hardMultiple Choice
FC0-U71 Practice Question: A software developer writes code that interacts…
A software developer writes code that interacts with the operating system to access hardware. Which layer of software is being used?
⚠ Common exam trap
A common mix-up: candidates confuse 'system software' with 'application software' because they think writing code that 'accesses hardware' must be an application, but the key phrase 'interacts with the operating system' points directly to the system software layer.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
System software
System software, specifically the operating system kernel, provides the interface between application software and hardware. When a software developer writes code that interacts with the OS to access hardware, they are using system calls (e.g., Windows API, POSIX syscalls) that are part of the system software layer. This layer manages hardware resources and abstracts them for higher-level programs.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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Application software
Why it's wrong here
Application software runs in user mode and cannot touch hardware directly; it must call the operating system, which the stem's code is doing. It is tempting because the developer is writing an application, yet the layer being used to access hardware is the system software beneath it.
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Firmware
Why it's wrong here
Firmware sits below the OS, initialising hardware at boot; developer code calling OS system calls runs at the application layer, which requests services from the kernel. Firmware is tempting because it directly touches hardware, but it is not the layer a developer's program occupies when invoking OS APIs.
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System software
Why this is correct
System software, comprising the operating system and device drivers, sits directly above hardware and exposes the APIs a developer calls to access it. Application software cannot touch hardware directly, so this layer satisfies the stem's requirement for code interacting with the operating system.
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Utility software
Why it's wrong here
Utility software performs maintenance tasks such as disk defragmentation or backup, not hardware access on behalf of applications. It is tempting because utilities sit close to the operating system, but they run as discrete tools rather than providing the API layer through which code reaches hardware.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This FC0-U71 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the FC0-U71 exam.