Infrastructure
Certified Kubernetes Administrator (CKA) #27 Full-Length Practice Exam — 17 Tasks with Solutions
The final post of the Certified Kubernetes Administrator (CKA) series. Work through 17 task scenarios that integrate every domain in the same flow as the real exam, then unfold each task's solution commands, YAML, and explanation to grade yourself. Sum the points against the 66% pass line and lay out a review path for your weak domains.
Certified Kubernetes Security Specialist (CKS) #20 Full-Length Practice Exam — 16 Tasks with Solutions
The final post of the Certified Kubernetes Security Specialist (CKS) series. Work through 16 task scenarios that integrate all six domains in the same flow as the real exam, then unfold each task's solution commands, YAML, and traps to grade yourself. Sum the points against the 67% pass line and lay out a review path for your weak domains.
Hardware Intermediate #4: NUMA — Memory Is Not Uniform
On a server with two or more sockets, memory access speed depends on where the core sits. NUMA structure, the gap between local and remote access, miss ratios as seen in numastat, and how databases and virtualization cope.
Red Hat Certified Engineer (RHCE) #19 Full-Length Practice Exam — 15 Tasks with Solutions
The final post of the Red Hat Certified Engineer (RHCE) series. Work through 15 task scenarios that integrate every domain in the same flow as the real EX294, then unfold each task's solution Ansible playbooks, commands, and explanation to grade yourself. Sum the points against the 210/300 pass line, check idempotency and FQCN, and lay out a review path for your weak domains.
Red Hat Certified System Administrator (RHCSA) #16 Full-Length Practice Exam — 16 Tasks with Solutions
The final post of the Red Hat Certified System Administrator (RHCSA) series. Just like the real EX200, work through 16 task scenarios that integrate every domain, then unfold each task's solution commands and explanation to grade yourself. Sum the points against the 210/300 pass line and verify that your work survives a reboot.
AWS Certified CloudOps Engineer - Associate (SOA-C03) #11 Domain 4-2 Networking — Route 53,CloudFront,Delivery Operations
The eleventh post of the SOA-C03 series covers the second axis of the networking domain: DNS and content delivery. From an operations perspective, it organizes Route 53 record types and routing policies, health checks and failover, CloudFront caching and origin configuration, ACM certificates, and delivery troubleshooting such as caching and latency.
Certified Kubernetes Administrator (CKA) #26: Exam Tips, Time Management, and Patterns People Miss
A condensed cheat sheet to read one more time right before you sit the CKA hands-on exam. We pull together time management for running roughly 15–20 tasks in 2 hours, the priority order driven by points and troubleshooting, a refreshed kubectl speed setup, context switching across multiple clusters, using the official docs, the recurring patterns where operators bleed points and how to avoid them, easily confused concept pairs, and a pre-exam checklist for each of the five domains. Next up in #27 is a full-scale hands-on mock exam.
Certified Kubernetes Application Developer (CKAD) #21 Full-Length Practice Exam — 18 Tasks with Solutions
The final post of the Certified Kubernetes Application Developer (CKAD) series. Work through 18 task scenarios that integrate every domain in the same flow as the real exam, then unfold each task's solution commands, YAML, and explanation to grade yourself. Check your weak domains against the 66% pass line and lay out a review path.
Certified Kubernetes Security Specialist (CKS) #19: Exam tips, time management, and patterns people get wrong
A condensed read to go through one more time right before you sit the CKS hands-on exam. We cover the time management of running roughly 15–20 tasks in 2 hours, prioritizing tasks by tool, re-running the setup right after the exam starts, switching context across multiple clusters, making use of kubernetes.io/docs and the Falco, Trivy, AppArmor, and gVisor official docs, the recurring patterns that leak points on a security hands-on exam and how to avoid them, easily confused concept pairs, and a per-domain pre-exam checklist across all six domains. Next up, #20 is a full-scale hands-on mock exam.
Hardware Intermediate #3: Memory Deep Dive — available, Dirty Pages, Container Limits
The one column that matters in free output, the dirty-page behavior behind sudden write bursts, what swappiness really means, and cgroup memory limits with container OOMKilled — memory as you meet it in operations.
Red Hat Certified Engineer (RHCE) #18: Exam Tips and Time Management
A condensed cheat sheet to read once more right before walking into the RHCE (EX294) hands-on exam. We cover the operating strategy for auto-configuring systems with playbooks over four hours and the habit of piling up tasks, running `--syntax-check` and `--check` often, solving unknown modules with ansible-doc and the system roles example docs in an offline environment, verifying idempotency with two runs, the recurring patterns that bleed points and the easily confused concept pairs, and a per-domain checklist for the moment before you sit. The next post, #19, is a full-scale mock exam.
Red Hat Certified System Administrator (RHCSA) #15: Exam tips, time management, and patterns people get wrong
A compressed read for the moment right before you walk into the RHCSA hands-on exam. We cover the time management that runs your 2.5 hours from the easy tasks outward in dependency order, how to solve unfamiliar tasks with man pages when there is no internet, the habit of verifying tasks with a reboot, the recurring patterns that bleed points across the whole series (fstab typos, missing service enable, missing firewall reload, missing persistent SELinux settings) and how to avoid them, easily confused concept pairs, and a domain-by-domain checklist to run right before you sit. The next post, #16, is a full-scale mock exam.