CompTIADataX
Domain 1Objective 3
Linear Algebra and Calculus DY0-001 Practice Questions (Page 1)
Part of the Mathematics and statistics domain, which accounts for 17% of the DY0-001 exam. CompTIA does not publish an official question count, but from its 165-minute exam (~65–110 total, ~11–19 in this domain), expect 3–5 from this objective — we provide 21 practice questions to prepare you well beyond it. (estimate)
21questions here
5free pages
7concepts
17%of the exam
Questions 1–5
- 1
A data engineer is working with a feature matrix X of shape (100, 10). They compute the rank of X and find it is 10. They then add a new feature column that is a linear combination of two existing columns. What is the rank of the new matrix X' of shape (100, 11)?
Select an answer first - 2
Which distance metric sums the absolute differences between coordinates?
Select an answer first - 3
Given matrices A = [[1, 2], [3, 4]] and B = [[5, 6], [7, 8]], what is A + B?
Select an answer first - 4
A data scientist is analyzing a transition matrix for a Markov chain representing user behavior on a website. The matrix is P = [[0.7, 0.3], [0.2, 0.8]]. They want to find the steady-state distribution, which is the eigenvector corresponding to the eigenvalue of 1. What is the steady-state distribution?
Select an answer first - 5
What is the Euclidean distance between the points (1, 2) and (4, 6)?
Select an answer first
Finished these 5 questions?
Review the revealed explanations, or continue through the curriculum.
Free Basic Practice is a study aid with revealable answers — not a scored exam. Examers.io is independent and not affiliated with or endorsed by CompTIA. “DY0-001” is a trademark of its owner, used for identification only.