Oracle 1Z0-921 : MySQL 2021 Implementation Essentials
- Exam Code: 1Z0-921
- Exam Name: MySQL 2021 Implementation Essentials
- Updated: Sep 26, 2026
- Q & A: 78 Questions and Answers
About Oracle 1Z0-921 Exam
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Oracle 1Z0-921 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Oracle MySQL Enterprise Product Suite | - Enterprise Edition and Community/Standard Edition
|
| Topic 2: MySQL Kubernetes | - Kubernetes Operations
|
| Topic 3: High Availability and Replication | - Replication and Scalability
|
| Topic 4: Leverage MySQL Enterprise Monitor | - Enterprise Monitor Features
|
| Topic 5: MySQL Security | - Security Management
|
| Topic 6: MySQL Database Service and HeatWave | - Cloud Database Services
|
| Topic 7: Database Design | - Database Objects and SQL
|
| Topic 8: Leverage MySQL Backup | - Backup and Recovery
|
| Topic 9: Installation and Architecture | - MySQL Infrastructure Architecture
|
Oracle MySQL 2021 Implementation Essentials Sample Questions:
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. The path specified must be an array position past the end of an array using the JSON_POSITION statement.
- C. You cannot insert a single line, you have to replace the entire document with a new document.
- D. Any new lines can only be inserted at the end of the document.
Correct Answer: A 🗳️
Which three are levels in which MySQL Enterprise Monitor provides access control?
- A. Specific data access: the rights to view specific types of potentially sensitive data
- B. MySQL Enterprise Operations: the right to deploy the necessary MySQL Enterprise Agent
- C. MySQL Enterprise Operations: the right to start/stop/restart/update MySQL Enterprise Monitor Services
- D. Asset visibility: the rights to access data collected from hosts or MySQL instances
- E. Application administration: the rights to view or change the MySQL Enterprise Monitor configuration
Correct Answer: A,D,E 🗳️
How does MySQL HeatWave improve query performance?
Response:
- A. By automatically creating indexes on frequently used columns.
- B. By replicating data across multiple servers.
- C. By caching the entire database in memory.
- D. By offloading analytics queries to an in-memory, highly parallel processing engine.
Correct Answer: D 🗳️
Which three are recommended configurations for installing and running MySQL InnoDB Cluster?
- A. Use Network-attached storage (NAS) for the data files.
- B. smaller VM,s work best - with a maximum of eight vCPU,s and 16GB of RAM
- C. isolated machine resources
- D. Networks must be in separate regions.
- E. Groups must be in even numbers; 2, 4, 6, 8.
- F. use SSD,s for data and replication logs
- G. The number of machines per group must be 3, 5, 7 or 9.
Correct Answer: A,E,G 🗳️
You execute this statement:
SELECT NULL=NULL;
What is the result?
- A. 1
- B. NULL
- C. FALSE
- D. 0
- E. TRUE
Correct Answer: B 🗳️
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