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.
A dependency analysis shows that removing package 'libfoo' will also remove 'appA' and 'appB' because they depend on libfoo. The administrator wants to remove libfoo but keep appA and appB. What is the best approach?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Force removal of libfoo using `dpkg --force-depends`.
Why wrong: Would break the dependent applications.
Recompile appA and appB without the dependency on libfoo.
Why wrong: Impractical and time-consuming.
Check if a compatible alternative package exists and install it, then remove libfoo.
Allows removal while preserving dependent applications.
Use `apt-get remove libfoo --no-dep`
Why wrong: No such option exists in apt-get.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Check if a compatible alternative package exists and install it, then remove libfoo.
The best approach is to find a compatible alternative package that provides the same functionality as libfoo and can satisfy the dependencies of appA and appB, then install it before removing libfoo. The other options are flawed: `--no-dep` option does not exist, recompiling both applications is time-consuming and risky, and force removal would break the dependent applications.
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
For each option: why learners choose it and why it is or isn't the right answer here.
Force removal of libfoo using `dpkg --force-depends`.
Why it's wrong here
Would break the dependent applications.
Recompile appA and appB without the dependency on libfoo.
Why it's wrong here
Impractical and time-consuming.
Check if a compatible alternative package exists and install it, then remove libfoo.
Why this is correct
Allows removal while preserving dependent applications.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
Use `apt-get remove libfoo --no-dep`
Why it's wrong here
No such option exists in apt-get.
Common exam traps
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.
Detailed technical explanation
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.
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
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
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.
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FAQ
Linux Installation and Package Management — This question tests Linux Installation and Package Management — Static NAT maps one inside address to one outside address..
The correct answer is: Check if a compatible alternative package exists and install it, then remove libfoo. — The best approach is to find a compatible alternative package that provides the same functionality as libfoo and can satisfy the dependencies of appA and appB, then install it before removing libfoo. The other options are flawed: `--no-dep` option does not exist, recompiling both applications is time-consuming and risky, and force removal would break the dependent applications.
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.
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 24, 2026
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