This EX200 practice question tests your understanding of manage containers. 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.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Container port 80 is mapped to host port 8080.
The exhibit shows the container 'webserver' with port mapping '0.0.0.0:8080->80/tcp'. This indicates that host port 8080 is mapped to container port 80, meaning traffic arriving at the host on port 8080 is forwarded to port 80 inside the container. Therefore, option A is correct.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Container port 80 is mapped to host port 8080.
Why this is correct
Correct. The output shows container port 80/tcp with HostPort 8080.
Related concept
Read the scenario before looking for a memorised answer.
✗
The container uses the host network.
Why it's wrong here
No indication of host networking; port mapping uses bridge.
✗
Container port 8080 is mapped to host port 80.
Why it's wrong here
The mapping is container port 80 to host port 8080.
✗
No port mapping exists.
Why it's wrong here
The exhibit shows a port mapping.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse the order of port mapping, thinking the first number is the container port and the second is the host port, when in fact the syntax is `host_port:container_port`.
Trap categories for this question
Command / output trap
The exhibit shows a port mapping.
Detailed technical explanation
How to think about this question
In Docker, port mapping is configured with the `-p` flag (e.g., `-p 8080:80`), which binds a host port to a container port. The format `0.0.0.0:8080->80/tcp` means the mapping listens on all host interfaces (0.0.0.0) on port 8080 and forwards TCP traffic to port 80 in the container. This is a common pattern for exposing web services running on port 80 inside a container to a different port on the host, often to avoid conflicts or to use a privileged port indirectly.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the EX200 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Manage containers — This question tests Manage containers — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Container port 80 is mapped to host port 8080. — The exhibit shows the container 'webserver' with port mapping '0.0.0.0:8080->80/tcp'. This indicates that host port 8080 is mapped to container port 80, meaning traffic arriving at the host on port 8080 is forwarded to port 80 inside the container. Therefore, option A is correct.
What should I do if I get this EX200 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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