FC0-U71 Tech Concepts and Terminology Practice Question
A technician is converting the decimal number 255 to binary. Which binary value is correct?
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
✓
11111111
255 in binary is 11111111 (eight 1s).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
10000000
Why it's wrong here
10000000 is 128 decimal.
- ✗
11111110
Why it's wrong here
11111110 is 254 decimal.
- ✗
1111111
Why it's wrong here
1111111 is 127 decimal (missing one bit).
- ✓
11111111
Why this is correct
Correct: 11111111 equals 255 decimal.
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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.