I B M C E R T I F I C A T I O N
C9007900 IBM Certified z/OS v3.x Administrator – Professional Practice Exam
Exam Number: 4335 | Last updated April 17, 2026 | 412+ questions across 5 vendor-aligned objectives
Mainframe system programmers who keep z/OS v3.x estates running for banks, insurers, and public-sector workloads are the audience for the C9007900 credential. This professional-level exam validates your ability to install, configure, and operate z/OS v3.x, with emphasis on the new capabilities that distinguish v3 from v2.x. Candidates should be fluent with JES2, RACF, SMP/E, and the z/OSMF administrative surface.
Seizing 26% of the exam, Installation and Configuration covers z/OSMF workflows, SMP/E maintenance, parmlib setup, new-release activation, and the migration considerations specific to v3.x. At 22%, Security and RACF covers dataset profiles, general-resource classes, multilevel security, and integration with cryptographic hardware. A further 20% targets Storage and Catalog, covering SMS, DFSMSdss, DFSMShsm, and catalog management.
Weaving in the final domains, Workload and Performance accounts for 18% and spans WLM goal mode, SMF data, and performance tuning. Networking and Communication represents 14% and spans TCP/IP, VTAM, and Communications Server. z/OS questions frequently blend multiple subsystems — a batch failure often has its real cause in WLM, SMS, or RACF rather than in the failing job itself.
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Question #1 - Installation and Configuration
A sysprog at Millbank Trust must roll up pending maintenance for z/OS v3.x on a test LPAR.
Which z/OS tool fits?
A) Copy libraries manually between systems
B) Use SMP/E to apply the maintenance PTFs, RECEIVE/APPLY/ACCEPT them, and verify the results before promoting to production
C) Skip maintenance and hope nothing breaks
D) Apply PTFs directly in production without test
Show solution
Correct answers: B – Explanation:
SMP/E with the RECEIVE/APPLY/ACCEPT flow is z/OS’s maintenance reference. Manual copy, skipping, and direct-to-prod all fail maintenance discipline. Source: Check Source
Question #2 - Installation and Configuration
A migration from z/OS v2.5 to v3.x at Coldstream Insurance requires a controlled cutover.
Which z/OS v3.x approach fits?
A) Skip parmlib updates and hope defaults work
B) Migrate everything at once with no plan
C) Stay on v2.5 forever
D) Use z/OSMF workflows for migration, apply the v3.x-specific parmlib and migration actions, and validate with a staged rollout
Show solution
Correct answers: D – Explanation:
z/OSMF workflows plus staged rollout is z/OS’s migration reference. Blind migration, never-migrating, and skipping parmlib all fail migration practice. Source: Check Source
Question #3 - Installation and Configuration
A new-release activation at Peningdale Bank must bring a v3.x feature live at the next IPL.
Which z/OS configuration surface fits?
A) Bring up the feature manually from the console each day
B) Edit running memory without parmlib changes
C) Update the relevant parmlib members and activate the change at IPL (or dynamically if supported), following z/OSMF activation workflows
D) Skip activation and rely on rumor that it is on
Show solution
Correct answers: C – Explanation:
Parmlib updates plus IPL activation (or dynamic activation where supported) is z/OS’s reference. Memory edits, console-only activation, and rumor all fail activation practice. Source: Check Source
Question #4 - Security and RACF
A dataset security requirement at Haverton Ltd says only the payroll group can read a sensitive dataset.
Which RACF construct fits?
A) Define a dataset profile with UACC(NONE) and PERMIT the payroll group with READ access, ensuring SETROPTS GENERIC is active
B) Set UACC(READ) so everyone can read and hope payroll alone cares
C) Remove all RACF protection on the dataset
D) Use dataset names to hide the dataset instead of RACF
Show solution
Correct answers: A – Explanation:
UACC(NONE) plus PERMITs for the authorized group is RACF’s dataset-protection reference. UACC(READ), no-RACF, and name-hiding all fail security. Source: Check Source
Question #5 - Security and RACF
A general-resource class at Cranmere Bank must be activated to secure CICS transactions.
Which RACF configuration fits?
A) Disable RACF integration with CICS
B) Leave the class inactive and trust CICS to self-police
C) Grant everyone READ to all transactions
D) SETROPTS CLASSACT for the relevant class (e.g., TCICSTRN), define profiles for the transactions, and PERMIT the appropriate user groups
Show solution
Correct answers: D – Explanation:
CLASSACT plus profiles plus PERMITs is RACF’s general-resource reference. Inactive classes, blanket READ, and disabled integration all fail CICS security. Source: Check Source
Question #6 - Storage and Catalog
A dataset-lifecycle policy at Edgeworth Insurance must automatically migrate cold datasets to lower-cost storage.
Which z/OS facility fits?
A) Ask operators to move datasets by hand
B) Use DFSMShsm with management classes that migrate based on last-referenced age, tiering from primary to ML1 and ML2
C) Delete cold datasets to save money
D) Leave all datasets on expensive storage forever
Show solution
Correct answers: B – Explanation:
DFSMShsm with management classes is z/OS’s storage-hierarchy reference. Manual moves, deletion, and static placement all fail storage lifecycle. Source: Check Source
Question #7 - Storage and Catalog
A catalog consolidation project at Bellhurst Financial must merge aliases without losing references.
Which z/OS practice fits?
A) Edit the catalog bytes directly
B) Use IDCAMS alter/delete/define with a careful plan and catalog-merge utilities, validate in test, then coordinate the change during a maintenance window
C) Skip catalog management and hope datasets find themselves
D) Delete and recreate all datasets
Show solution
Correct answers: B – Explanation:
IDCAMS with a planned, tested change window is z/OS’s catalog reference. Byte edits, skipping management, and mass recreation all fail catalog discipline. Source: Check Source
Question #8 - Workload and Performance
A sysprog at Kernstone Utility sees batch jobs missing their service-class goals during online peak.
Which WLM practice fits?
A) Review and adjust the service classes and performance periods in the WLM policy so batch and online workloads get the right share during peak, then monitor SMF data for the effect
B) Let goals go unmet and accept it
C) Turn off WLM
D) Run batch only on Sundays
Show solution
Correct answers: A – Explanation:
Service-class and performance-period tuning with SMF verification is WLM’s reference. Accepting failures, turning off WLM, and day-of-week gating all fail workload management. Source: Check Source
Question #9 - Workload and Performance
A performance investigation at Langdon Trust needs to correlate job elapsed time with resource usage.
Which z/OS data source fits?
A) Delete SMF data to save disk
B) Guess from the operator console
C) Analyze SMF records (types 30, 70-79 and others as relevant) to correlate elapsed time, CPU, I/O, and memory usage per workload
D) Use only application-level logs with no system view
Show solution
Correct answers: C – Explanation:
SMF analysis is z/OS’s performance-data reference. Guesses, deleted SMF, and app-only logs all fail system-level correlation. Source: Check Source
Question #10 - Networking and Communication
A z/OS TCP/IP stack at Westmyre Bank must be tuned for a new latency-sensitive application.
Which z/OS component fits?
A) Tune the Communications Server TCP/IP profile (socket buffers, policy rules, VIPA) per the v3.x networking guide
B) Ignore Communications Server and tune only application code
C) Disable TCP/IP entirely
D) Route all traffic over VTAM SNA
Show solution
Correct answers: A – Explanation:
Communications Server TCP/IP tuning is z/OS’s networking reference. Ignoring the stack, disabling TCP/IP, and forcing SNA all miss the tool. Source: Check Source
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Exam mode & learn mode · Score by objective · Updated April 17, 2026
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What the C9007900 zos v3 admin exam measures
- Install and apply z/OSMF workflows, SMP/E maintenance, parmlib setup, and release activation to keep mainframe estates current and supportable through planned maintenance windows
- Secure and audit RACF dataset profiles, general-resource classes, MLS, and crypto hardware to enforce granular access control with the audit trail regulators expect from mainframes
- Allocate and tier SMS, DFSMSdss, DFSMShsm, and catalog structures to place datasets on the right storage tier and keep backup and recall times within SLA
- Balance and tune WLM goal mode, SMF data, and performance interventions to sustain throughput on shared hardware while honoring business-priority commitments
- Connect and serve TCP/IP stacks, VTAM definitions, and Communications Server to keep mainframe applications reachable from distributed partners and APIs
How to prepare for this exam
- Review the official exam guide to understand every objective and domain weight before you begin studying
- Work through the relevant IBM Training learning path — ibm certified z os v3 x administrator professional C9007900 — to cover vendor-authored material end-to-end
- Get hands-on inside IBM TechZone or a comparable sandbox so you can practice the console tasks, CLI commands, and APIs the exam expects
- Tackle a real-world project at your workplace, a volunteer role, or an open-source repository where the technology under test is actually in use
- Drill one exam objective at a time, starting with the highest-weighted domain and only moving on once you can teach it to someone else
- Study by objective in PowerKram learn mode, where every explanation links back to authoritative IBM documentation
- Switch to PowerKram exam mode to rehearse under timed conditions and confirm you consistently score above the pass mark
Career paths and salary outlook
z/OS system programmers remain in high demand at banks, insurers, and government agencies running mainframes:
- z/OS Systems Programmer — $120,000–$165,000 per year, running mainframe estates at banks and insurers (Glassdoor salary data)
- Senior Mainframe Engineer — $135,000–$180,000 per year, leading z/OS upgrade and modernization work (Indeed salary data)
- Mainframe Consultant — $130,000–$180,000 per year, advising enterprises on z/OS strategy and modernization (Glassdoor salary data)
Official resources
Work through the official IBM Training learning path for this certification, which bundles videos, labs, and skill tasks aligned to every objective. The official exam page lists the full objective breakdown, prerequisite knowledge, and scheduling details.