최신 1Z0-921 무료덤프 - Oracle MySQL 2021 Implementation Essentials

문제1

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

A. Adding more MySQL servers and sharing the same dacadir on a shared storage component like NFS.

B. Deploy MySQL read-only slaves utilizing replication so that the slaves can be used for reads.

C. Increasing the memory capacity so that there is a larger pooling buffer to increase the database read performance.

D. Allocating more CPU to the database instance to improve throughput performance.

E. Increasing the storage capacity so that the database can store more data to scale.

정답: E

문제2

Which query will find rows in a table that have no counterpart in another table?

A. SELECT t1.name, t2.name2FROM employee AS t1 INNER JOIN info AS t2 ON t1.name= t2.name2;

B. SELECT left_tbl.*FROM left_tbl LEFT JOIN right_tbl ON left_tbl.id=right_tbl.idWHERE right_tbl.id IS NULL;

C. SELECT *FROM table1 INNER JOIN table2 ON table1.id=table2.id WHERE table1.id=! table2.id;

D. SELECT t1.name, t2.name2FROM employee t1 INNER JOIN info t2 WHERE t1.name=t2.name;

정답: B

문제3

How does MySQL HeatWave improve query performance?
Response:

A. By replicating data across multiple servers.

B. By offloading analytics queries to an in-memory, highly parallel processing engine.

C. By caching the entire database in memory.

D. By automatically creating indexes on frequently used columns.

정답: B

문제4

You want to change the default behavior of MySQL Enterprise Monitor (MEM). New instances detected by a MEM agent should automatically monitor discovered instances.
How can you change the Advisor Setting?

A. Go to the configuration section (MEM) and configure the default login credentials.

B. Go to the configuration section (Advisors) and create a new advisor rule for new MySQL instances based on the MySQL Advisor Wizard.

C. Go to the configuration section (Users) and create a new user according to the existing users of your new MySQL instances.

D. Go to the configuration section (Advisors) and edit the default settings of the MySQL Process Discovery according to the existing users of your new MySQL instances.

정답: D

문제5

The user 'fwuser'@'localhost% was registered with the MySQL Enterprise Firewall and was granted privileges for the SAKILA database. You executed the commands:

You want to clear the account whitelist for the * fwuser" @* localhost* user. Which statement should you run to accomplish this?

A.

B.

C.

정답: A

문제6

Which statement would you use to remove the population column from the city table?

A. DROP population FROM city;

B. DELETE population FROM city;

C. ALTER TABLE city LESS population;

D. ALTER TABLE city DELETE population;

E. ALTER TABLE city DROP population;

정답: E

문제7

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. All the MySQL instances (Master and Slave) have the same server_uuid in <datadir>/auto.cnf.

B. The mysql.inventory table on SLAVE is cloned with the same content as MASTER, which has the same server UUID.

C. The SLAVE and MASTER instances are started with the same configured value for the option - - monitor_server_uuid.

D. The mysql.instance table on SLAVE is cloned with the same content as MASTER, which has the same server UUID.

E. The MASTER and SLAVE are grouped as one instance for monitoring.

정답: D,E

문제8

Which is true about inserting an additional line in a single document stored in MySQL document store?

A. You specify the new element,s position in the JSON_ARRAY_INSERT statement.

B. Any new lines can only be inserted at the end of the document.

C. You cannot insert a single line, you have to replace the entire document with a new document.

D. The path specified must be an array position past the end of an array using the JSON_POSITION statement.

정답: A

최신 1Z0-921 무료덤프 - Oracle MySQL 2021 Implementation Essentials

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