AI0-001 AI Models and Data Engineering Practice Question
During model deployment, a data engineer notices that the model's predictions are consistently lower than expected due to a shift in the distribution of one feature between training and production. Which technique should be used to detect and quantify this shift?
⚠ Common exam trap
CompTIA often tests the distinction between performance metrics (like RMSE or confusion matrix) and distribution monitoring metrics (like PSI), trapping candidates who confuse model accuracy evaluation with data drift detection.
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
✓
Calculate the population stability index (PSI)
The Population Stability Index (PSI) is specifically designed to detect and quantify shifts in the distribution of a feature or score between two populations, such as training and production datasets. It measures the stability of the feature by comparing the proportion of observations in each bin across the two time periods, making it the correct choice for diagnosing distribution drift in model deployment.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Compute the root mean square error (RMSE)
Why it's wrong here
RMSE compares predicted vs actual values, not feature distribution shifts.
- ✓
Calculate the population stability index (PSI)
Why this is correct
PSI quantifies the degree of distribution shift, commonly used in monitoring.
- ✗
Generate a confusion matrix
Why it's wrong here
Confusion matrix evaluates classification accuracy, not feature drift.
- ✗
Perform a t-test on the means
Why it's wrong here
T-test only checks mean difference, not overall distribution shift.
About these practice questions
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This AI0-001 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 AI0-001 exam.