WGU D420 – Linux Foundations Final
Prep Exam (Latest Update 2026/2027)
Questions and Verified Answers | 100%
Correct | Grade A.
1. Which component of a Linux system is responsible for managing
hardware resources and providing an interface between hardware and
software?
A. Shell
B. Package manager
C. Kernel
D. Desktop environment
The kernel is the core component of a Linux operating system. It
manages CPU, memory, devices, and system calls, allowing applications
to communicate with hardware. The shell and desktop environment
provide user interfaces, but they do not directly manage hardware
resources.
2. Which Linux command is used to display the current working
directory?
A. cd
B. ls
,C. pwd
D. dir
The pwd command stands for “print working directory” and displays the
full path of the directory the user is currently located in. The cd
command changes directories, while ls lists directory contents.
3. What does the Linux file permission value 755 represent?
A. Owner has read/write permissions, others have no access
B. Owner has read/write/execute, group and others have
read/execute permissions
C. Everyone has full permissions
D. Owner has read-only access, others have full access
Linux permissions use numeric values where read=4, write=2, and
execute=1. A value of 755 gives the owner permissions of 7
(read/write/execute) and the group and others permissions of 5
(read/execute).
4. Which Linux directory typically contains essential system
configuration files?
A. /home
B. /tmp
C. /etc
D. /var
,/etc contains system-wide configuration files used by Linux services and
applications. The /home directory stores user files, /tmp stores
temporary files, and /var stores variable data such as logs.
5. Which command is commonly used to list files and directories in
Linux?
A. show
B. ls
C. listdir
D. view
The ls command displays the contents of directories. Options such as ls -l
provide detailed information including permissions, ownership, and file
size.
6. Which Linux shell is commonly the default shell for many
distributions?
A. PowerShell
B. Command Prompt
C. Bash
D. Zsh only
Bash (Bourne Again Shell) is one of the most widely used Linux
command-line shells. It provides command execution, scripting
capabilities, and environment management.
7. Which command is used to create a new directory in Linux?
, A. make
B. newdir
C. mkdir
D. createdir
The mkdir command creates new directories. For example, “mkdir
documents” creates a directory named documents in the current
location.
8. What is the primary purpose of the sudo command?
A. Delete system files
B. Change the Linux kernel
C. Execute commands with elevated privileges
D. Display user information
The sudo command allows authorized users to run commands with
administrative privileges. It is commonly used instead of logging in
directly as the root user.
9. Which Linux command displays currently running processes?
A. jobsystem
B. process
C. ps
D. tasklist
The ps command displays information about active processes.
Additional tools such as top and htop provide real-time process
monitoring.
Prep Exam (Latest Update 2026/2027)
Questions and Verified Answers | 100%
Correct | Grade A.
1. Which component of a Linux system is responsible for managing
hardware resources and providing an interface between hardware and
software?
A. Shell
B. Package manager
C. Kernel
D. Desktop environment
The kernel is the core component of a Linux operating system. It
manages CPU, memory, devices, and system calls, allowing applications
to communicate with hardware. The shell and desktop environment
provide user interfaces, but they do not directly manage hardware
resources.
2. Which Linux command is used to display the current working
directory?
A. cd
B. ls
,C. pwd
D. dir
The pwd command stands for “print working directory” and displays the
full path of the directory the user is currently located in. The cd
command changes directories, while ls lists directory contents.
3. What does the Linux file permission value 755 represent?
A. Owner has read/write permissions, others have no access
B. Owner has read/write/execute, group and others have
read/execute permissions
C. Everyone has full permissions
D. Owner has read-only access, others have full access
Linux permissions use numeric values where read=4, write=2, and
execute=1. A value of 755 gives the owner permissions of 7
(read/write/execute) and the group and others permissions of 5
(read/execute).
4. Which Linux directory typically contains essential system
configuration files?
A. /home
B. /tmp
C. /etc
D. /var
,/etc contains system-wide configuration files used by Linux services and
applications. The /home directory stores user files, /tmp stores
temporary files, and /var stores variable data such as logs.
5. Which command is commonly used to list files and directories in
Linux?
A. show
B. ls
C. listdir
D. view
The ls command displays the contents of directories. Options such as ls -l
provide detailed information including permissions, ownership, and file
size.
6. Which Linux shell is commonly the default shell for many
distributions?
A. PowerShell
B. Command Prompt
C. Bash
D. Zsh only
Bash (Bourne Again Shell) is one of the most widely used Linux
command-line shells. It provides command execution, scripting
capabilities, and environment management.
7. Which command is used to create a new directory in Linux?
, A. make
B. newdir
C. mkdir
D. createdir
The mkdir command creates new directories. For example, “mkdir
documents” creates a directory named documents in the current
location.
8. What is the primary purpose of the sudo command?
A. Delete system files
B. Change the Linux kernel
C. Execute commands with elevated privileges
D. Display user information
The sudo command allows authorized users to run commands with
administrative privileges. It is commonly used instead of logging in
directly as the root user.
9. Which Linux command displays currently running processes?
A. jobsystem
B. process
C. ps
D. tasklist
The ps command displays information about active processes.
Additional tools such as top and htop provide real-time process
monitoring.
