Question 1easymultiple choice
Full question →- A
1001
Why wrong: 1001 binary equals 9 decimal.
- B
1110
Why wrong: 1110 binary equals 14 decimal.
- C
1010
1010 binary equals 10 decimal.
- D
1100
Why wrong: 1100 binary equals 12 decimal.
Question 180 of 512
Quick Answer
The correct binary representation of decimal 10 is 1010. This result comes from the process of repeatedly dividing the number by 2 and tracking the remainders: 10 divided by 2 gives 5 with a remainder of 0, 5 divided by 2 gives 2 with a remainder of 1, 2 divided by 2 gives 1 with a remainder of 0, and 1 divided by 2 gives 0 with a remainder of 1. Reading those remainders from the last division upward yields 1010. On the CompTIA ITF+ FC0-U61 exam, this conversion tests your foundational understanding of how computers represent data using base‑2 numbering, a core objective in the “Data Types and Units” domain. A common trap is reading the remainders in the wrong order—remember to start from the bottom (the last remainder) and work up. A helpful memory tip is to think of the binary pattern 1010 as “10‑10,” which visually mirrors the original decimal number, making it easier to recall during the exam.
FC0-U61 IT Concepts and Terminology Practice Question
This FC0-U61 practice question tests your understanding of it concepts and terminology. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
What is the binary representation of the decimal number 10?
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
✓
1010
The decimal number 10 is converted to binary by dividing by 2 repeatedly: 10 ÷ 2 = 5 remainder 0, 5 ÷ 2 = 2 remainder 1, 2 ÷ 2 = 1 remainder 0, 1 ÷ 2 = 0 remainder 1. Reading the remainders from bottom to top gives 1010. This matches option C.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
1001
Why it's wrong here
1001 binary equals 9 decimal.
- ✗
1110
Why it's wrong here
1110 binary equals 14 decimal.
- ✓
1010
Why this is correct
1010 binary equals 10 decimal.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
1100
Why it's wrong here
1100 binary equals 12 decimal.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse the binary for 10 with the binary for 12 (1100) or 14 (1110) by misplacing the '1' bits, or they incorrectly convert by adding 1 to the binary for 9 (1001) instead of performing proper division.
Detailed technical explanation
How to think about this question
Binary representation uses powers of 2: 2^3=8, 2^2=4, 2^1=2, 2^0=1. For decimal 10, the bits are set for 8 and 2 (1010). This concept is fundamental to subnetting in IPv4 (e.g., /28 subnet mask 255.255.255.240 = 11110000 in binary) and to understanding how IP addresses are structured in 32-bit binary form.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the FC0-U61 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
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FAQ
Questions learners often ask
What does this FC0-U61 question test?
IT Concepts and Terminology — This question tests IT Concepts and Terminology — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: 1010 — The decimal number 10 is converted to binary by dividing by 2 repeatedly: 10 ÷ 2 = 5 remainder 0, 5 ÷ 2 = 2 remainder 1, 2 ÷ 2 = 1 remainder 0, 1 ÷ 2 = 0 remainder 1. Reading the remainders from bottom to top gives 1010. This matches option C.
What should I do if I get this FC0-U61 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 25, 2026
This FC0-U61 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-U61 exam.
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