DA0-002 Data Acquisition and Preparation Practice Question
A logistics company receives GPS tracking data from fleet vehicles at 1-second intervals via a cellular network. The data is used to optimize routes and monitor driver behavior. Recently, the data acquisition system has been missing updates for some vehicles when they pass through tunnels or remote areas. The data team notices gaps during these periods. The company needs a solution to ensure near-real-time data continuity. What should they do?
⚠ Common exam trap
A common mix-up: candidates confuse the data source (GPS) with the transmission method, thinking satellite GPS solves connectivity issues, when the real problem is the cellular network's coverage gaps, not the positioning technology.
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
✓
Implement a store-and-forward mechanism that buffers data on the vehicle's onboard unit and uploads when connectivity resumes
A store-and-forward mechanism buffers GPS data locally on the vehicle's onboard unit during connectivity loss (e.g., in tunnels) and automatically uploads the backlog when cellular connectivity resumes. This ensures data continuity without requiring real-time transmission, directly addressing the intermittent connectivity issue while maintaining near-real-time updates.
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 hybrid approach that combines cellular and Wi-Fi networks
Why it's wrong here
Wi-Fi cannot reach moving vehicles in tunnels or remote areas, so combining it with cellular leaves the same coverage holes. It is tempting because hybrid connectivity sounds resilient, but the scenario needs on-device buffering and later forwarding, which survives any network outage regardless of medium.
- ✓
Implement a store-and-forward mechanism that buffers data on the vehicle's onboard unit and uploads when connectivity resumes
Why this is correct
Store-and-forward buffers readings on the onboard unit during tunnel or remote-area outages, then uploads the backlog once cellular connectivity returns. This preserves near-real-time continuity by preventing permanent data gaps, unlike simply retrying requests that fail while the vehicle remains disconnected.
- ✗
Increase the frequency of data transmission to every 0.5 seconds
Why it's wrong here
Halving the interval cannot help when the cellular link itself drops inside tunnels; buffering and store-and-forward are required, not denser sampling. It is tempting because more frequent readings sound like better continuity, but the gaps stem from lost connectivity, so extra transmissions are simply lost too.
- ✗
Switch to a satellite-based GPS system
Why it's wrong here
Satellite GPS may improve positioning but does not address data transmission through obstructed areas.
Go deeper
Related to this question
About these practice questions
Courseiva writes every DA0-002 question from scratch — 1,004 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DA0-002 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 DA0-002 exam.