LCA Study Guide 2026
Everything you need to pass the LCA exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 LCA Exam Format at a Glance
📚 LCA Topics to Study (63)
✍️ Sample LCA Questions & Answers
1. Which command displays real-time per-CPU statistics including user, system, and idle percentages?
mpstat from the sysstat package shows per-processor statistics in real time.
2. What does `set -o pipefail` change about pipeline exit status?
Without `pipefail`, a pipeline's exit status is the last command's status; with it, any failure in the pipeline propagates.
3. What does the `du` command do in Linux?
The `du` command (disk usage) estimates file space usage, specifically showing the amount of disk space consumed by files or directories. When run without arguments, it displays the usage for the current directory and its subdirectories. This is useful for identifying large files or directories that are consuming significant disk space.
4. Which file contains the persistent mount information in Linux?
The `/etc/fstab` file stores persistent mount information, meaning it defines file systems that should be mounted automatically every time the system boots. Each entry in this file specifies a device, its mount point, file system type, and various options. This ensures that critical partitions and devices are always available.
5. In Bacula, which daemon manages job scheduling, client catalog, and coordinates the overall backup/restore process?
The Bacula Director (bacula-dir) is the central control daemon that schedules jobs, maintains the catalog, and coordinates all backup and restore operations.
6. Which configuration file sets the DNS resolver search domain and nameserver addresses on a traditional (non-NetworkManager) Linux system?
/etc/resolv.conf contains 'nameserver' and 'search' directives that configure the system's DNS resolver library.