The C2090-312 exam has ended more study plans than hard questions ever did — because stale material teaches confidently wrong things. ExamCost monitors the exam daily and keeps its IBM DB2 11 DBA for z/OS questions on the latest version, so your 2026 prep stays accurate.
IBM C2090-312 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Performance Monitoring and Tuning | - Optimize system resources and workloads - Monitor database performance - Analyze access paths and SQL performance |
| Installation, Migration, and System Administration | - Manage data sharing and operational environments - Plan and support DB2 11 installation and migration - Configure DB2 subsystem parameters |
| Database Design and Object Management | - Create and manage database objects - Implement storage and object design strategies - Manage table spaces, indexes, and partitions |
| Security and Authorization | - Manage users, roles, and privileges - Audit and secure database access - Implement authentication and authorization |
| Backup, Recovery, and Utilities | - Plan and perform backup and recovery - Manage logging and disaster recovery - Use DB2 utilities for maintenance |
C2090-312 Exam — Questions Candidates Actually Ask
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The IBM DB2 11 DBA for z/OS is the official IBM exam behind the IBM Certified Database Administrator certification at the Professional level. It's how the vendor verifies that your skills meet its standard — and how employers know they do. Related credentials include IBM Certified Database Administrator - DB2 11 DBA for z/OS, useful context if you're mapping a longer certification path.
60 questions, 90 minutes on the clock. That ratio is the real exam-within-the-exam: budget your time per question, learn to flag and move on, and rehearse in the ExamCost engine under real timing until finishing comfortably becomes your default.
The IBM DB2 11 DBA for z/OS blueprint divides into 5 domains, with Backup, Recovery, and Utilities, Performance Monitoring and Tuning, Security and Authorization among the headline areas. Let the weightings steer your hours — they tell you where the questions concentrate. The full outline above shows every subtopic.
Recommended candidates have significant experience administering IBM DB2 for z/OS and knowledge of SQL, database administration, backup/recovery, security, and performance tuning. A DB2 Fundamentals certification or equivalent knowledge is recommended. Vendor policies evolve, so before booking, confirm the latest eligibility details on the official exam page (official C2090-312 exam information).
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IBM DB2 11 DBA for z/OS Sample Questions:
Which is NOT a valid value for the KEYWORDS column in the DSN_PROFILES_ATTRIBUTES table?
- A. MONITOR IDLE THREADS
- B. MONITOR ACTIVE THREADS
- C. MONITOR CONNECTIONS
- D. MONITOR THREAD
Correct Answer: A 🗳️
Which table characteristic is a good attribute for the exploitation of hash access?
- A. At least 20 rows fit on a data page.
- B. DB2 uses sequential lookups to access data in the table.
- C. DB2 uses range scans to access rows in the table.
- D. The size of individual rows in the table vary greatly.
Correct Answer: B 🗳️
Which technique can be utilized for the reporting of real-time statistics?
- A. Query the SYSIBM.SYSTABLES_PROFILES system catalog table.
- B. Call stored procedure SYSPROC.DSNACCOX.
- C. Query the SYSI BM.SYSTABSTATS system catalog table.
- D. Call stored procedure SYSPROC.ADMINJNFOJHOST.
Correct Answer: A 🗳️
A hotel prices its rooms differently at different times of the year. For example, Room 101 rents for $100 per night January through March, $150 per night April through September, and $80 per night October through December.
Which type of table could be used to implement the time-based rate changes?
- A. A system-period temporal table
- B. A range-based temporal table
- C. A rate-period temporal table
- D. An application-period temporal table
Correct Answer: D 🗳️
Index versions are created when certain schema changes are committed. Which schema change results in a new index version being created?
- A. When you extend the length of a varying-length character (VARCHAR data type) or varying-length graphic (VARGRAPHIC data type) column that is contained in one or more indexes that are defined with the NOT PADDED option.
- B. Add a new column to both a table and an index in the same commit operation when the table is in a partition-by-growth table space and the index is built with DEFINE YES.
- C. Use the ALTER INDEX statement to add a column to an index that was built with DEFINE NO.
- D. Issue the ALTER INDEX REGENERATE statement.
Correct Answer: C 🗳️
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