60. Which component comes in two varieties—one that mechanically writes binary data onto spinning magnetic disks and one that writes data with no mechanical parts?
Answer: C
Hard drive comes in two varieties—one that mechanically writes binary data onto spinning magnetic disks and one that writes data with no mechanical parts.
A hard drive is the component that comes in both traditional mechanical forms, which use spinning magnetic disks (HDDs), and solid-state forms, which have no mechanical parts (SSDs).
A) System clock
The system clock is responsible for coordinating the timing of all components within a computer system. It does not relate to data storage or writing mechanisms, making it irrelevant to the question regarding varieties of data writing methods.
B) Expansion bus
An expansion bus is a communication system that allows additional components to connect to the motherboard. While it plays a role in data transfer, it does not involve the mechanical or non-mechanical writing of binary data, thus it is not the correct answer.
C) Hard drive
A hard drive is the correct answer as it includes both hard disk drives (HDDs), which utilize mechanical parts to write data on spinning disks, and solid-state drives (SSDs), which have no mechanical components and write data electronically. This duality directly addresses the question.
D) Motherboard
The motherboard is the main circuit board that houses the CPU, memory, and other essential components. While it facilitates communication between various parts of a computer, it does not itself write data and lacks the duality of mechanical and non-mechanical data writing methods presented in the question.
Conclusion
The hard drive is the only component that features two distinct varieties for writing binary data: the traditional HDD with mechanical parts and the modern SSD without. All other options fail to meet the criteria described in the question, solidifying the hard drive as the definitive answer.