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100+ Free OCI Developer Professional Practice Questions

Pass your Oracle Cloud Infrastructure 2026 Developer Professional (1Z0-1084-26) exam on the first try — instant access, no signup required.

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Question 1
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Which OCI service is the recommended fan-out mechanism to deliver one event to many subscribers (email, HTTPS, OCI Function, PagerDuty, Slack)?

A
B
C
D
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2026 Statistics

Key Facts: OCI Developer Professional Exam

50

Exam Questions

Oracle 1Z0-1084-26

90 minutes

Time Limit

Oracle 1Z0-1084-26

68%

Passing Score

Oracle 1Z0-1084-26

$245

Exam Fee

Oracle 2026

5

Domains

Oracle topic outline

33%

Containerization Weight

Oracle 1Z0-1084-26

The OCI 2026 Developer Professional exam (1Z0-1084-26) is a 90-minute, 50-question scenario-based test with a 68% passing score and a $245 fee. Domains weight Cloud Native Fundamentals (11%), Containerization (33%), Serverless (33%), Testing and Security (13%), and Monitoring (10%). Pass to demonstrate OCI cloud-native development competency.

Sample OCI Developer Professional Practice Questions

Try these sample questions to test your OCI Developer Professional exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which principle of the 12-factor app methodology requires applications to store configuration in environment variables rather than in code or config files committed to the repository?
A.Codebase
B.Config
C.Backing services
D.Build, release, run
Explanation: Factor III (Config) of the 12-factor methodology states that configuration should be stored in the environment, separated from code, so the same code can be deployed across environments without modification. On OCI, this typically maps to Function configuration values, OKE ConfigMaps, or Vault secrets injected at runtime.
2In a microservices architecture deployed on OCI, which characteristic best distinguishes microservices from a monolithic application?
A.Microservices always run on Kubernetes
B.Each service owns its data store and is independently deployable
C.All microservices share a single relational database
D.Microservices must be written in the same programming language
Explanation: A defining microservices property is bounded-context ownership: each service has its own data store and can be deployed, scaled, and released independently. OCI supports this with per-service Autonomous Databases, NoSQL tables, or Object Storage buckets, plus independent OKE deployments or Functions.
3Which 12-factor principle states that an application's processes should be stateless and share-nothing, with any data that needs to persist stored in a stateful backing service?
A.Disposability
B.Processes
C.Concurrency
D.Port binding
Explanation: Factor VI (Processes) requires the app to execute as one or more stateless processes; persistent data must live in a backing service like Object Storage, Autonomous Database, or OCI Queue. This is what makes horizontal scaling on OKE or Functions possible.
4A team is migrating a monolith to microservices on OCI. Which deployment pattern lets them gradually carve service responsibilities out of the monolith one capability at a time while keeping the system in production?
A.Big bang rewrite
B.Strangler fig
C.Lift and shift
D.Blue-green deployment
Explanation: The Strangler Fig pattern (Martin Fowler) routes specific capabilities to new microservices while the monolith continues to handle the rest, gradually replacing functionality. On OCI it pairs naturally with API Gateway for routing rules that incrementally redirect to new OCI Functions or OKE deployments.
5Which statement best describes the role of an idempotent API design in a cloud-native system on OCI?
A.It guarantees every request returns immediately
B.It allows safe retries after transient failures because repeating a request produces the same result
C.It eliminates the need for authentication
D.It removes the need for monitoring
Explanation: Idempotency means a client can safely retry a request after a transient failure (timeout, 5xx) and the server-side state will not be corrupted. This is critical when calling OCI Functions, Streaming, Queue, or external services through API Gateway because retries are common.
6Which pattern protects a downstream microservice from cascading failure by short-circuiting calls when the failure rate exceeds a threshold?
A.Bulkhead
B.Circuit breaker
C.Sidecar
D.Strangler
Explanation: The circuit breaker pattern monitors call failures; when a threshold is exceeded the breaker opens and short-circuits subsequent calls for a cool-off period. This prevents thread pool exhaustion and gives the downstream service time to recover. It is common in OCI microservices using libraries like Resilience4j or Hystrix-style logic.
7Why is exponential backoff with jitter recommended when retrying failed calls to OCI services from a client SDK?
A.It guarantees a successful retry
B.It reduces the chance that many clients retry simultaneously and overwhelm the service
C.It bypasses OCI rate limits
D.It encrypts the retry payload
Explanation: Exponential backoff increases the delay between retries; jitter adds randomness so independent clients do not synchronize and retry in lockstep. The OCI SDK retry strategies (DefaultRetryStrategy in Java, retry_strategy in Python) implement exponential backoff with jitter to avoid retry storms.
8Which 12-factor principle most directly enables zero-downtime horizontal scaling of an OCI Functions or OKE workload?
A.Logs
B.Concurrency
C.Admin processes
D.Dev/prod parity
Explanation: Factor VIII (Concurrency) tells the app to scale out via the process model, running many small, stateless processes. Functions auto-scale invocations, and OKE uses Deployments and HPA for the same effect. Statelessness (Factor VI) makes this possible.
9In a synchronous request/response chain across three microservices on OCI, what is the recommended way to keep the end-to-end timeout budget realistic?
A.Set every service to a 60-second timeout
B.Make each downstream timeout shorter than its caller's remaining budget
C.Disable timeouts so requests never fail
D.Use the OCI Vault default timeout
Explanation: Each downstream timeout should be smaller than the caller's remaining time budget so an upstream caller never blocks longer than its own timeout. Combined with retries and circuit breakers, this prevents long tail latency from cascading.
10Which characteristic distinguishes a cloud-native application from a traditional application simply hosted on the cloud?
A.It uses any IDE
B.It is designed for elastic scaling, automated operations, and resilience using managed services and containers
C.It runs only on OCI Compute virtual machines
D.It avoids using databases
Explanation: Cloud-native applications are explicitly architected for cloud properties: elasticity, automation, resilience, observability, and independent deployability. They use containers, orchestration (OKE), serverless (Functions), and managed backing services. Hosting a legacy monolith on OCI Compute does not make it cloud-native.

About the OCI Developer Professional Exam

The Oracle Cloud Infrastructure 2026 Developer Professional certification (1Z0-1084-26) validates skills in building, deploying, and operating cloud-native applications on OCI. It covers microservices, OKE, OCI Functions, API Gateway, Streaming, Events, Queue, Vault, observability, and the OCI SDK/CLI.

Questions

50 scored questions

Time Limit

90 minutes

Passing Score

68%

Exam Fee

$245 USD (Oracle University)

OCI Developer Professional Exam Content Outline

11%

Cloud Native Fundamentals

Cloud-native development pillars, microservices design, 12-factor methodology, and how OCI services map to cloud-native principles.

33%

Cloud Native Applications and Containerization

Docker fundamentals, image lifecycle in OCIR, deploying and operating workloads on Oracle Container Engine for Kubernetes (OKE), and OCI Service Mesh.

33%

Leveraging Serverless Technologies

Building Oracle Functions, configuring API Gateway routes and policies, OCI Streaming for real-time data, OCI Events for automation, and OCI Queue for async messaging.

13%

Testing and Securing Cloud Native Applications

OCI Vault for secrets and keys, IAM policies, Resource Principals and instance principals, and testing strategies for distributed microservices.

10%

Monitoring and Troubleshooting

OCI Monitoring metrics and alarms, OCI Logging service, Application Performance Monitoring (APM) with distributed tracing, and troubleshooting cloud-native workloads.

How to Pass the OCI Developer Professional Exam

What You Need to Know

  • Passing score: 68%
  • Exam length: 50 questions
  • Time limit: 90 minutes
  • Exam fee: $245 USD

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

OCI Developer Professional Study Tips from Top Performers

1Build a real OKE cluster and deploy a containerized microservice end-to-end through OCIR
2Write at least one OCI Function in Python or Java and invoke it via API Gateway with auth policies
3Practice Resource Principals from inside Functions to call Object Storage and Vault without static keys
4Configure an OCI Streaming consumer group and contrast it with OCI Queue for async patterns
5Drill IAM policy syntax — verbs, resource-types, and conditions are heavily tested in scenarios
6Use APM and Logging to trace a request across microservices before exam day so observability concepts stick

Frequently Asked Questions

What is on the OCI 2026 Developer Professional exam?

The 1Z0-1084-26 exam covers cloud-native fundamentals (11%), containerization with OKE and OCIR (33%), serverless services like Functions, API Gateway, Streaming, Events, and Queue (33%), testing and security with OCI Vault (13%), and monitoring and troubleshooting (10%).

How long is the 1Z0-1084-26 exam and how many questions?

The exam is 90 minutes long with 50 multiple-choice questions. The passing score is 68%, meaning you must answer at least 34 of 50 questions correctly. Questions are scenario-based rather than purely definitional.

How much does the OCI Developer Professional exam cost?

The 1Z0-1084-26 exam costs $245 USD per attempt. Oracle University training subscriptions sometimes include exam vouchers or discounts. Retakes also cost $245 each.

Is the OCI Developer Professional exam available online?

Yes. You can take 1Z0-1084-26 online with Oracle's online-proctored format or in person at a PSI testing center. Online proctoring requires a webcam, microphone, and a stable internet connection.

What is the difference between Resource Principals and Instance Principals on OCI?

Instance Principals authenticate compute instances to OCI services using IAM, while Resource Principals are used by serverless resources like OCI Functions to call other OCI services without storing credentials. Both eliminate the need for hard-coded API keys.

How should I study for 1Z0-1084-26?

Spend the most time on Containerization (33%) and Serverless (33%) since they make up two-thirds of the exam. Practice with hands-on OKE deployments, write Oracle Functions in Python or Java, configure API Gateway, and use Vault for secrets. Finish with timed mock exams that mirror the 90-minute, 50-question format.