FC0-U71 Tech Concepts and Terminology Practice Question
A computer has 8 GB of RAM. If the operating system and applications are using 3.2 GB, how much RAM is available for other processes?
⚠ Common exam trap
FC0-U71 often tests basic arithmetic under time pressure — the trap is misreading 'available' as 'used' (picking D) or performing addition instead of subtraction (picking B).
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
✓
4.8 GB
Available RAM is total RAM minus RAM in use: 8 GB − 3.2 GB = 4.8 GB. This is a straightforward subtraction problem testing basic memory capacity arithmetic.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
4.8 GB
Why this is correct
Subtracting the 3.2 GB consumed by the operating system and applications from the installed 8 GB leaves 4.8 GB free. This satisfies the stem's constraint of calculating remaining RAM available for other processes, since RAM is a shared finite resource.
- ✗
11.2 GB
Why it's wrong here
Adding 8 GB total to 3.2 GB used yields 11.2 GB, which exceeds installed memory; available RAM is found by subtracting usage from capacity. It is tempting because the numbers 8 and 3.2 appear in the stem, but addition answers a different question about combined totals.
- ✗
5.8 GB
Why it's wrong here
Subtracting 3.2 from 8 gives 4.8 GB, not 5.8 GB; the arithmetic is simply wrong. It is tempting because it mimics the correct subtraction operation, but a single-digit error in the ones column produces a value that does not match the actual remaining memory.
- ✗
3.2 GB
Why it's wrong here
3.2 GB is the amount already consumed by the OS and applications, not what remains free. It is tempting because it is a figure stated directly in the stem, but available memory requires subtracting that usage from the 8 GB total, giving 4.8 GB.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official CompTIA exam blueprint
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.