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 (15)
✍️ Sample LCA Questions & Answers
1. 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.
2. 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.
3. What is the purpose of the `mount` command in Linux?
The `mount` command in Linux is used to attach a file system from a storage device to a specific directory in the existing file system hierarchy. This makes the files and directories on that device accessible through the specified mount point. Without mounting, the contents of the device cannot be accessed by the operating system.
4. When a LCA professional encounters an unfamiliar challenge in virtualization & container management, what is the recommended first course of action?
Professional practice requires a methodical approach to unfamiliar challenges: research the applicable standards, consult experts when needed, and document the reasoning for the chosen approach.
5. Which command is used to create a new ext4 file system in Linux?
The `mkfs.ext4` command is specifically used to create an Ext4 file system on a specified partition or device. `mkfs` stands for "make filesystem," and the `.ext4` suffix indicates the type of file system to be created. This command initializes the file system structure, making the partition ready to store data.
6. When a LCA professional encounters an unfamiliar challenge in performance monitoring & tuning, what is the recommended first course of action?
Professional practice requires a methodical approach to unfamiliar challenges: research the applicable standards, consult experts when needed, and document the reasoning for the chosen approach.