FC0-U71 Tech Concepts and Terminology Practice Question
An IT specialist is explaining ASCII and Unicode to a trainee. Which statement accurately describes a difference between ASCII and Unicode?
⚠ Common exam trap
FC0-U71 often tests the misconception that Unicode is always 16-bit, confusing the encoding with the character set, and that ASCII is 8-bit when standard ASCII is 7-bit.
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
✓
Unicode can represent characters from multiple languages, while ASCII is limited to English.
Unicode is designed to represent characters from virtually all writing systems, including non-Latin scripts, emojis, and symbols, whereas ASCII is limited to 128 (or 256 in extended versions) characters primarily for English and Western European languages. This is the fundamental difference in character repertoire. The other options contain factual errors about bit widths and encoding schemes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
ASCII uses 8 bits per character and supports 256 characters.
Why it's wrong here
Standard ASCII is a 7-bit encoding of 128 characters; the 8-bit, 256-character form is extended ASCII, a separate family of code pages. Unicode assigns code points across far more than 256 characters. Extended ASCII is the correct answer when the question asks specifically about 8-bit single-byte encodings.
- ✗
Unicode uses 16 bits per character, while ASCII uses 7 bits.
Why it's wrong here
Unicode is not fixed at 16 bits; UTF-16 uses 16-bit code units but UTF-8 and UTF-32 differ, and code points extend beyond the BMP. ASCII is 7-bit, which this option states correctly, but the Unicode half is false. UTF-16 is the right answer only when the question asks about that specific encoding form.
- ✗
ASCII is a variable-width encoding, while Unicode uses a fixed width.
Why it's wrong here
ASCII is fixed-width (7 or 8 bits per character), so the option inverts the actual distinction; Unicode's UTF-8 and UTF-16 encodings are variable-width. It tempts because Unicode's large code space and multi-byte forms invite the assumption that ASCII must be the flexible one, but ASCII's single-byte design is precisely its limitation.
- ✓
Unicode can represent characters from multiple languages, while ASCII is limited to English.
Why this is correct
ASCII uses a 7-bit encoding covering 128 characters, essentially the English alphabet, digits and control codes. Unicode assigns a unique code point to characters across virtually all writing systems, so it represents multiple languages while ASCII remains limited to English.
About these practice questions
Courseiva writes every FC0-U71 question from scratch — 988 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
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.