Oracle 1Z0-921 Exam : MySQL 2021 Implementation Essentials
- Exam Code: 1Z0-921
- Exam Name: MySQL 2021 Implementation Essentials
- Updated: Oct 06, 2026
- Q & A: 78 Questions and Answers
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Oracle 1Z0-921 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Backup, Recovery, and Replication | - Replication concepts and configuration - Backup strategies |
| Topic 2: Database Design and Development | - Data types and normalization - Schema design principles |
| Topic 3: Monitoring and Troubleshooting | - Performance monitoring - Basic troubleshooting techniques |
| Topic 4: Security and User Management | - Authentication plugins (PAM, AD integration) - User accounts and privileges |
| Topic 5: Data Management and SQL Operations | - SQL queries and DML operations - Indexing and optimization basics |
| Topic 6: MySQL Architecture and Installation | - Installation and configuration - MySQL server architecture |
Oracle MySQL 2021 Implementation Essentials Sample Questions:
You get a maintenance-notification about your MySQL Enterprise Edition in Oracle Cloud Infrastructure (OCI) Compute instance. What is re the implication?
- A. You need to agree to the maintenance windows. If not, you are not affected by the outage.
- B. Depending on the planned outage, you may not be affected by it. You need to read the maintenance details in the support notice.
- C. There are no maintenance operations planned. You need to do them manually.
- D. You can expect an outage of your MySQL OCI instance during the planned time..
Correct Answer: D 🗳️
How would you restrict a user Joe from accessing all MySQL database objects?
- A. CREATE USER ,joe'@,0.0.0.0, SET Password=PASSWORD(,% ! %,)
- B. CREATE USER , joe,@1' %' DENY ALL PRIVILEGES
- C. Insert Joe,s name into the mysql.user_restriction cable, and issue the FLUSH PRIVILEGES command.
- D. UPDATE mysql.user SET Password=PASSWORD(,Invalid,) WHERE User=,joe';
- E. REVOKE ALL PRIVILEGES, GRANT OPTION FROM ,joe,@,%,;
Correct Answer: C 🗳️
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;
Correct Answer: A 🗳️
Your newly-created Oracle Cloud Infrastructure instance is not available for login in. Which is a valid reason for this issue?
- A. You forgot to enable port 3306.
- B. The opc user can be used to access MySQL only with the created SSH-Key.
- C. You forgot to create the correct SSL/TLC certificate during the setup process.
- D. Only root is allowed to access from non-localhost.
- E. The OCI instance is still in the "creation" process.
Correct Answer: A 🗳️
Which Oracle product is certified to work with MySQL Enterprise Edition?
- A. Oracle Enterprise Backup
- B. Oracle Application Express
- C. Oracle Data Pump
- D. Oracle Enterprise Manager
Correct Answer: D 🗳️
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