CompTIA A+ QUESTIONS AND ANSWERS | VERIFIED
AND WELL DETAILED ANSWERS | PLUS RATIONALES
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Domain 1: Mobile Devices (Questions 1–13)
,1. A user wants to replace a failing battery in a modern smartphone. Which type of battery is MOST commonly
used in today's mobile devices?
- A) Nickel-Cadmium (NiCd)
- B) Nickel-Metal Hydride (NiMH)
- C) Lithium-Ion (Li-Ion)
- D) Lead-Acid
Answer: C
Rationale: Lithium-Ion batteries are the standard for modern mobile devices due to their high energy density, low
weight, and lack of memory effect. NiCd and NiMH are older technologies, and lead-acid is used in
automotive/backup applications.
2. A technician is configuring email on a user's Android phone. The user wants to sync contacts and calendars.
Which protocol should the technician use?
- A) POP3
- B) IMAP
,- C) Exchange/MAPI
- D) SMTP
Answer: C
Rationale: Exchange (MAPI) supports full synchronization of email, contacts, and calendars. POP3 only
downloads email, IMAP syncs email but not natively contacts/calendars in the same way, and SMTP is only for
sending mail.
3. Which mobile connection type is used for contactless payments?
- A) Bluetooth
- B) NFC
- C) Infrared
- D) Wi-Fi
Answer: B
Rationale: NFC (Near Field Communication) operates at very short range (~4 cm) and is the standard for
contactless payments like Apple Pay and Google Pay.
, 4. A user reports their phone charges slowly. Which of the following is the MOST likely cause?
- A) The phone is in airplane mode
- B) The charging cable is damaged or low quality
- C) Bluetooth is enabled
- D) The screen brightness is too low
Answer: B
Rationale: Damaged or low-quality cables can restrict current flow, causing slow charging. Airplane mode and
low brightness would improve charging, and Bluetooth has minimal impact.
5. Which feature allows a mobile device to be located if lost?
- A) Hotspot
- B) GPS and find-my-device services
AND WELL DETAILED ANSWERS | PLUS RATIONALES
| GUARANTEED PASS | LATEST EXAM UPDATE |
EXAM PREP | STUDY GUIDE | PRACTICE TEST
Domain 1: Mobile Devices (Questions 1–13)
,1. A user wants to replace a failing battery in a modern smartphone. Which type of battery is MOST commonly
used in today's mobile devices?
- A) Nickel-Cadmium (NiCd)
- B) Nickel-Metal Hydride (NiMH)
- C) Lithium-Ion (Li-Ion)
- D) Lead-Acid
Answer: C
Rationale: Lithium-Ion batteries are the standard for modern mobile devices due to their high energy density, low
weight, and lack of memory effect. NiCd and NiMH are older technologies, and lead-acid is used in
automotive/backup applications.
2. A technician is configuring email on a user's Android phone. The user wants to sync contacts and calendars.
Which protocol should the technician use?
- A) POP3
- B) IMAP
,- C) Exchange/MAPI
- D) SMTP
Answer: C
Rationale: Exchange (MAPI) supports full synchronization of email, contacts, and calendars. POP3 only
downloads email, IMAP syncs email but not natively contacts/calendars in the same way, and SMTP is only for
sending mail.
3. Which mobile connection type is used for contactless payments?
- A) Bluetooth
- B) NFC
- C) Infrared
- D) Wi-Fi
Answer: B
Rationale: NFC (Near Field Communication) operates at very short range (~4 cm) and is the standard for
contactless payments like Apple Pay and Google Pay.
, 4. A user reports their phone charges slowly. Which of the following is the MOST likely cause?
- A) The phone is in airplane mode
- B) The charging cable is damaged or low quality
- C) Bluetooth is enabled
- D) The screen brightness is too low
Answer: B
Rationale: Damaged or low-quality cables can restrict current flow, causing slow charging. Airplane mode and
low brightness would improve charging, and Bluetooth has minimal impact.
5. Which feature allows a mobile device to be located if lost?
- A) Hotspot
- B) GPS and find-my-device services
