PK0-005 Practice Question: Basics of IT Infrastructure and IT Project Management
A project manager is leading the implementation of a new enterprise resource planning (ERP) system that will be hosted in a private cloud. The project sponsor wants to ensure that the infrastructure meets the following requirements: high availability, data redundancy, and the ability to recover from a site failure. Which two components should the project manager include in the project plan? (Choose two.)
⚠ Common exam trap
The trap here is focusing on component-level redundancy, such as dual power supplies or RAID, instead of addressing the broader requirements for high availability and site recovery, which need load balancing and offsite replication.
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
✓
Load balancer
The sponsor requires high availability, data redundancy, and site failure recovery. A load balancer ensures application availability by distributing traffic across multiple servers, while offsite backup replication provides data redundancy and enables recovery if the primary site is lost. RAID 0, a UPS, and a single server with dual power supplies do not adequately address all three requirements, especially site-level recovery and data redundancy.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Single server with dual power supplies
Why it's wrong here
A single server, even with dual power supplies, remains a single point of failure. If the server fails or the site becomes unavailable, the ERP system goes down. This does not meet the high availability or site recovery requirements. Redundant power supplies only protect against power supply failure, not against server or site-level failures.
- ✓
Load balancer
Why this is correct
A load balancer distributes incoming traffic across multiple servers, which improves availability and prevents any single server from becoming a bottleneck. In a private cloud ERP deployment, a load balancer helps maintain service if one server fails, directly supporting the high availability requirement. It does not provide data redundancy or site recovery on its own, but it is a key component for resilient application delivery.
- ✓
Offsite backup replication
Why this is correct
Offsite backup replication copies data to a remote location, enabling recovery if the primary site fails. This directly addresses the site failure recovery requirement and supports data redundancy. For an ERP system, regular replication ensures that critical data is available even after a disaster. It complements other high-availability measures but is essential for disaster recovery.
- ✗
RAID 0 array
Why it's wrong here
RAID 0 stripes data across multiple disks for performance but provides no redundancy. If one disk fails, all data is lost. This contradicts the requirement for data redundancy and would increase risk in an ERP system. RAID 0 is not suitable for a project that requires high availability and fault tolerance.
- ✗
Uninterruptible power supply (UPS)
Why it's wrong here
A UPS provides short-term battery power during electrical outages, protecting equipment from sudden shutdowns. While important for availability, it does not provide data redundancy or the ability to recover from a complete site failure. It is a tactical component, not a strategic solution for the sponsor's requirements of high availability, data redundancy, and site recovery.
Quick reference
RAID Level Comparison
| RAID Level | Min Disks | Fault Tolerance | Read | Write | Usable Capacity |
|---|---|---|---|---|---|
| RAID 0 | 2 | None | Excellent | Excellent | 100% |
| RAID 1 | 2 | 1 disk | Good | Moderate | 50% |
| RAID 5 | 3 | 1 disk | Good | Moderate | 67–94% |
| RAID 6 | 4 | 2 disks | Good | Lower | 50–88% |
| RAID 10 | 4 | 1 disk per mirror | Excellent | Good | 50% |
RAID is not a backup strategy — it protects against disk failure but not against accidental deletion, ransomware, or site-level events.
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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 PK0-005 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 PK0-005 exam.