Quick Answer
The answer is an if-else statement. This control structure is the correct choice because it evaluates a single condition—in this case, whether the user’s age is 18 or over—and then executes one block of code if the condition is true (displaying 'Adult') and a different block if it is false (displaying 'Minor'). On the CompTIA ITF+ FC0-U61 exam, the if-else control structure tests your understanding of binary decision-making, where exactly two outcomes are possible based on a true/false condition. A common trap is confusing it with a switch-case, which is better suited for testing multiple discrete values, or with loops like for or while, which are for repetition, not selection. To remember, think of the if-else as a fork in the road: one path for adults, the other for minors, with no third option.
This FC0-U61 practice question tests your understanding of software development concepts. 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 program needs to display a message based on a user's age. If age is 18 or over, it displays 'Adult'; otherwise, it displays 'Minor'. Which control structure should be used?
If-else statement
If-else evaluates a condition and executes one of two blocks.
For loop
Why wrong: For loop is for repeating a block a fixed number of times, not for a simple condition.
Switch-case statement
Why wrong: Switch-case is used when there are many discrete values, not a range condition like age >= 18.
While loop
Why wrong: While loop repeats until a condition is false; it's not suitable for a single decision.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
If-else statement
An if-else statement is used to choose between two code paths based on a condition. A for loop is for iteration. A while loop repeats until a condition is false. A switch-case tests multiple discrete values.
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.
If-else statement
Why this is correct
If-else evaluates a condition and executes one of two blocks.
Related concept
Static NAT maps one inside address to one outside address.
For loop
Why it's wrong here
For loop is for repeating a block a fixed number of times, not for a simple condition.
Switch-case statement
Why it's wrong here
Switch-case is used when there are many discrete values, not a range condition like age >= 18.
While loop
Why it's wrong here
While loop repeats until a condition is false; it's not suitable for a single decision.
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 FC0-U61 NAT questions on configuration and troubleshooting.
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FAQ
Software Development Concepts — This question tests Software Development Concepts — Static NAT maps one inside address to one outside address..
The correct answer is: If-else statement — An if-else statement is used to choose between two code paths based on a condition. A for loop is for iteration. A while loop repeats until a condition is false. A switch-case tests multiple discrete values.
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 FC0-U61 NAT questions on configuration and troubleshooting.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 24, 2026
This FC0-U61 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the FC0-U61 exam.
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