySQL Enterprise Backup does not back up system data so that it is much faster.
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.

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