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Oracle 1Z0-921 Exam Syllabus Topics:

Oracle MySQL 2021 Implementation Essentials Sample Questions:

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

2. When using an Oracle Cloud Infrastructure Compute Instance with MySQL Enterprise Edition installed, you have two choices for backup destinations. What are these two choices?

A) Flash-archive recovery area
B) Cloud tape library
C) Both Cloud storage and local storage
D) Cloud storage only

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

A) Increasing the memory capacity so that there is a larger pooling buffer to increase the database read performance.
B) Increasing the storage capacity so that the database can store more data to scale.
C) Deploy MySQL read-only slaves utilizing replication so that the slaves can be used for reads.
D) Adding more MySQL servers and sharing the same dacadir on a shared storage component like NFS.
E) Allocating more CPU to the database instance to improve throughput performance.

4. Which statement is used to create a new MySQL database?
Response:

A) CREATE DATABASE
B) NEW DATABASE
C) CREATE TABLE
D) CREATE SCHEMA

5. Which three statements describe MySQL Enterprise Backup?

A) MySQL Enterprise Backup can be used to send backups to Oracle Cloud Infrastructure Storage Service.
B) MySQL Enterprise Backup offers backup based on Oracle RMAN with optimized row locking.
C) MySQL Enterprise Backup can be used to import/export data from on-premises MySQL installations.
D) MySQL Enterprise Backup provides the point-in-time recovery functionality.
E) MySQL Enterprise Backup is an optimized backup based on mysqldump with optimized row locking.

Solutions: