Three full-length practice tests for the Oracle Cloud Infrastructure Architect Professional (1Z0-997-26) certification exam - 50 questions per test, 90 minutes, 68% to pass, unlimited retakes.
Every question is grounded in Oracle's official exam objectives and product documentation - written fresh for this course, not recycled from public dumps.
What you'll be tested on
- Designing highly available, fault-tolerant, and scalable OCI architectures
- Advanced networking: hub-and-spoke topologies, DRGs, FastConnect, and VPN
- Disaster recovery, backup strategies, and multi-region deployments
- Security architecture: encryption, key management, and compliance controls
- Cost optimization and architecting for performance at enterprise scale
Exam facts
| Exam code | 1Z0-997-26 |
|---|---|
| Format | Multiple choice |
| Delivery | Proctored online |
| Duration | 90 minutes |
| Number of questions | 50 |
| Passing score | 68% |
| Recertification | Cloud Recertification |
Exam domains and weights
The exam covers five objectives, with security carrying the largest share.
| Domain | Weight | Focus |
|---|---|---|
| Architect High Availability and Disaster Recovery Solutions | 15% | Resilient, highly available designs and cross-region failover with Full Stack Disaster Recovery. |
| Architect Cloud-Native Solutions | 20% | Microservices, containers and DevOps on OKE, Container Instances and OCI DevOps; OCIR, Oracle Functions and Resource Manager. |
| Architect Security Solutions | 25% | Layered security: Bastion, Zero Trust Packet Routing, Network Firewall, WAF, Certificates, KMS and Organizations Management. |
| Architecting, Implementing, and Operating Databases in OCI | 20% | Base Database Service, Autonomous AI Database, Autonomous Recovery Service, Globally Distributed Autonomous Database and OCI Cache. |
| Implementing Observability Solutions | 20% | Monitoring, alarms and notifications, logging and audit, Connector Hubs and OCI Search. |
Source: Oracle MyLearn exam page (Review exam topics), captured July 2026.
Where candidates lose points
The advanced networking domain is the biggest trap: candidates who've only worked with a single VCN often haven't touched Dynamic Routing Gateway (DRG) route tables, transit routing between on-premises networks and multiple VCNs, or how FastConnect redundancy interacts with BGP failover. Multi-region disaster recovery design - choosing between active-passive and active-active topologies and reasoning through the RPO/RTO trade-offs of each - is the other consistent weak spot, since it demands architectural judgment rather than recalling a service limit.
Exam code history: 1Z0-997-25 vs 1Z0-997-26
Oracle University listed the previous version of this exam as 1Z0-997-25, under the title "Oracle Cloud Infrastructure 2025 Architect Professional - v2". The current version carries the code 1Z0-997-26. These practice tests are written for 1Z0-997-26 and its published objectives, not for the earlier 1Z0-997-25 exam.
Source: Oracle University exam catalog page for 1Z0-997-25 (Internet Archive capture, March 2026).
Sample question
A company has a hub VCN attached to a Dynamic Routing Gateway (DRG) and three spoke VCNs, each also attached to the same DRG. The company wants traffic from Spoke VCN A to reach Spoke VCN B only through a network virtual appliance running in the hub VCN, while all VCNs must still reach the on-premises network directly through the DRG. Which approach satisfies both requirements?
- A. Attach a single DRG route table to all VCNs and rely on default OCI routing to send inter-spoke traffic through the hub automatically.
- B. Create separate DRG route tables for the spoke attachments that route inter-VCN traffic to the hub VCN's private IP, while using route table rules in each spoke VCN to send on-premises traffic directly to the DRG.
- C. Enable local peering gateways (LPGs) between each pair of spoke VCNs and remove the DRG attachments entirely.
- D. Configure a single route rule with a 0.0.0.0/0 destination pointing at the DRG in every VCN and let the DRG inspect and forward all traffic through the hub automatically.
Full explanations and 149 more questions like this are in the practice tests.
How long to prepare
Given the 68% pass mark across 50 scenario-heavy questions per test, and that this exam assumes an OCI Architect Associate-level foundation plus real design experience, 3-5 weeks of focused study is realistic if you already design multi-VCN, multi-region OCI environments day to day. Add a couple more weeks if hub-and-spoke networking and DR runbook design are new territory for you.
