- A
The keyboard's battery is low
Why wrong: Low battery can cause intermittent issues, but it usually results in disconnection rather than slow typing with missed keystrokes. The scanner works fine, suggesting the Bluetooth radio is functional.
- B
The tablet's Bluetooth driver is outdated
Why wrong: An outdated driver could cause general Bluetooth issues, but the scanner works perfectly, making a driver problem less likely.
- C
Interference from the rugged case or other wireless signals is degrading the keyboard's connection
Rugged cases can contain metal or shielding that interferes with Bluetooth signals. The keyboard's antenna may be more susceptible than the scanner's.
- D
The keyboard is not compatible with Android
Why wrong: If the keyboard pairs and connects, it is compatible. Missed keystrokes are a performance issue, not a compatibility one.
Bluetooth Keyboard Typing Slowly or Missing Keystrokes: Interference Causes
This 220-1201 practice question tests your understanding of mobile devices troubleshooting. 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 technician is configuring a new Android tablet for a field worker. The worker will use a Bluetooth barcode scanner and a rugged case with a built-in keyboard. After pairing both devices, the keyboard types slowly and misses keystrokes, while the scanner works fine. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Quick Answer
The answer is interference from the rugged case or other wireless signals degrading the keyboard’s connection. Bluetooth operates in the 2.4 GHz frequency band, which is crowded with signals from Wi-Fi, USB 3.0 ports, and even the metal components of a rugged case that can physically block or reflect radio waves. This signal degradation causes packet loss, resulting in slow or missed keystrokes, while the barcode scanner may remain unaffected because it uses a different Bluetooth profile (like HID over GATT) or is less sensitive to interference. On the CompTIA A+ Core 1 220-1201 exam, this scenario tests your understanding of Bluetooth interference sources and troubleshooting—a common trap is assuming the keyboard is defective or that the tablet’s Bluetooth adapter is faulty. Remember the memory tip: “Case and waves cause delays and saves”—the rugged case and surrounding wireless signals are the culprits, not the devices themselves.
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
Interference from the rugged case or other wireless signals is degrading the keyboard's connection
Bluetooth interference from other devices or physical obstructions (like a rugged case) can cause signal degradation, leading to missed keystrokes. The scanner may use a different Bluetooth profile or be less sensitive to interference. The correct answer identifies interference as the likely cause.
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.
- ✗
The keyboard's battery is low
Why it's wrong here
Low battery can cause intermittent issues, but it usually results in disconnection rather than slow typing with missed keystrokes. The scanner works fine, suggesting the Bluetooth radio is functional.
- ✗
The tablet's Bluetooth driver is outdated
Why it's wrong here
An outdated driver could cause general Bluetooth issues, but the scanner works perfectly, making a driver problem less likely.
- ✓
Interference from the rugged case or other wireless signals is degrading the keyboard's connection
Why this is correct
Rugged cases can contain metal or shielding that interferes with Bluetooth signals. The keyboard's antenna may be more susceptible than the scanner's.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The keyboard is not compatible with Android
Why it's wrong here
If the keyboard pairs and connects, it is compatible. Missed keystrokes are a performance issue, not a compatibility one.
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.
What to study next
Got this wrong? Here's your next step.
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.
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Mobile Devices Troubleshooting — study guide chapter
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FAQ
Questions learners often ask
What does this 220-1201 question test?
Mobile Devices Troubleshooting — This question tests Mobile Devices Troubleshooting — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Interference from the rugged case or other wireless signals is degrading the keyboard's connection — Bluetooth interference from other devices or physical obstructions (like a rugged case) can cause signal degradation, leading to missed keystrokes. The scanner may use a different Bluetooth profile or be less sensitive to interference. The correct answer identifies interference as the likely cause.
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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 18, 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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