The preparation is done. The domains have been studied, the commands have been practiced, the checkpoints have been passed. What remains is the final consolidation and the exam itself. This chapter is a review of the highest-yield facts from each domain, followed by the practical guidance for exam day: what to bring, how to pace…
The LFCA exam covers six domains with different weights, and most candidates prepare for it while working full time. An eight-week plan is long enough to cover every domain without rushing and short enough to keep the material fresh. The plan is not a schedule of hours per day; it is a sequence of topics…
Domain 5, DevOps Fundamentals, is 12% of the LFCA exam—roughly 7 questions. It covers the practices and tools that bridge development and operations: CI/CD pipelines, Git version control, container fundamentals, and deployment environments. These are conceptual questions with a practical core. The exam tests whether you understand what continuous integration and continuous delivery mean, how…
Domain 4, Security Fundamentals, is 14% of the LFCA exam—roughly 8 questions. It covers the concepts that underpin security in modern IT: the CIA triad, authentication and authorization, encryption, firewalls, compliance, and common threats. These are conceptual questions. There are no commands to memorize, no configurations to build. The exam tests whether you understand the…
Domain 3, Cloud Computing Fundamentals, is 18% of the LFCA exam—roughly 11 questions. It is the second-largest domain, and it is entirely conceptual. There are no commands to memorize, no configurations to build. The questions test whether you understand what the cloud is, how it is delivered, how it is deployed, and how it is…
Domain 2, Linux Fundamentals, is 16% of the LFCA exam—roughly 10 questions. It covers the Linux operating system itself: distributions and their package managers, the Filesystem Hierarchy Standard, open source licensing, and the command line. These are the questions that test whether you understand how Linux is organized, not just how to run commands. This…
The LFCA exam asks 60 multiple-choice questions in 90 minutes. Domain 1, System Administration Fundamentals, is the heaviest domain at 30% of the exam—roughly 18 questions. It covers user and group management, file permissions, process and service management, networking fundamentals, troubleshooting methodology, and disaster recovery. These are the questions where practical familiarity with commands matters…
The LFCA exam was updated on September 16, 2025. The domains remained the same, but the competencies within each domain were adjusted. If you sit for the exam after that date, the updated objectives apply regardless of when you purchased the exam . This chapter is a structured review of the six domains, their weights,…
Containers are not virtual machines. A container is a process—or a small group of processes—running on the host kernel, isolated by namespaces and constrained by cgroups. This distinction matters for the deployment workflow. There is no boot sequence, no init system, no hypervisor. A container starts in milliseconds, runs until its main process exits, and…
A network problem is a mystery with layers. The user reports that “the internet is down.” The application logs show connection timeouts. The monitoring system fires an alert about packet loss. Each of these symptoms is real, but none of them tells you where the problem actually lives. Is it the cable? The interface? The…