- Exam Code: C2090-312
- Exam Name: IBM DB2 11 DBA for z/OS
- Updated: Sep 03, 2026
- Q & A: 67 Questions and Answers
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| Certification Vendor: | IBM |
|---|---|
| Exam Name: | IBM DB2 11 DBA for z/OS |
| Exam Number: | C2090-312 |
| Available Languages: | English |
| Exam Format: | Multiple Response, Multiple Choice |
| Exam Price: | USD 200 |
| Related Certifications: | IBM Certified Database Administrator - DB2 11 DBA for z/OS |
| Real Exam Qty: | 60 |
| Exam Duration: | 90 minutes |
| Sample Questions: | ![]() |
| Exam Way: | Delivered through authorized IBM testing partners (Pearson VUE) at test centers or online proctored where available during the exam's active lifecycle. |
| Pre Condition: | 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. |
| Official Syllabus URL: | https://www.ibm.com/training/certification/ |
| Section | Objectives |
|---|---|
| Installation, Migration, and System Administration | - Configure DB2 subsystem parameters - Plan and support DB2 11 installation and migration - Manage data sharing and operational environments |
| Backup, Recovery, and Utilities | - Manage logging and disaster recovery - Plan and perform backup and recovery - Use DB2 utilities for maintenance |
| Database Design and Object Management | - Implement storage and object design strategies - Manage table spaces, indexes, and partitions - Create and manage database objects |
| Performance Monitoring and Tuning | - Analyze access paths and SQL performance - Monitor database performance - Optimize system resources and workloads |
| Security and Authorization | - Implement authentication and authorization - Manage users, roles, and privileges - Audit and secure database access |
IBM DB2 11 DBA for z/OS is an official certification exam from IBM, identified by the exam code C2090-312. Pass it and you hold the IBM Certified Database Administrator certification, which sits at the Professional level. It also feeds into related credentials, including IBM Certified Database Administrator - DB2 11 DBA for z/OS. In practical terms, this certification tells employers your skills have been measured against the vendor's own standard, which is why certified candidates tend to stand out in hiring and promotion decisions.
Expect 60 questions within 90 minutes on the IBM DB2 11 DBA for z/OS exam. Numbers aside, the real challenge is rhythm: lingering too long on one item quietly steals time from three others. Build the habit of answering, flagging, and moving on, then rehearse the full experience under a countdown with the Actual4Dumps test engine until finishing comfortably early becomes your norm.
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.
Because vendors update their policies without much fanfare, verify the latest entry requirements before you book using the official exam page.
Yes, and we encourage it. Download the free PDF demo of the IBM DB2 11 DBA for z/OS questions from Actual4Dumps and evaluate the quality on your own terms. After you buy, every update for the next 365 days is free, and when that window closes you can extend your update service at half price.
A 100% money-back guarantee applies, governed by clear conditions. If you sit the IBM DB2 11 DBA for z/OS exam within 60 days of purchase and fail, you can claim a full refund, as long as the exam corresponds to your product. Attempts made within 3 days of purchase are ineligible, as are products you downloaded but never used, free materials, and expired orders; the name on the exam record must match the payer's name. File your claim with a scanned enrollment slip and the official Score Report PDF within 2 days of the exam, and it is settled within 7 days. Rather have a replacement than a refund? You may exchange for two other exam products of equal value, free, and your original product keeps its update service.
Delivery is essentially instantaneous: files unlock for download at payment and arrive in your email within one minute. Some vendors make you wait a day; if 2 hours pass here without delivery, check spam and contact customer service. Install on as many computers as you like, with no restrictions.
The IBM DB2 11 DBA for z/OS blueprint spans 5 domains. The ones carrying the most weight include Backup, Recovery, and Utilities, Security and Authorization, and Installation, Migration, and System Administration. The complete domain-by-domain breakdown is in the exam topics section above; treat it as your master checklist and let the weights tell you where your study hours earn the most.
Question 1
Index versions are created when certain schema changes are committed. Which schema change results in a new index version being created?
A. Issue the ALTER INDEX REGENERATE statement.
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. 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.
Question 2
The degree of parallelism can vary for the REBUILD INDEX utility.
What action should be taken to limit the use of real memory using the REBUILD INDEX utility?
A. Increase the value of the PARALLEL option.
B. Increase the value in the CURRENT DEGREE special register.
C. Decrease the value of the PARALLEL option.
D. Decrease the value in the CURRENT DEGREE special register.
Question 3
You analyze an accounting report. You see a high "NOT ACCOUNTED" time. Which two events can contribute to this high value?
A. Log write wait time.
B. I/O read wait time.
C. Real storage paging wait time.
D. Execution unit switch wait time.
E. CPU wait time.
Question 4
Consider a logical data model that includes an Employees entity and a Projects entity. In this model, employees work on many projects and projects are worked on by many employees.
The Employees and Projects entity is considered what kind of relationship?
A. A many-to-one relationship.
B. A many-to-many relationship.
C. A one-to-many relationship.
D. A one-to-one relationship.
Question 5
What is the minimum buffer pool page size for a compressed index?
A. 32K
B. 16K
C. 4K
D. 8K
Solutions:
| Question 1 Answer: C | Question 2 Answer: A | Question 3 Answer: A,D | Question 4 Answer: B | Question 5 Answer: C |
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