Cloudband Application Manager (CBAM) Test

Focuses on CBAM’s ability to integrate with different VIMs (OpenStack, VMware, Kubernetes). Includes authentication/tenant models, networking (provider VLANs, VXLAN, SR-IOV, DPDK), storage options (ephemeral, persistent volumes), and placement constraints. Evaluates how CBAM ensures resource efficiency, high availability, and performance consistency across cloud substrates.

Examines onboarding processes for VNFs/CNFs using CBAM templates and descriptors. Includes VNFD/NSD schema, lifecycle scripts, parameterization, and validation. Assesses how HOT, OVF, and Helm charts are used for hybrid workloads. Harder questions evaluate multi-VNF service chaining templates, schema evolution, and version compatibility in production-grade deployments.

Evaluates CBAM’s automation capabilities for full VNF/CNF lifecycle management: instantiation, configuration, scaling in/out, healing, upgrades/rollbacks, and termination. Medium-level questions test operational sequencing and dependency graphs, while harder ones require designing safe automation with guardrails, rollback strategies, and blue-green/rolling upgrade patterns.

Assesses CBAM’s role in maintaining service reliability through monitoring and alarm handling. Covers KPI thresholds, telemetry integration, liveness/readiness probes, and EMS/NMS interworking. Hard scenarios require correlating alarms, reducing noise through deduplication/suppression, and designing fault-isolation strategies across regions, racks, or availability zones to minimize downtime.

Focuses on policy-driven lifecycle automation and closed-loop service assurance. Covers intent-based scaling/healing, hysteresis/cooldown for stability, SLA/KPI-driven policies, and feedback loops with analytics. Harder items evaluate advanced assurance designs where CBAM integrates with external assurance platforms to auto-remediate failures or optimize resources without operator intervention.

Tests candidate’s ability to use CBAM’s REST APIs and CLI for automation and DevOps. Includes API authentication/authorization, idempotency, retries, and northbound integrations with NFVO/OSS/BSS. Medium-level questions test practical DevOps pipelines (CI/CD, GitOps, artifact promotion), while harder ones assess governance challenges such as versioning, rollback, and API contract testing.

Examines CBAM’s role in scaling across multiple sites and clouds. Covers HA/DR configurations, active-active and quorum-based failover, capacity planning, NUMA awareness, SR-IOV acceleration, and performance tuning. Hard scenarios include designing disaster recovery strategies across distributed data centers, optimizing latency-sensitive VNFs, and ensuring SLA adherence under failure simulations.

Evaluates how CBAM manages 5G Core VNFs (AMF, SMF, UPF, PCF) and CNFs in hybrid environments. Covers CNF packaging (Helm charts, Operators, CRDs), hybrid service chains across VNFs and CNFs, and integration with SDN for chaining. Harder questions assess slice-aware lifecycle management, drift detection, and interoperability challenges between legacy VNFs and cloud-native workloads.

Assesses CBAM’s ability to enforce security and compliance. Covers RBAC/ABAC, secrets management, certificate handling, mTLS, image signing, and audit trails. Governance aspects include ETSI NFV, 3GPP, and TMF compliance. Hard cases involve multi-tenant isolation, regulator-ready evidence generation, supply-chain validation, and designing security frameworks that protect CBAM-managed workloads in large operator environments.