- A
USB-C to USB-A adapter
Why wrong: USB-A does not carry video signals; this adapter only provides data connectivity.
- B
USB-C to HDMI adapter
This adapter converts the DisplayPort signal from USB-C Alt Mode to HDMI, allowing connection to the monitor.
- C
USB-C to DisplayPort cable
Why wrong: This would work if the monitor had DisplayPort input, but the monitor only has HDMI.
- D
USB-C to VGA adapter
Why wrong: VGA is analog and does not support 4K resolution; also the monitor has HDMI, not VGA.
Question 399 of 1,020
220-1201 Mobile Device Connection Methods Practice Question
This 220-1201 practice question tests your understanding of mobile device connection methods. 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 user wants to connect their laptop to a 4K external monitor using a USB-C port that supports DisplayPort Alt Mode. The monitor has only HDMI input. Which adapter or cable is required?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
USB-C to HDMI adapter
Option B is correct because the laptop's USB-C port supports DisplayPort Alt Mode, which can carry a DisplayPort signal over the USB-C connector. Since the monitor only has HDMI input, a USB-C to HDMI adapter converts the DisplayPort signal from Alt Mode into an HDMI-compatible signal, enabling the 4K video output.
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.
- ✗
USB-C to USB-A adapter
Why it's wrong here
USB-A does not carry video signals; this adapter only provides data connectivity.
- ✓
USB-C to HDMI adapter
Why this is correct
This adapter converts the DisplayPort signal from USB-C Alt Mode to HDMI, allowing connection to the monitor.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
USB-C to DisplayPort cable
Why it's wrong here
This would work if the monitor had DisplayPort input, but the monitor only has HDMI.
- ✗
USB-C to VGA adapter
Why it's wrong here
VGA is analog and does not support 4K resolution; also the monitor has HDMI, not VGA.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The 220-1201 exam often tests the misconception that a USB-C to DisplayPort cable would work because the port supports DisplayPort Alt Mode, but the trap is that the monitor's input (HDMI) requires a different signal format, so a direct DisplayPort cable is incompatible without an active converter.
Detailed technical explanation
How to think about this question
USB-C DisplayPort Alt Mode uses the USB-C connector's SuperSpeed lanes to carry native DisplayPort signals, which can be passively adapted to HDMI using a simple cable or adapter that maps the DisplayPort TMDS signals to HDMI. However, for 4K at higher refresh rates (e.g., 60 Hz), the adapter must support HDMI 2.0 or later, as older passive adapters may be limited to HDMI 1.4 (4K at 30 Hz). In real-world scenarios, users often mistakenly assume any USB-C to HDMI cable works, but only those explicitly supporting Alt Mode (not just USB 3.1 data) will function.
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 220-1201 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.
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FAQ
Questions learners often ask
What does this 220-1201 question test?
Mobile Device Connection Methods — This question tests Mobile Device Connection Methods — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: USB-C to HDMI adapter — Option B is correct because the laptop's USB-C port supports DisplayPort Alt Mode, which can carry a DisplayPort signal over the USB-C connector. Since the monitor only has HDMI input, a USB-C to HDMI adapter converts the DisplayPort signal from Alt Mode into an HDMI-compatible signal, enabling the 4K video output.
What should I do if I get this 220-1201 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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Last reviewed: Jul 4, 2026
This 220-1201 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 220-1201 exam.
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