The answer is a magnetic stripe reader that plugs into the headphone jack. This accessory is essential because a standard smartphone lacks the hardware to read the magnetic stripe or EMV chip on a credit card, so the reader acts as a dedicated peripheral that captures payment data and transmits it to the phone for processing. On the CompTIA A+ Core 1 220-1201 exam, this scenario tests your knowledge of mobile device peripherals and their connectivity methods, often appearing as a straightforward hardware identification question. A common trap is confusing this with a built-in NFC chip, which handles contactless payments but cannot read magnetic stripes or chips directly. Remember the key distinction: for a smartphone POS terminal card reader accessory, the headphone jack or Bluetooth connection is the bridge, not the phone’s own sensors. Memory tip: “Jack for the stripe, tap for the chip” — a headphone jack reader handles the magnetic stripe, while NFC handles tap-to-pay.
220-1101 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 small business owner wants to use a smartphone as a point-of-sale (POS) terminal for credit card payments. They ask which accessory is essential for this setup. What should you recommend?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
A magnetic stripe reader that plugs into the headphone jack.
A card reader that connects to the smartphone via the headphone jack or Bluetooth is essential for processing credit card payments. This accessory allows the phone to read the magnetic stripe or chip. The correct answer is a dedicated card reader.
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 portable Bluetooth speaker for transaction alerts.
Why it's wrong here
A speaker is not needed; the phone's built-in speaker can provide alerts.
✗
A rugged case to protect the phone from drops.
Why it's wrong here
While protective, a rugged case is not essential for POS functionality.
✓
A magnetic stripe reader that plugs into the headphone jack.
Why this is correct
This is correct; such readers are designed for mobile POS systems.
Related concept
Read the scenario before looking for a memorised answer.
✗
A high-capacity power bank for extended use.
Why it's wrong here
A power bank is helpful but not essential for the POS function itself.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 220-1201 question in full detail.
Identify which 220-1201 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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 magnetic stripe reader that plugs into the headphone jack. — A card reader that connects to the smartphone via the headphone jack or Bluetooth is essential for processing credit card payments. This accessory allows the phone to read the magnetic stripe or chip. The correct answer is a dedicated card reader.
What should I do if I get this 220-1201 question wrong?
Identify which 220-1201 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.