- A
A USB-C hub with multiple ports.
Why wrong: A hub would provide additional ports, but it still needs a 3.5mm adapter to connect the headset. It is an unnecessary extra step.
- B
A Bluetooth audio adapter for the headset.
Why wrong: This would make the headset wireless, but the user specifically wants a wired connection.
- C
A USB-C to 3.5mm adapter.
This adapter plugs into the tablet's USB-C port and provides a 3.5mm jack for the headset, enabling wired audio.
- D
A 3.5mm Y-splitter cable.
Why wrong: A Y-splitter requires a 3.5mm source, which the tablet does not have, so it is useless in this scenario.
Question 164 of 1,020
220-1201 Mobile Device Accessories Practice Question
This 220-1201 practice question tests your understanding of mobile device accessories. 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 use a wired headset with their tablet for voice calls, but the tablet only has a single USB-C port and no 3.5mm jack. The headset has a 3.5mm plug. Which accessory should you recommend?
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
✓
A USB-C to 3.5mm adapter.
Option C is correct because a USB-C to 3.5mm adapter converts the digital audio signal from the USB-C port into an analog signal that the wired headset can use. This adapter typically includes a built-in DAC (Digital-to-Analog Converter) to handle the conversion, enabling voice calls through the tablet's USB-C port without requiring additional power or Bluetooth pairing.
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.
- ✗
A USB-C hub with multiple ports.
Why it's wrong here
A hub would provide additional ports, but it still needs a 3.5mm adapter to connect the headset. It is an unnecessary extra step.
- ✗
A Bluetooth audio adapter for the headset.
Why it's wrong here
This would make the headset wireless, but the user specifically wants a wired connection.
- ✓
A USB-C to 3.5mm adapter.
Why this is correct
This adapter plugs into the tablet's USB-C port and provides a 3.5mm jack for the headset, enabling wired audio.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
A 3.5mm Y-splitter cable.
Why it's wrong here
A Y-splitter requires a 3.5mm source, which the tablet does not have, so it is useless in this scenario.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CompTIA A+ often tests the misconception that a USB-C hub (Option A) is a universal solution for all port shortages, but candidates must recognize that audio output requires a specific adapter with a DAC, not just any hub.
Trap categories for this question
Scenario analysis trap
A Y-splitter requires a 3.5mm source, which the tablet does not have, so it is useless in this scenario.
Detailed technical explanation
How to think about this question
USB-C audio adapters rely on the USB Audio Device Class specification to stream digital audio over the USB bus, with the adapter's DAC converting PCM (Pulse Code Modulation) data to analog signals. Some adapters also support analog audio pass-through if the USB-C port is wired for it (e.g., on certain smartphones), but most tablets require an active DAC. In real-world scenarios, users may encounter compatibility issues if the adapter does not support the headset's microphone input, as some adapters only provide stereo output without a mic channel.
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.
Quick reference
Access Control Model Comparison
| Model | Acronym | Who Controls Access? | Best For |
|---|---|---|---|
| Discretionary Access Control | DAC | Resource owner | Small teams, file shares |
| Mandatory Access Control | MAC | System / security labels | Classified govt / military |
| Role-Based Access Control | RBAC | Administrator (via roles) | Enterprise environments |
| Attribute-Based Access Control | ABAC | Policy engine (user + resource attributes) | Fine-grained, dynamic policies |
| Rule-Based Access Control | RuBAC | System rules / ACLs | Firewall rules, network ACLs |
What to study next
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FAQ
Questions learners often ask
What does this 220-1201 question test?
Mobile Device Accessories — This question tests Mobile Device Accessories — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: A USB-C to 3.5mm adapter. — Option C is correct because a USB-C to 3.5mm adapter converts the digital audio signal from the USB-C port into an analog signal that the wired headset can use. This adapter typically includes a built-in DAC (Digital-to-Analog Converter) to handle the conversion, enabling voice calls through the tablet's USB-C port without requiring additional power or Bluetooth pairing.
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
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