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Oracle 1Z0-921 考試大綱主題:

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

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

2. Which two deployment architectures could you use for scaling-out database reads?

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

3. You have a MySQL Server instance (running with Port# 3306) monitored by the Service Manager in MySQL Enterprise Monitor. You cloned the MySQL Database instance and configured it to be a replicated MySQL instance as Slave using Port# 3316 on the same machine as the Master Server. The replication configuration is working correctly. The Master and Slave Servers are running.
You are trying to add the newly created MySQL Slave instance to the Monitor. The Service Manager in MySQL Enterprise Monitor notifies you that the new instance is successfully added; however, it is not added correctly at the newly added configuration points to the old Master monitored items. The Monitor shows only one monitored MySQL instance for Master and Slave.
Which two are possible reasons for this problem?

A) The MASTER and SLAVE are grouped as one instance for monitoring.
B) The SLAVE and MASTER instances are started with the same configured value for the option - - monitor_server_uuid.
C) All the MySQL instances (Master and Slave) have the same server_uuid in <datadir>/auto.cnf.
D) The mysql.instance table on SLAVE is cloned with the same content as MASTER, which has the same server UUID.
E) The mysql.inventory table on SLAVE is cloned with the same content as MASTER, which has the same server UUID.

4. You establish MySQL Enterprise Server on Oracle Cloud Infrastructure connection via Secure Shell (SSH).
When accessing a new MySQL Enterprise Edition Oracle Cloud Infrastructure (OCI) instance, you want to use MySQL Enterprise Workbench for SQL and remote management.
What are two ways to successfully configure Workbench based on the MySQL access credentials?

A) Configure TCP/IP over SSH and based on the created private key, opc-User, and MySQL access credentials, you can access the MySQL OCI instance.
B) Open the MySQL OCI instance access port 3306. For the MySQL connection, you use this port, and, in addition, you configure the remote management based on SSH based on the provided key.
C) Convert the private key to ppk format first. Based on TCP/IP over SSH and based on the created private key, opc-user, and MySQL access credentials, you can access the MySQL CS instance.
D) Configure the MySQL Router first and based on those settings, you access your MySQL CS instance.

5. You have a backup image file that is backed up using MySQL Enterprise Backup with the -compress option:
/home/mysq1/backup/full/mybackup/myimage. Img

You are required to perform a database restore to a new machine to provision the database. Which command can provision the new database in the datadir as /home/mysql/data/MEB?

A)

B)

C)

D)

E)

問題與答案：