LATEST DY0-001 TEST PREPARATION & DY0-001 PASS4SURE STUDY MATERIALS

Latest DY0-001 Test Preparation & DY0-001 Pass4sure Study Materials

Latest DY0-001 Test Preparation & DY0-001 Pass4sure Study Materials

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CompTIA DataX Certification Exam Sample Questions (Q47-Q52):

NEW QUESTION # 47
Which of the following distance metrics for KNN is best described as a straight line?

  • A. Euclidean
  • B. Cosine
  • C. Manhattan
  • D. Radial

Answer: A

Explanation:
# Euclidean distance is the most intuitive distance metric. It measures the shortest "straight-line" distance between two points in Euclidean space. This is typically used in KNN and clustering when features are continuous and appropriately scaled.
Why the other options are incorrect:
* A: "Radial" isn't a standard distance metric; may refer vaguely to radial basis functions.
* C: Cosine measures the angle (orientation) between vectors - not straight-line distance.
* D: Manhattan distance sums the absolute differences across dimensions - visualized as block-like (taxicab) paths, not direct lines.
Official References:
* CompTIA DataX (DY0-001) Study Guide - Section 4.4:"Euclidean distance is the default metric in KNN for measuring straight-line proximity in feature space."
* Data Mining Techniques, Chapter 3:"Euclidean distance represents the shortest path between two points and is widely used in distance-based learning algorithms."
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NEW QUESTION # 48
Which of the following is the naive assumption in Bayes' rule?

  • A. Independence
  • B. Uniform distribution
  • C. Homoskedasticity
  • D. Normal distribution

Answer: A

Explanation:
# In the context of Naive Bayes classifiers, the "naive" assumption refers to the conditional independence of features given the class label. That is, the model assumes each feature contributes independently to the probability of the output class, which simplifies the computation of probabilities.
Why the other options are incorrect:
* A: Normal distribution is often assumed for continuous variables, but it's not the naive assumption in Bayes' rule.
* C: Uniform distribution refers to equal probability across outcomes, not used here.
* D: Homoskedasticity is related to constant variance in regression, not Bayesian classification.
Official References:
* CompTIA DataX (DY0-001) Study Guide - Section 4.1:"Naive Bayes assumes all features are conditionally independent given the target class, which allows for efficient computation."
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NEW QUESTION # 49
Which of the following layer sets includes the minimum three layers required to constitute an artificial neural network?

  • A. An input layer, a convolutional layer, and a hidden layer
  • B. An input layer, a hidden layer, and an output layer
  • C. An input layer, a pooling layer, and an output layer
  • D. An input layer, a dropout layer, and a hidden layer

Answer: B

Explanation:
# A basic artificial neural network (ANN) consists of:
* An input layer to receive data
* At least one hidden layer to process the data
* An output layer to produce predictions
These three layers form the minimal architecture required for learning and transformation.
Why the other options are incorrect:
* A: Pooling layers are used in CNNs, not core ANN structure.
* B: Convolutional layers are specific to CNNs.
* D: Dropout is a regularization technique, not a required component.
Official References:
* CompTIA DataX (DY0-001) Study Guide - Section 4.3:"ANNs must include an input layer, hidden layer(s), and an output layer to form a complete learning structure."
* Deep Learning Fundamentals, Chapter 3:"At a minimum, a neural network includes input, hidden, and output layers to process and propagate data."
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NEW QUESTION # 50
Which of the following best describes the minimization of the residual term in a LASSO linear regression?

  • A. 0
  • B. e²
  • C. |e|
  • D. e

Answer: B

Explanation:
# LASSO (Least Absolute Shrinkage and Selection Operator) regression minimizes the squared residuals (e²), just like OLS, but adds an L1 penalty to encourage sparsity in the coefficients. Thus, the residual component minimized is still the sum of squared errors.
Why the other options are incorrect:
* A: |e| is absolute error, not used in standard LASSO objective.
* B: e is the error term, but minimization applies to its squared version.
* C: Minimizing to exactly 0 is idealistic but not realistic.
Official References:
* CompTIA DataX (DY0-001) Study Guide - Section 3.3:"LASSO minimizes squared errors with an additional L1 regularization term."
* Elements of Statistical Learning, Chapter 6:"LASSO regression uses the same residual sum of squares (e²) as OLS for error measurement, with an added constraint."
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NEW QUESTION # 51
Which of the following techniques enables automation and iteration of code releases?

  • A. Markdown
  • B. CI/CD
  • C. Virtualization
  • D. Code isolation

Answer: B

Explanation:
# CI/CD (Continuous Integration / Continuous Deployment) is a DevOps methodology that automates the building, testing, and deployment of code. It allows teams to iteratively release updates and improvements in a reliable and scalable manner.
Why the other options are incorrect:
* A: Virtualization provides environment emulation but doesn't manage code releases.
* B: Markdown is a documentation tool - unrelated to deployment automation.
* C: Code isolation refers to modular programming, not automation pipelines.
Official References:
* CompTIA DataX (DY0-001) Official Study Guide - Section 5.3:"CI/CD pipelines streamline model deployment through automation, allowing continuous integration and delivery of updates."
* DevOps for Data Science, Chapter 4:"CI/CD supports fast and reliable code iterations by automatically testing and deploying to production environments."
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NEW QUESTION # 52
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