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Exam Information
Official specifications published by IBM
Exam Format
90 min
63
45 out of 63
Developer
Registration
$200 USD
Pearson VUE or online proctoring
Validity
3 years
Pass a newer version of the exam; Complete IBM continuing education requirements; Pass a higher-level IBM certification exam
C1000-155 Exam Topics and Domains
C1000-155 is organized into 10 weighted domains. Expect to work with JAX-RS, Liberty Dev Mode, Liberty Server, Docker, and more.
1
Liberty concepts
8%
Liberty server configurationServer configuration flexibility
Java runtime optimizationOpenJ9 and IBM Semeru
WebSphere Liberty features and zero migration
Liberty feature architecture
- Understand WebSphere Liberty features and zero migration
- Understand the composability and flexibility of Liberty server configuration
- Understand that OpenJ9/IBM Semeru is the recommended Java runtime
2
Concepts of cloud-native Java and microservices
7%
12 and 15 factor appsFactor app methodology
MicroProfile standardsMicroProfile APIs
Cloud-native Java and microservices with Liberty
Cloud-native principles
- Understand cloud-native Java and microservices with Liberty
- Apply 12 and 15 factor app principles
- Demonstrate knowledge of standards-based cloud-native Java API through MicroProfile
3
Developer experience and tools
8%
Liberty instance managementServer lifecycle
Liberty configurationServer configuration
Build and run Liberty application with Maven
Maven integration
- Build and run Liberty application with Maven
- Start and stop a Liberty instance
- Configure a Liberty instance
4
Develop cloud-native Java microservices
25%
GraphQL integrationGraphQL alternatives
API documentationOpenAPI documentation
Configuration managementExternal configuration
Input validation
Web application input validation
- Validate user input into web applications
- Write RESTful clients to request data
- Implement synchronous and asynchronous REST clients
- Use alternatives to REST (GraphQL)
- Document microservice APIs
- Configure microservices externally
RESTful services
REST client developmentAsynchronous REST
5
Data persistence and transactions
6%
Session managementDistributed session caching
Java Persistence API
JPA implementation
- Use Java Persistence API (JPA) to access and persist data
- Implement distributed session caching
6
Security
11%
API securityREST API security
Single Sign-OnSSO implementation
Security hardeningProduction security
TLS configurationTransport Layer Security
Core security concepts
Security fundamentals
- Understand core security concepts
- Secure RESTful APIs
- Consume secured RESTful APIs using JWT with SSO
- Secure web applications with SSO
- Validate user input
- Understand security hardening
- Secure communications with TLS
7
Add telemetry/observability to microservices
16%
Metrics collectionApplication metrics
Health checks
Microservice health
- Add health checks to microservices
- Provide metrics on microservices
8
Test microservices
6%
Contract testingAPI contract testing
Integration testing
True-to-production testing
- Implement true-to-production integration testing
- Contract test microservice APIs
9
Containerize and deploy
5%
Podman containerizationPodman usage
Kubernetes deploymentOpen Liberty Operator
Docker containerization
Docker implementation
- Containerize Liberty applications using Docker
- Containerize Liberty applications using Podman
- Deploy applications to Kubernetes using Open Liberty Operator
10
Monitor and troubleshoot
8%
Log managementLog processing
Performance monitoringRequest monitoring
Logging and tracing
Application logging
- Configure log and trace
- Manage logs effectively
- Analyze JSON logs
- Detect slow and hung requests
- Monitor with metrics
How do I earn this certification?
Passing C1000-155 earns the IBM Certified Developer - Cloud Native Java with IBM Liberty 2023 certification. It sits in the Cloud Native Development track.
Next Level Options
Alternative Paths
- C1000-169 - IBM Cloud Associate SRE V2 Complementary cloud operations skills
- C1000-166 - IBM Cloud Professional Developer v6Broader cloud development expertise
- C1000-182 - IBM Sterling File Gateway v6.2 Administration Enterprise integration skills
Practice with Precision
The PlanetCert Simulator mirrors the real exam environment with authentic questions and timed pressure.
How to study for this exam?
The most effective way to prepare for C1000-155 is by using the PlanetCert Simulator to practice questions and review detailed explanations.
What's changed on this exam?
Current Status
- ACTIVE
- Last content update: 2023
- Announcement date: 2023
Updates
- Open Liberty 24.0.0.x New features likely in next exam update • Release date: 2024
- MicroProfile 6.0 Core exam content updated to reflect new specifications • Release date: 2023-06-20
- Jakarta EE 10 Migration from Java EE to Jakarta EE naming • Release date: 2022-09-22
Who should take this exam?
- Experience with Java EE/Jakarta EE development
- Knowledge of MicroProfile APIs
- Familiarity with containerization and Kubernetes
- Understanding of cloud-native application development
- Experience with RESTful web services
- Basic knowledge of Liberty server administration