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Oracle 1Z1-921 Exam Syllabus Topics:

Oracle MySQL 2021 Implementation Essentials Sample Questions:

1. Which statement adds a column with the largest integer data type?

A) ALTER TABLE SCIENTIFIC ADD scientific_value BIGINT;
B) ALTER TABLE SCIENTIFIC ADD scientific_value DECIMAL(10,10);
C) ALTER TABLE SCIENTIFIC ADD scientific_value DECIMAL(15,10);
D) ALTER TABLE SCIENTIFIC ADD scientific_value INTEGER;

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

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

A) Edit the configuration file and increase the value for parallel_read_workers and reboot the server
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) Adding a memcached-tier for caching data and objects in RAM to reduce the number of times an external data source must be read.

4. You execute this statement:
SELECT NULL=NULL;
What is the result?

A) FALSE
B) NULL
C) TRUE
D) 1
E) 0

5. Which two statements are true about the creation or use of a Virtual Cloud Network (VCN)?

A) You can connect directly to the VCN without a define subnet.
B) You can connect directly to an instance over the internet, without a public IP address.
C) You must have an Internet gateway to connect to a public address on an Oracle Linux instance.
D) You must have an IPSec VPN to connect to an Oracle Linux instance.
E) Your instance does not have a public IP address, so you cannot connect with a public subnet.

Solutions: