FC0-U71 Data and Database Fundamentals Practice Question
Which DBMS is an example of a proprietary relational database system?
⚠ Common exam trap
FC0-U71 often tests the distinction between open-source and proprietary software; the trap is that MySQL is owned by Oracle, leading some to think it is proprietary, but it remains open-source under GPL.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Oracle Database
Oracle Database is a proprietary relational database management system owned by Oracle Corporation. It is commercial, closed-source, and requires a license for use, which distinguishes it from open-source alternatives. Therefore, it is the correct example of a proprietary relational DBMS.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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MySQL
Why it's wrong here
MySQL Community Edition is open source under the GPL, so it is not proprietary. It is tempting because Oracle also sells commercial MySQL editions, but the DBMS itself is not classed as a proprietary relational system in this context.
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PostgreSQL
Why it's wrong here
PostgreSQL is open source under the PostgreSQL Licence, so it is not proprietary. It is tempting because it is a full-featured relational DBMS with SQL support, and would be the right answer if the question asked for an open-source relational database instead.
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SQLite
Why it's wrong here
SQLite is public domain open-source software, so it is not proprietary. It is tempting because it is a relational DBMS, but it is embedded and file-based, and would be correct if the question asked for a lightweight embedded relational database.
- ✓
Oracle Database
Why this is correct
Oracle Database is a proprietary relational DBMS, satisfying the stem's requirement for a commercial, closed-source system. Unlike open-source alternatives such as MySQL or PostgreSQL, its source code is owned by Oracle Corporation and licensed commercially, which is precisely the defining characteristic of a proprietary relational database system.
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Last reviewed September 2026 · checked against the official CompTIA exam blueprint
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