DA0-002 Data Concepts and Environments Practice Question
A hospital wants to analyze patient readmission rates. The data contains daily patient visits. What is the level of granularity?
⚠ Common exam trap
Test-takers frequently confuse the subject of analysis (patient readmission rates) with the actual data granularity (each row is a visit), leading candidates to incorrectly select 'Patient' instead of 'Visit'.
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
✓
Visit
The level of granularity refers to the finest detail captured in the dataset. Since the data contains daily patient visits, each record represents a single visit event, not the patient or the day itself. Therefore, 'Visit' is the correct granularity because each row corresponds to one visit occurrence.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Patient
Why it's wrong here
Incorrect. Each row is per visit, not per patient.
- ✓
Visit
Why this is correct
Correct. Each record captures one visit.
- ✗
Day
Why it's wrong here
Incorrect. Day would imply one aggregate per day, but the data has multiple visits per day.
- ✗
Hospital
Why it's wrong here
Incorrect. The data is about visits, not hospital-level aggregates.
Go deeper
Related to this question
About these practice questions
One of 986 original DA0-002 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 →
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.