Oracle Cloud Infrastructure for Sunbird ED Specialty Advanced Practice Exam: Hard Questions 2025

You are designing a Sunbird ED deployment on OCI for a nationwide utility. Requirements: (1) low-latency local access for operators in multiple regions, (2) centralized control-plane governance, (3) tolerate the loss of an entire OCI region with minimal operational disruption, and (4) avoid split-brain for stateful ED services. Which architecture best meets these constraints?

After deploying Sunbird ED services on OCI, intermittent command execution delays occur only during peak telemetry bursts. Metrics show CPU is stable, but network packet drops spike on a subset of application VMs. You also observe that the affected instances share the same VNIC and subnet configuration. Which remediation is most appropriate first, assuming application code cannot be changed?

A Sunbird ED environment must integrate with multiple upstream corporate systems over a private connection. The corporate network requires overlapping RFC1918 address space with the OCI VCN and refuses renumbering. You must ensure deterministic routing and prevent ambiguous traffic paths while keeping ED services private. What is the best OCI networking approach?

You are hardening an OCI tenancy hosting Sunbird ED. A security review finds that multiple teams can create overly permissive network rules and also attach public IPs to ED application instances. You must enforce preventative controls (not just detective) while allowing teams to continue deploying via IaC. Which combination is most appropriate?

A Sunbird ED deployment uses multiple subnets and NSGs. After introducing a new bastion and tightening rules, application nodes can no longer reach an internal ED service on TCP/8443. VCN route tables are unchanged and show local routing is correct. VCN flow logs show traffic is allowed at the subnet security list level but is dropped at the VNIC. What is the most likely cause?

During an ED maintenance window, you need to roll out a configuration change across a fleet of OCI compute instances while ensuring: (1) controlled blast radius, (2) ability to automatically roll back if health checks fail, and (3) minimal manual steps. Which approach is most appropriate?

Your Sunbird ED services intermittently fail to start after node reboots. The failures correlate with storage-heavy periods. Logs show timeouts waiting for dependent data volumes to become available, but the OCI console shows volumes are attached. What operational change best improves reliability without over-provisioning?

A critical ED component requires guaranteed low-latency access to a shared configuration dataset and performs poorly when the dataset is accessed over NFS during high concurrency. You need to keep the dataset centrally managed and consistent while improving performance and resiliency. Which option is the best fit on OCI?

A security incident response exercise reveals that operators have long-lived SSH keys and broad sudo access on ED hosts. You must reduce credential exposure and enforce least privilege while preserving break-glass access for emergencies. Which solution best aligns with OCI best practices?

You must design autoscaling for a stateless Sunbird ED API tier. The challenge: traffic spikes are short-lived and bursty, and scale-out must not overload downstream stateful services. You want fast response to bursts but controlled downstream impact. Which strategy is most appropriate?