Every candidate studies differently, so ValidDumps ships the 1Z0-909 practice questions in three formats: a printable PDF, a Desktop Test Engine for Windows, and an Online Test Engine that runs in any browser. However you prefer to prepare for Oracle MySQL 8.0 Database Developer, there is a version that fits.
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Transactions and Concurrency | 15% | - Understand isolation levels and locking mechanisms - Resolve consistency and concurrency issues - Control transactions in SQL and applications |
| Topic 2: Connectors and APIs | 15% | - Choose appropriate connectors for applications - Configure and manage connectors - Retrieve data using connectors - Handle special values and secure connections |
| Topic 3: JSON and Document Store | 15% | - Create and store JSON documents - Query and process JSON data - Use XDevAPI and MySQL Shell for document store |
| Topic 4: MySQL Stored Programs | 15% | - Implement triggers and events - Create stored procedures and functions - Use programming constructs in routines |
| Topic 5: Query Optimization | 15% | - Design and use indexes effectively - Analyze queries using EXPLAIN - Rewrite queries for better performance |
| Topic 6: MySQL Schema Objects and Data Types | 20% | - Define constraints and indexes - Work with numeric, string, temporal and spatial data types - Design, create and alter tables and views |
| Topic 7: Data-driven Applications | 15% | - Use prepared statements - Set and use SQL Modes - Aggregate and summarize data - Handle errors, warnings and result sets |
The 1Z0-909 exam is the official exam behind the Oracle Certified Professional, MySQL 8.0 Database Developer credential from Oracle. It sits at the Professional level of the Oracle certification track. The ValidDumps practice questions on this page map to the same objectives, so you can measure your readiness before you book a seat.
The 1Z0-909 exam contains 65 questions and gives you 90 minutes to complete them. That pace leaves little room for getting stuck, so train yourself to flag a hard question, move on, and circle back later. Run at least one full timed session in the ValidDumps test engine a week before your exam date to check whether your pacing holds under pressure.
You need 62% to pass the 1Z0-909 exam, and the official registration fee is USD $245 (varies by region). A retake means paying that fee again in full, which makes thorough preparation the cheaper option by far. Before scheduling, take a timed ValidDumps practice test; if you are not scoring comfortably above the passing line, give yourself more study time instead of booking on hope.
No mandatory prerequisites; recommended 6-12 months hands-on experience with MySQL 8.0
Requirements can change, so confirm the latest details on the official Oracle exam page before you register.
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The 1Z0-909 syllabus is divided into 7 domains, including Connectors and APIs (15%), JSON and Document Store (15%), and Query Optimization (15%). The complete breakdown, with every domain and its subtopics, is listed in the Exam Topics section above — review it line by line and flag the areas where you feel weakest.
Examine these commands and output:
Which is true?
Correct Answer: A 🗳️
Examine these commands and output:

Which is true about the execution of the insert statement?
Correct Answer: C 🗳️
Examine this table definition:
The table must always remain a valid document store collection. What restriction does this impose on any added column?
Correct Answer: B 🗳️
Examine these statement which execute successfully:
Now, examine the statements executed in the mysqi command-line client:
What is true?




Correct Answer: A 🗳️
Examine this statement and output:
You execute this statement:
SELECT JSON_SEARCH(product,'one','IT') FROM fshop ;
What is the output?
Correct Answer: B 🗳️
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