Which of the following statements about computer memories is correct?

The correct option is: HDDs may experience a “head crash”.

Step-by-step Explanation:

1. Understanding Hard Disk Drive (HDD) Mechanics and "Head Crashes":
A Hard Disk Drive (HDD) is an electromechanical data storage device. It stores data magnetically on rapidly rotating platters. A tiny read/write head hovers extremely close to the platter surface, riding on a microscopic cushion of air. Because the gap between the head and the platter is incredibly small, any severe physical shock, vibration, or microscopic contaminant (like dust) can cause the head to physically touch the spinning platter. This contact damages the magnetic surface where data is recorded, rendering the drive unusable. This catastrophic failure event is specifically referred to as a "head crash". Therefore, the statement is correct.

2. Why the other options are incorrect:
• SSDs are also known as volatile memory: This is incorrect. Solid-State Drives (SSDs) are non-volatile memory devices, meaning they retain saved data even when the computer is powered off.
• HDDs do not have any moving parts: This is incorrect. HDDs rely on mechanical components, including spinning magnetic platters and a moving actuator arm. It is SSDs that contain no moving parts.
• Computers usually have more primary memory than secondary memory: This is incorrect. Secondary memory (like HDDs and SSDs) is used for long-term storage and is much larger in capacity (typically hundreds of gigabytes to several terabytes) compared to primary memory (RAM), which is typically much smaller (often 8 to 32 gigabytes).