FC0-U71 Infrastructure Practice Question
A user wants to upgrade their computer's RAM for better performance. Which of the following are characteristics of DDR4 and DDR5 RAM? (Select THREE).
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
✓
DDR5 operates at a lower voltage than DDR4
DDR4 and DDR5 are both types of RAM used in modern computers. DDR5 has higher data rates and uses dual channel architecture for performance. Both are notched differently and are not interchangeable.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
DDR5 operates at a lower voltage than DDR4
Why this is correct
DDR5 uses 1.1V compared to DDR4's 1.2V, improving power efficiency.
- ✓
Dual channel configuration can improve memory performance
Why this is correct
Using two sticks in dual channel increases memory bandwidth.
- ✗
DDR4 and DDR5 use the same physical slot
Why it's wrong here
They have different key notches and are not interchangeable.
- ✓
DDR5 has higher data transfer rates than DDR4
Why this is correct
DDR5 offers faster speeds than DDR4.
- ✗
DDR4 is backward compatible with DDR3 slots
Why it's wrong here
DDR4 is not backward compatible with DDR3; they have different notches.
Go deeper
Related to this question
About these practice questions
One of 988 original FC0-U71 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
2 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. A technician is building a new desktop computer for a user who needs to edit large video files. Which type of RAM should the technician recommend for dual-channel performance?
easy- A.DDR2
- ✓ B.DDR5
- C.DDR4
- D.DDR3
Why B: DDR5 is the latest generation of RAM, offering higher speeds and improved dual-channel performance over DDR4, making it suitable for demanding tasks like video editing.
Variation 2. A user wants to upgrade their desktop computer's RAM for better performance. The motherboard supports dual-channel memory. Which configuration will provide the best performance?
medium- ✓ A.Two 8 GB DDR4 modules in paired slots
- B.Three 4 GB DDR4 modules
- C.One 16 GB DDR4 module
- D.Two 8 GB DDR4 modules in the same channel
Why A: Dual-channel architecture requires matching RAM modules in paired slots for increased bandwidth.
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.