DS0-001 Data Querying And Analysis Practice Question
When working with time-series data, what does a 'lag' feature represent in an analysis?
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
✓
The value of a variable from a previous period
A lag feature represents the value of a variable at a previous time step, which is useful for trend analysis.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The time taken to query the data
Why it's wrong here
This refers to system performance, not the data property.
- ✗
The difference between two time stamps
Why it's wrong here
This is a time interval or duration.
- ✓
The value of a variable from a previous period
Why this is correct
Lags are used to compare current values with past values.
- ✗
The sampling rate of the sensors
Why it's wrong here
This is the frequency of data collection.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official CompTIA exam blueprint
This DS0-001 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 DS0-001 exam.