Review: Mobile Devices

Which storage device has no moving parts and offers faster read speeds in a laptop?

• ODD (optical disc drive)

• PSU (power supply unit)

• HDD (hard disk drive)

• SSD (solid-state drive)

Answer explanation

SSDs use flash memory with no moving parts, giving faster reads than mechanical HDDs. HDDs rely on spinning platters, which slow access times.

A technician is about to replace laptop RAM. Which precaution prevents damage to the new module?

• Disable the BIOS

• Unplug the display

• Remove the CPU

• Wear an ESD strap

Answer explanation

An ESD strap grounds the technician to prevent static from damaging sensitive components like RAM.

Which laptop feature allows a user to log in using a fingerprint?

• Smart card reader

• Biometric reader

• NFC tag scanner

• PIN entry pad

Answer explanation

Biometric readers authenticate users by physical traits like fingerprints. A PIN is knowledge-based, not biometric.

Which connector did most Apple iPhones use before USB-C adoption?

• Lightning connector

• Micro-USB connector

• USB-A connector

• Mini-USB connector

Answer explanation

Lightning was Apple's proprietary connector for iPhones before USB-C was adopted. Micro-USB was common on Android devices, not iPhones.

A user wants to share a phone's cellular data with a tablet over Wi-Fi. Which feature should be enabled?

• NFC sharing mode

• Mobile hotspot

• USB tethering

• Bluetooth pairing

Answer explanation

A mobile hotspot broadcasts cellular data over Wi-Fi so nearby devices can connect wirelessly. USB tethering and Bluetooth pairing do not use Wi-Fi for sharing.

Which accessory is best suited for precise handwriting input on a tablet?

• Stylus

• Speaker

• Webcam

• Headset

Answer explanation

A stylus enables accurate pen-like input on touch screens for writing or drawing.

Which device provides full desktop expansion, including multiple displays and Ethernet, for a docked laptop?

• Port replicator unit

• KVM switch box

• Docking station

• Powered USB hub

Answer explanation

Docking stations extend full desktop functionality including video and networking. Port replicators only duplicate existing ports without adding major new capabilities.

Which wireless standard is designed for very short range contactless payments?

• Wi-Fi (802.11)

• 5G cellular

• Bluetooth LE

• NFC

Answer explanation

NFC operates within a few centimeters, making it ideal for tap-to-pay transactions. Bluetooth and Wi-Fi operate at much greater ranges.

A technician must pair a Bluetooth headset to a phone. Which step directly follows enabling the Bluetooth radio?

• Enter the device PIN

• Enable pairing mode

• Install a device driver

• Test audio playback

Answer explanation

After turning Bluetooth on, pairing mode must be enabled so devices can discover each other. PIN entry comes only after discovery is complete.

Which component inside a laptop lid is typically routed near the display hinges?

• Wi-Fi antenna wire

• M.2 SSD module

• CMOS battery cell

• SODIMM memory slot

Answer explanation

Wi-Fi antennas run through the display bezel for better signal reception and are routed past the hinges. Other components like M.2 SSDs are located on the motherboard.