CompTIA A+ · Domain 1 · 13% of the examCore 1 (220-1201) · Mobile Devices
10 practice questions. Tap an option to check it, or open “Show answer” for the explanation.
1. A user asks a technician to add memory to a thin laptop that has one free memory slot. Which type of module should the technician order?
Objective 1.1Show answerHide answer
Answer: B. SODIMM
Laptops use SODIMMs, the smaller memory form factor made for portable systems. A DIMM is the full-size desktop module and won't physically fit a laptop slot.
Checked by Claude Opus 5.5 (high effort) · Oct 14, 2026
2. After replacing a cracked laptop screen, a technician notices the laptop's Wi-Fi signal is much weaker than before the repair. What is the most likely cause?
Objective 1.1Show answerHide answer
Answer: D. The Wi-Fi antenna leads that run through the display lid were pinched or not reconnected
Laptop Wi-Fi antennas are usually routed around the display bezel and plug into the wireless card, so a screen swap often disturbs them. A corrupted driver isn't caused by a hardware screen swap, and it usually stops Wi-Fi entirely rather than weakening it.
Checked by Claude Opus 5.5 (high effort) · Oct 14, 2026
3. A technician has shut down a laptop that has an internal (non-removable) battery and is about to replace its SSD. What should the technician do next, before touching the drive?
Objective 1.1Show answerHide answer
Answer: A. Disconnect the internal battery's connector from the motherboard
An internal battery still supplies power to the board after shutdown, so disconnecting it prevents shorts and damage while parts are swapped. Disabling the drive in firmware doesn't remove electrical power from it.
Checked by Claude Opus 5.5 (high effort) · Oct 14, 2026
4. Which connection method lets a user pay at a checkout by holding a smartphone a few centimeters from the payment terminal?
Objective 1.2Show answerHide answer
Answer: C. Near-field communication (NFC)
NFC works over about 4 cm and is the technology behind contactless payments. Bluetooth reaches around 10 m and needs pairing, which is why it isn't used for tap-to-pay.
Checked by Claude Opus 5.5 (high effort) · Oct 14, 2026
5. A sales rep's hotel has no Wi-Fi, but her phone has a strong 5G signal. She needs internet access on her laptop for an hour. What is the quickest solution?
Objective 1.2Show answerHide answer
Answer: B. Turn on the phone's mobile hotspot (tethering) and connect the laptop to it
A hotspot shares the phone's cellular data connection with the laptop over Wi-Fi, USB or Bluetooth. NFC only exchanges small amounts of data at very short range and can't carry an internet connection.
Checked by Claude Opus 5.5 (high effort) · Oct 14, 2026
6. Which laptop accessory simply duplicates the laptop's existing ports (USB, video and network) through a single connection, without adding expansion slots or drive bays?
Objective 1.2Show answerHide answer
Answer: A. Port replicator
A port replicator just copies the ports the laptop already has. A docking station traditionally goes further and can add capabilities such as expansion slots or drive bays.
Checked by Claude Opus 5.5 (high effort) · Oct 14, 2026
7. A user has turned on Bluetooth on her phone, but her new wireless headset doesn't appear in the list of available devices. What should she do next?
Objective 1.3Show answerHide answer
Answer: D. Put the headset into pairing (discoverable) mode
Pairing goes in order: enable Bluetooth, put the device into pairing mode, find it, enter a PIN if asked, then test. A PIN can only be entered after the device shows up in the list.
Checked by Claude Opus 5.5 (high effort) · Oct 14, 2026
8. A traveler wants to add a second carrier's data plan to her phone, which has no physical SIM tray. What does the phone use to store the carrier profile?
Objective 1.3Show answerHide answer
Answer: C. eSIM
An eSIM is an embedded, reprogrammable SIM, and a carrier profile can be downloaded to it, often by scanning a QR code. The IMEI identifies the phone hardware, not the subscriber's plan.
Checked by Claude Opus 5.5 (high effort) · Oct 14, 2026
9. A company lets staff read work email on their personal phones. Security requires a screen-lock PIN and encryption, plus the ability to wipe only company data if a phone is lost. What should IT deploy?
Objective 1.3Show answerHide answer
Answer: A. Mobile device management (MDM) with a BYOD policy
MDM enforces device policies, pushes corporate apps and can selectively wipe corporate data on BYOD devices. A VPN only encrypts network traffic and can't enforce a lock screen or wipe data.
Checked by Claude Opus 5.5 (high effort) · Oct 14, 2026
10. A user has a 5 GB monthly cellular data cap and went over it after turning on automatic photo and video backup to cloud storage. How can he keep the backups without going over the cap again?
Objective 1.3Show answerHide answer
Answer: D. Set the backup app to sync only over Wi-Fi
Limiting sync to Wi-Fi keeps the backups running without using cellular data. Location services use very little data and have nothing to do with the uploads.
Checked by Claude Opus 5.5 (high effort) · Oct 14, 2026
Original practice questions written from CompTIA’s published exam objectives, not real exam questions. CompTIA is a trademark of CompTIA, Inc.; this site isn’t affiliated with CompTIA.