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Oracle 1Z0-921 Exam Syllabus Topics:

Oracle MySQL 2021 Implementation Essentials Sample Questions:

1. Which two statements are true about MySQL Enterprise Authentication?

A) MySQL Enterprise Authentication determines what operation the user can perform.
B) MySQL Enterprise Authentication supports Linux Pluggable Authentication Modules (PAM).
C) MySQL Enterprise Authentication makes it more difficult to set up security because you have different sets of security policies.
D) MySQL Enterprise Authentication supports Windows Active Directory.
E) MySQL Enterprise Edition automatically connects to Oracle Password Vault to verify user passwords..

2. 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) Allocating more CPU to the database instance to improve throughput performance.
D) Increasing the memory capacity so that there is a larger pooling buffer to increase the database read performance.
E) Increasing the storage capacity so that the database can store more data to scale.

3. How does MySQL HeatWave improve query performance?
Response:

A) By offloading analytics queries to an in-memory, highly parallel processing engine.
B) By automatically creating indexes on frequently used columns.
C) By replicating data across multiple servers.
D) By caching the entire database in memory.

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

A) SELECT left_tbl.*FROM left_tbl LEFT JOIN right_tbl ON left_tbl.id=right_tbl.idWHERE right_tbl.id IS NULL;
B) SELECT t1.name, t2.name2FROM employee t1 INNER JOIN info t2 WHERE t1.name=t2.name;
C) SELECT *FROM table1 INNER JOIN table2 ON table1.id=table2.id WHERE table1.id=! table2.id;
D) SELECT t1.name, t2.name2FROM employee AS t1 INNER JOIN info AS t2 ON t1.name= t2.name2;

5. Which two statements about the download of MySQL Enterprise Backup are correct?

A) MySQL Enterprise Backup can be downloaded from My Oracle Support (MOS).
B) MySQL Enterprise Backup comes with MySQL Utilities Package, which is available for download publicly on http://www.mysql.com.
C) MySQL Enterprise Backup is a separate package from MySQL Enterprise Edition. It can be downloaded from https://edelivery.oracle.com.
D) MySQL Enterprise Backup comes with MySQL Connector and is freely available for download.
E) MySQL Enterprise Backup comes with all MySQL editions including community edition.

Solutions: