LPIC-1 Linux Installation and Package Management Practice Question
This LPIC-1 practice question tests your understanding of linux installation and package management. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Exhibit
Name : kernel-core
Version : 4.18.0
Release : 348.el8
Architecture: x86_64
Install Date: Mon 10 Jan 2022 10:00:00 AM EST
Group : System Environment/Kernel
Size : 73456789
License : GPLv2
Signature : RSA/SHA256, Mon 10 Jan 2022 09:00:00 AM EST, Key ID 12345678
Source RPM : kernel-4.18.0-348.el8.src.rpm
Build Date : Mon 10 Jan 2022 08:00:00 AM EST
Build Host : x86-02.mbox.example.com
URL : http://www.kernel.org/
Summary : The kernel core image
Description : This package contains the kernel core image.
Refer to the exhibit. An administrator wants to verify the integrity of the kernel-core package by checking its signature. Which command is used?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "which command"
Why it matters: Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
Name : kernel-core
Version : 4.18.0
Release : 348.el8
Architecture: x86_64
Install Date: Mon 10 Jan 2022 10:00:00 AM EST
Group : System Environment/Kernel
Size : 73456789
License : GPLv2
Signature : RSA/SHA256, Mon 10 Jan 2022 09:00:00 AM EST, Key ID 12345678
Source RPM : kernel-4.18.0-348.el8.src.rpm
Build Date : Mon 10 Jan 2022 08:00:00 AM EST
Build Host : x86-02.mbox.example.com
URL : http://www.kernel.org/
Summary : The kernel core image
Description : This package contains the kernel core image.
A
`rpm -qa kernel-core`
Why wrong: Lists all packages, does not check signature.
B
`rpm -q --changelog kernel-core`
Why wrong: Shows changelog, not signature.
C
`rpm -K kernel-core`
Checks the package signature.
D
`rpm -V kernel-core`
Why wrong: Verifies installed file attributes, not signature.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
`rpm -K kernel-core`
`rpm -K` (or `rpm --checksig`) checks the GPG signature of the package. `rpm -V` verifies file integrity against the database, not signature. `rpm --verify` is same as -V. `rpm -q --changelog` shows changelog. `rpm -qa` lists all packages.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
`rpm -qa kernel-core`
Why it's wrong here
Lists all packages, does not check signature.
✗
`rpm -q --changelog kernel-core`
Why it's wrong here
Shows changelog, not signature.
✓
`rpm -K kernel-core`
Why this is correct
Checks the package signature.
Clue confirmation
The clue word "which command" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
`rpm -V kernel-core`
Why it's wrong here
Verifies installed file attributes, not signature.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Trap categories for this question
Command / output trap
Shows changelog, not signature.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related LPIC-1 NAT questions on configuration and troubleshooting.
Linux Installation and Package Management — This question tests Linux Installation and Package Management — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: `rpm -K kernel-core` — `rpm -K` (or `rpm --checksig`) checks the GPG signature of the package. `rpm -V` verifies file integrity against the database, not signature. `rpm --verify` is same as -V. `rpm -q --changelog` shows changelog. `rpm -qa` lists all packages.
What should I do if I get this LPIC-1 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related LPIC-1 NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "which command". Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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