ACMT Storage & Memory

Question 1

Which macOS file system is used by default on APFS volumes, and what key feature does it offer over HFS+?

Accepted Answer

APFS; space sharing between volumes in the same container and native snapshot support

Answer

NTFS; better Windows compatibility

Answer

ExFAT; cross-platform support

Answer

HFS+ Extended; larger file name support

Question 2

A customer's Mac reports 'Your disk is almost full.' What is the best way to identify what is consuming the most space?

Accepted Answer

Go to Apple menu > About This Mac > Storage, or use 'du' in Terminal to identify large directories

Answer

Run Disk Utility First Aid

Answer

Restart the Mac

Answer

Reset SMC

Question 3

On modern Apple Silicon Macs, RAM is referred to as 'Unified Memory.' What makes it different from traditional RAM?

Accepted Answer

It is integrated on the SoC die, shared between CPU, GPU, and Neural Engine with higher bandwidth

Answer

It is upgradeable after purchase

Answer

It uses DDR5 modules in DIMM slots

Answer

It only stores GPU data

Question 4

What is the consequence of attempting to upgrade RAM in an Apple Silicon MacBook?

Accepted Answer

RAM is soldered onto the SoC and cannot be upgraded—it must be configured at purchase

Answer

Performance decreases temporarily

Answer

It voids only the AppleCare warranty

Answer

A firmware update is required after upgrade

Question 5

How should a technician verify the health of an NVMe SSD in a Mac before and after replacement?

Accepted Answer

Use AST 2 storage tests and check SMART data via 'diskutil info' or System Information

Answer

Check the SSD indicator light

Answer

Run Activity Monitor

Answer

Check the storage usage in Finder

Question 6

A customer reports extremely slow Mac performance. System Information shows 4GB of RAM and significant 'swap used.' What is the recommended solution?

Accepted Answer

Add more RAM (if the Mac supports it) to reduce reliance on swap space

Answer

Replace the SSD with a faster model

Answer

Reinstall macOS

Answer

Replace the logic board