COMPTIA

CompTIA DataX

DY0-001

CompTIA DataX certification validates expertise in data science, equipping professionals with skills to handle complex data sets and implement data-driven solutions. Ideal for experienced data scientists aiming to drive business growth through insightful data interpretation.

Practice Free Questions

5Domains

25Objectives

142Practice pages

654Free questions

DY0-001 free practice questions

Choose any objective and open any question page — no sign-in required.

Statistical methods

31 questions · 7 pages

Questions 1–5 6–10 11–15 16–20 21–25 26–30 31–31

Probability and modeling

31 questions · 7 pages

Questions 1–5 6–10 11–15 16–20 21–25 26–30 31–31

Linear algebra and calculus

21 questions · 5 pages

Questions 1–5 6–10 11–15 16–20 21–21

Temporal models

34 questions · 7 pages

Questions 1–5 6–10 11–15 16–20 21–25 26–30 31–34

EDA methods

24 questions · 5 pages

Questions 1–5 6–10 11–15 16–20 21–24

Data issues

28 questions · 6 pages

Questions 1–5 6–10 11–15 16–20 21–25 26–28

Data enrichment

23 questions · 5 pages

Questions 1–5 6–10 11–15 16–20 21–23

Model iteration

13 questions · 3 pages

Questions 1–5 6–10 11–13

Results communication

20 questions · 4 pages

Questions 1–5 6–10 11–15 16–20

Foundational concepts

24 questions · 5 pages

Questions 1–5 6–10 11–15 16–20 21–24

Supervised learning

31 questions · 7 pages

Questions 1–5 6–10 11–15 16–20 21–25 26–30 31–31

Tree-based learning

35 questions · 7 pages

Questions 1–5 6–10 11–15 16–20 21–25 26–30 31–35

Deep learning

24 questions · 5 pages

Questions 1–5 6–10 11–15 16–20 21–24

Unsupervised learning

27 questions · 6 pages

Questions 1–5 6–10 11–15 16–20 21–25 26–27

Business functions

23 questions · 5 pages

Questions 1–5 6–10 11–15 16–20 21–23

Data types

32 questions · 7 pages

Questions 1–5 6–10 11–15 16–20 21–25 26–30 31–32

Data ingestion

26 questions · 6 pages

Questions 1–5 6–10 11–15 16–20 21–25 26–26

Data wrangling

20 questions · 4 pages

Questions 1–5 6–10 11–15 16–20

Data science life cycle

25 questions · 5 pages

Questions 1–5 6–10 11–15 16–20 21–25

DevOps and MLOps

22 questions · 5 pages

Questions 1–5 6–10 11–15 16–20 21–22

Deployment environments

21 questions · 5 pages

Questions 1–5 6–10 11–15 16–20 21–21

Optimization

22 questions · 5 pages

Questions 1–5 6–10 11–15 16–20 21–22

NLP concepts

31 questions · 7 pages

Questions 1–5 6–10 11–15 16–20 21–25 26–30 31–31

Computer vision

28 questions · 6 pages

Questions 1–5 6–10 11–15 16–20 21–25 26–28

Other applications

38 questions · 8 pages

Questions 1–5 6–10 11–15 16–20 21–25 26–30 31–35 36–38

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Percentages reflect share of the current practice bank, not official exam weightings. Every page above is a live, crawlable practice page (25 objectives · 142 pages).

CompTIA DataX

DY0-001 free practice questions

Domain 1 · Mathematics and statistics18% of practice bank · 4 objectives · 117 questions18%

Domain 2 · Modeling, analysis, and outcomes17% of practice bank · 5 objectives · 108 questions17%

Domain 3 · Machine learning22% of practice bank · 5 objectives · 141 questions22%

Domain 4 · Operations and processes26% of practice bank · 7 objectives · 169 questions26%

Domain 5 · Specialized applications of data science18% of practice bank · 4 objectives · 119 questions18%