Oracle 1Z1-921

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Oracle MySQL 2021 Implementation Essentials Sample Questions:

1. Which component of MySQL Enterprise Monitor provides trend analysis and capacity planning for MySQL databases?
Response:

A) MySQL Dashboard
B) MySQL Query Analyzer
C) Query Analyzer
D) MySQL Advisors

2. Which activity will take place if a table is created with both the compression and encryption options?

A) The compression is performed, the ''data_at_rest_flag" is turned on and the tablespace data is encrypted.
B) The system generates an error because the COMPRESSION and ENCRYPTION options cannot be used together.
C) The tablespace data is encrypted first and then compression is performed.
D) The compression is performed before tablespace data is encrypted.

3. Which three components can MySQL InnoDB Cluster use to Achieve database high availability?

A) MySQL Online Hot Backup to keep data consistent and always ready to be used.
B) MySQL X Plugin to enable MySQL to use the X Protocol to speed up and monitor data replication.
C) MySQL Router to ensure client requests are load balanced and routed to the correct servers.
D) MySQL Servers with Group Replication to replicate data to all members of the cluster.
E) MySQL Shell to create and administer InnoDB Clusters using the built-in AdminAPI.

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

A) SELECT *FROM table1 INNER JOIN table2 ON table1.id=table2.id WHERE table1.id=! table2.id;
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 t1.name, t2.name2FROM employee AS t1 INNER JOIN info AS t2 ON t1.name= t2.name2;
D) SELECT t1.name, t2.name2FROM employee t1 INNER JOIN info t2 WHERE t1.name=t2.name;

5. Which three options are valid reasons for using a primary key in a table?

A) preventing duplicate keys
B) automatic storage of data in a sorted order
C) exporting data faster with mysqldump
D) increasing performance when using select statements
E) to make it easier to change the PRIMARY KEY value
F) maintaining a history of row insertions or updates

Solutions: