Which elements make up a digital system?

Question

BlackTom AI · Accepted Answer

Digital systems are built from physical devices (hardware) and the programs or data that run on them (software).

1) Relevant knowledge points and concepts
- Hardware: the tangible components (CPU, memory, storage, input/output devices, and the electrical circuits on boards) that implement computation and store/transfer signals.
- Software: the sets of instructions, programs, and data (operating systems, applications, firmware) that tell hardware what actions to perform.
- Binary and electrical circuits are important elements or properties (binary is the representation used; electrical circuits implement hardware), but they are not the two primary categories that together define “a digital system.”

2) Step-by-step reasoning
- A system needs physical components to perform operations and store signals → that is hardware.
- Those physical components must be directed by encoded procedures (programs, OS, applications) to perform meaningful tasks → that is software.
- Remove hardware: software has nothing to run on. Remove software: hardware cannot perform purposeful tasks beyond its raw electrical behavior. Therefore both are required together to form a functioning digital system.

3) Calculations
- Not applicable; this is conceptual rather than computational.

4) Why the correct answer is correct
- Answer d, “Hardware and software,” correctly identifies the two fundamental, complementary elements of any digital system: the physical platform (hardware) and the executable instructions/data (software). Together they form a complete working system.

5) Why the other options are incorrect
- a. “Software and instructions” is redundant; instructions are part of software, so this pair does not cover the physical hardware.
- b. “Hardware and electrical circuits” lists hardware plus a subset of hardware details (electrical circuits) but omits software, so it’s incomplete.
- c. “software and binary” pairs software with a representation format (binary), not the physical hardware required to run the software.

6) Conclusion
The correct choice is d. Hardware and software, which matches the provided answer.

Which elements make up a digital system?单项选择题

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Which best describes the relationship between hardware and software?