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220-1102 Practice Question: A non-profit organization is upgrading its…
A non-profit organization is upgrading its computers and wants to donate the old ones to a local school. The HDDs contain donor information that must be kept confidential. The organization wants the drives to be reusable. Which method should be used?
⚠ Common exam trap
A+ often tests the misconception that deleting files or using a degausser is sufficient for data confidentiality while maintaining reusability, but degaussing destroys the drive's functionality and deleting files leaves recoverable data, so candidates must recognize that only a full overwrite balances security and reuse.
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
✓
Perform a full overwrite with zeros using disk-wiping software.
Performing a full overwrite with zeros using disk-wiping software ensures that all data on the HDDs is irrecoverably destroyed while leaving the drives functional for reuse. This method meets the organization's need for confidentiality (donor information) and reusability, as it overwrites every sector of the drive, including hidden areas like the HPA and DCO, with a known pattern (e.g., zeros or random data), making data recovery infeasible with standard tools.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use a degausser to erase the drives.
Why it's wrong here
Degaussing involves exposing the hard drive to a powerful magnetic field, which scrambles the magnetic domains on the platters. While this effectively renders all data unreadable and unrecoverable, it also permanently damages the drive's internal components and magnetic media. Consequently, the drive becomes completely inoperable and cannot be reformatted or reused for donation, making it unsuitable for this scenario.
- ✗
Physically drill holes through the drive platters.
Why it's wrong here
Physically drilling holes through the drive platters causes irreversible mechanical damage to the storage media and often the read/write heads. This method ensures absolute data destruction by making the platters unreadable and the drive inoperable. However, since the goal is to donate functional computers, this extreme form of physical destruction is counterproductive as it renders the drive completely unusable.
- ✓
Perform a full overwrite with zeros using disk-wiping software.
Why this is correct
Performing a full overwrite with zeros using specialized disk-wiping software systematically writes a pattern of zeros across every sector of the hard drive. This process effectively obliterates any previous data remnants, making them unrecoverable by standard or even advanced forensic methods. Crucially, this method ensures complete data sanitization while leaving the drive fully functional and ready for reformatting and reuse by the recipient organization.
- ✗
Delete all files and empty the recycle bin.
Why it's wrong here
Simply deleting files and emptying the recycle bin only removes the pointers to the data within the operating system's file allocation table or master file table. The actual data blocks containing sensitive information remain physically present on the drive until they are explicitly overwritten by new data. Therefore, this method provides no real data sanitization and leaves the previous owner's information easily recoverable with common data recovery tools.
Go deeper
Related to this question
Learn chapter
Windows Command Line Tools
Key term
Confidentiality
Confidentiality means keeping sensitive information secret and accessible only to authorized people or systems.
Key term
Recovery
Recovery is the process of restoring systems, data, and operations after a security incident, failure, or disaster to return to normal functioning.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 220-1202 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 220-1202 exam.