FC0-U71 Tech Concepts and Terminology Practice Question
Which of the following is the result of the binary operation 1101 AND 1011?
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
✓
1001
AND operation: 1 AND 1 = 1, 1 AND 0 = 0, 0 AND 1 = 0, 1 AND 1 = 1. So 1101 AND 1011 = 1001 (binary).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
1111
Why it's wrong here
That would be OR, not AND.
- ✗
1011
Why it's wrong here
That's the second operand.
- ✗
1101
Why it's wrong here
That's the first operand, not the AND result.
- ✓
1001
Why this is correct
Correct result of bitwise AND.
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Same concept, more angles
5 more ways this is tested on FC0-U71
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Which of the following is the decimal equivalent of the binary number 1101?
easy- ✓ A.13
- B.10
- C.14
- D.11
Why A: Binary 1101 = 1*8 + 1*4 + 0*2 + 1*1 = 13.
Variation 2. Which of the following is the binary representation of the decimal number 10?
easy- A.1000
- ✓ B.1010
- C.1100
- D.1110
Why B: Decimal 10 in binary is 1010 (8+2). 1000 is decimal 8, 1100 is 12, 1110 is 14.
Variation 3. What is the decimal equivalent of the binary number 1101?
easy- A.15
- ✓ B.13
- C.10
- D.12
Why B: Binary 1101 = 1*8 + 1*4 + 0*2 + 1*1 = 13.
Variation 4. Which of the following is the binary representation of the decimal number 5?
easy- A.0100
- B.0011
- C.0110
- ✓ D.0101
Why D: In binary, 5 is 0101 (often written as 101). 4 in binary is 0100, 6 is 0110, and 3 is 0011.
Variation 5. A technician is converting the decimal number 255 to binary. Which binary value is correct?
medium- A.10000000
- B.11111110
- C.1111111
- ✓ D.11111111
Why D: 255 in binary is 11111111 (eight 1s).
JA
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.