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220-1201 Practice Question: A technician is setting up a mobile point-of-sale…
A technician is setting up a mobile point-of-sale (POS) system using a tablet and a Bluetooth receipt printer. The printer pairs but prints garbled text. The tablet is running a custom POS app. What is the most likely cause?
⚠ Common exam trap
The 220-1201 exam often tests the distinction between pairing success and functional data transfer, trapping candidates who assume a successful Bluetooth connection guarantees correct operation, when in fact the correct profile or driver is required for the device to interpret the data properly.
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
✓
The tablet is using the wrong Bluetooth profile or driver for the printer.
The most likely cause is that the tablet is using the wrong Bluetooth profile or driver for the printer. Bluetooth printers typically use the Serial Port Profile (SPP) or Hardcopy Cable Replacement Profile (HCRP) to receive print data. If the tablet's POS app or Bluetooth stack is sending data using a different profile (e.g., A2DP for audio or HID for input), the printer will receive garbled or uninterpretable data, even though the devices are paired.
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 printer is out of paper.
Why it's wrong here
When a printer is out of paper, it typically ceases printing operations entirely and often displays a specific error message, either on its own control panel or through the connected device's interface. It would not attempt to print and produce garbled text, as the physical medium for printing is absent. Garbled text indicates that data is being received and processed, albeit incorrectly, rather than a lack of consumables.
- ✗
The Bluetooth signal is weak.
Why it's wrong here
A weak Bluetooth signal primarily manifests as intermittent connectivity, dropped data packets, or complete disconnections between devices. This would typically result in incomplete print jobs, missing characters, or a failure to print at all, rather than consistently producing unintelligible characters. Consistent garbled text suggests that the data is reliably reaching the printer but is being misinterpreted at a higher protocol or driver level, not lost due to signal integrity issues.
- ✓
The tablet is using the wrong Bluetooth profile or driver for the printer.
Why this is correct
This is the correct answer because printers, especially thermal POS printers, rely on specific command languages like ESC/POS to interpret print commands, character sets, and formatting. If the tablet uses a generic Bluetooth profile (e.g., Serial Port Profile) without the correct printer-specific driver, it might send raw ASCII text or improperly formatted data. The printer then attempts to interpret this non-standard input as its native command language, resulting in seemingly random or 'garbled' characters as it misinterprets byte sequences for commands and characters.
- ✗
The printer's battery is low.
Why it's wrong here
A low battery in a mobile printer typically leads to performance degradation, slow operation, intermittent power loss, or an eventual complete shutdown. While erratic behavior might occur, consistent garbled text is a strong indicator of a software or communication protocol mismatch, where the data itself is being misinterpreted, rather than a power supply issue affecting the printer's ability to process data correctly. Power issues usually affect the device's operational stability, not the interpretation of correctly received data.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.