WGU D281 Linux Foundations Exam 2026 -
Complete Actual Exam with Complete Exam
Questions and Detailed Verified Solutions (100%
Correct) | Already Graded A+
Question 1
Which of the following programs are web servers? (Choose two.)
A. Apache HTTPD
B. Postfix
C. Curl
D. Dovecot
E. NGINX
Correct Answer: A, E
Explanation: Apache HTTPD and NGINX are web servers. Postfix and Dovecot are
mail servers. Curl is a command-line tool for transferring data.
Question 2
What are the differences between hard disk drives and solid state disks? (Choose two.)
A. Hard disks have a motor and moving parts, solid state disks do not.
B. Hard disks can fail due to physical damage, while solid state disks cannot fail.
C. Solid state disks can store many times as much data as hard disk drives.
D. /dev/sda is a hard disk device while /dev/ssda is a solid state disk.
E. Solid state disks provide faster access to stored data than hard disks.
Correct Answer: A, E
Explanation: HDDs have moving parts (motor, platters, read/write heads) while SSDs
do not. SSDs provide faster data access due to flash memory technology.
Question 3
Reverse DNS assigns hostnames to IP addresses. How is the name of the IP address
198.51.100.165 stored on a DNS server?
pg. 1
,A. In the A record for 165.100.51.198.ipv4.arpa.
B. In the PTR record for 165.100.51.198.in-addr.arpa.
C. In the RNAME record for 198-51-100-165.rev.arpa.
D. In the ARPA record for 165.100.51.198.rev.
E. In the REV record for arpa.in-addr.198.51.100.165.
Correct Answer: B
Explanation: Reverse DNS lookups use PTR records in the in-addr.arpa domain with
the IP address reversed.
Question 4
Which of the following types of bus can connect hard disk drives with the motherboard?
A. The RAM bus
B. The NUMA bus
C. The CPU bus
D. The SATA bus
E. The Auto bus
Correct Answer: D
Explanation: SATA (Serial ATA) is the standard bus used to connect hard disk drives
and SSDs to motherboards.
Question 5
Members of a team already have experience using Red Hat Enterprise Linux. For a small
hobby project, the team wants to set up a Linux server without paying for a subscription.
Which of the following Linux distributions allows the team members to apply as much
of their Red Hat Enterprise Linux knowledge as possible?
A. Ubuntu Linux LTS
B. Raspbian
C. Debian GNU/Linux
D. CentOS
E. openSUSE
Correct Answer: D
Explanation: CentOS is derived from RHEL source code, making it very similar to
RHEL in administration and usage.
pg. 2
, Question 6
What information can be displayed by top?
A. Existing files, ordered by their size.
B. Running processes, ordered by CPU or RAM consumption.
C. User accounts, ordered by the number of logins.
D. User groups, ordered by the number of members.
E. User accounts, ordered by the number of files.
Correct Answer: B
Explanation: The top command displays running processes and can sort them by CPU
or memory usage.
Question 7
Which of the following commands can be used to resolve a DNS name to an IP address?
A. dnsname
B. dns
C. query
D. host
E. iplookup
Correct Answer: D
Explanation: The host command resolves DNS names to IP addresses.
Question 8
Which of the following outputs comes from the command free?
A.
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 225536 9216 6656 S 0.0 0.1 0:01.23 systemd
2 root 20 0 0 0 0 S 0.0 0.0 0:00.01 kthreadd
3 root 20 0 0 0 0 S 0.0 0.0 0:00.00 rcu_gp
pg. 3
Complete Actual Exam with Complete Exam
Questions and Detailed Verified Solutions (100%
Correct) | Already Graded A+
Question 1
Which of the following programs are web servers? (Choose two.)
A. Apache HTTPD
B. Postfix
C. Curl
D. Dovecot
E. NGINX
Correct Answer: A, E
Explanation: Apache HTTPD and NGINX are web servers. Postfix and Dovecot are
mail servers. Curl is a command-line tool for transferring data.
Question 2
What are the differences between hard disk drives and solid state disks? (Choose two.)
A. Hard disks have a motor and moving parts, solid state disks do not.
B. Hard disks can fail due to physical damage, while solid state disks cannot fail.
C. Solid state disks can store many times as much data as hard disk drives.
D. /dev/sda is a hard disk device while /dev/ssda is a solid state disk.
E. Solid state disks provide faster access to stored data than hard disks.
Correct Answer: A, E
Explanation: HDDs have moving parts (motor, platters, read/write heads) while SSDs
do not. SSDs provide faster data access due to flash memory technology.
Question 3
Reverse DNS assigns hostnames to IP addresses. How is the name of the IP address
198.51.100.165 stored on a DNS server?
pg. 1
,A. In the A record for 165.100.51.198.ipv4.arpa.
B. In the PTR record for 165.100.51.198.in-addr.arpa.
C. In the RNAME record for 198-51-100-165.rev.arpa.
D. In the ARPA record for 165.100.51.198.rev.
E. In the REV record for arpa.in-addr.198.51.100.165.
Correct Answer: B
Explanation: Reverse DNS lookups use PTR records in the in-addr.arpa domain with
the IP address reversed.
Question 4
Which of the following types of bus can connect hard disk drives with the motherboard?
A. The RAM bus
B. The NUMA bus
C. The CPU bus
D. The SATA bus
E. The Auto bus
Correct Answer: D
Explanation: SATA (Serial ATA) is the standard bus used to connect hard disk drives
and SSDs to motherboards.
Question 5
Members of a team already have experience using Red Hat Enterprise Linux. For a small
hobby project, the team wants to set up a Linux server without paying for a subscription.
Which of the following Linux distributions allows the team members to apply as much
of their Red Hat Enterprise Linux knowledge as possible?
A. Ubuntu Linux LTS
B. Raspbian
C. Debian GNU/Linux
D. CentOS
E. openSUSE
Correct Answer: D
Explanation: CentOS is derived from RHEL source code, making it very similar to
RHEL in administration and usage.
pg. 2
, Question 6
What information can be displayed by top?
A. Existing files, ordered by their size.
B. Running processes, ordered by CPU or RAM consumption.
C. User accounts, ordered by the number of logins.
D. User groups, ordered by the number of members.
E. User accounts, ordered by the number of files.
Correct Answer: B
Explanation: The top command displays running processes and can sort them by CPU
or memory usage.
Question 7
Which of the following commands can be used to resolve a DNS name to an IP address?
A. dnsname
B. dns
C. query
D. host
E. iplookup
Correct Answer: D
Explanation: The host command resolves DNS names to IP addresses.
Question 8
Which of the following outputs comes from the command free?
A.
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 225536 9216 6656 S 0.0 0.1 0:01.23 systemd
2 root 20 0 0 0 0 S 0.0 0.0 0:00.01 kthreadd
3 root 20 0 0 0 0 S 0.0 0.0 0:00.00 rcu_gp
pg. 3
