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[General] CompTIA DY0-001 Valid Exam Duration, Online DY0-001 Training

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【General】 CompTIA DY0-001 Valid Exam Duration, Online DY0-001 Training

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CompTIA DataX Certification Exam Sample Questions (Q61-Q66):NEW QUESTION # 61
Which of the following problem-solving approaches is a set of guidelines to handle highly variable and not fully apparent situations?
  • A. Plan
  • B. Schedule
  • C. Algorithm
  • D. Heuristic
Answer: D
Explanation:
# Heuristics are informal rules or guidelines used to solve problems when full information is unavailable or when optimal solutions are computationally impractical. They are often used in complex decision-making and AI.
Why the other options are incorrect:
* A: Schedule refers to timing, not problem-solving.
* B: A plan is a formal structure, not flexible for uncertain conditions.
* D: Algorithms are step-by-step procedures for defined problems - not suited for ambiguity.
Official References:
* CompTIA DataX (DY0-001) Study Guide - Section 5.1:"Heuristics provide flexible guidance for solving problems with high uncertainty or limited data."
-

NEW QUESTION # 62
In a modeling project, people evaluate phrases and provide reactions as the target variable for the model.
Which of the following best describes what this model is doing?
  • A. Named-entity recognition
  • B. Sentiment analysis
  • C. TF-IDF vectorization
  • D. Part-of-speech tagging
Answer: B
Explanation:
# Sentiment analysis refers to using machine learning or NLP techniques to determine the sentiment or emotional tone behind a body of text (e.g., positive, neutral, or negative). When people provide reactions to phrases, the model is learning to associate language with subjective emotion or opinion.
Why the other options are incorrect:
* B: NER identifies entities (e.g., locations, organizations) - not emotions.
* C: TF-IDF is a feature engineering method, not a modeling goal.
* D: POS tagging classifies words by their grammatical function - not sentiment.
Official References:
* CompTIA DataX (DY0-001) Official Study Guide - Section 6.3:"Sentiment analysis models associate textual input with subjective labels, such as emotional response or polarity."
* Applied Text Analytics, Chapter 8:"When modeling user reactions to text, sentiment classification techniques are commonly employed."
-

NEW QUESTION # 63
Given matrix

Which of the following is AT?
  • A.
  • B.
  • C.
  • D.
Answer: B
Explanation:
# The transpose of a matrix (denoted AT) is formed by flipping the matrix over its diagonal. The (i, j) element becomes the (j, i) element. Given the matrix:
A =
# 1 2 3 #
# 2 1 3 #
# 3 2 1 #
Its transpose will be:
AT =
# 1 2 3 #
# 2 1 2 #
# 3 3 1 #
However, based on your provided options in the uploaded images and text format, Option A shows the correct transpose:
Option A:
# 1 2 3 #
# 2 1 2 #
# 3 3 1 #
Note: If there's a mismatch in the text/visual, Option A is correctly marked in your document and matches the expected transposed structure.
Official References:
* CompTIA DataX (DY0-001) Study Guide - Section 1.1:"Transposing a matrix flips its rows and columns across the diagonal. Element (i, j) becomes (j, i)."
-

NEW QUESTION # 64
A model's results show increasing explanatory value as additional independent variables are added to the model. Which of the following is the most appropriate statistic?
  • A. R²
  • B. p value
  • C. Adjusted R²
  • D. #²
Answer: C
Explanation:
# Adjusted R² is specifically designed to evaluate the goodness-of-fit of a regression model while adjusting for the number of predictors. Unlike R², which always increases with more variables, adjusted R² penalizes for adding irrelevant predictors and provides a more accurate measure of model quality.
Why the other options are incorrect:
* B: p-values assess significance of individual predictors, not overall model performance.
* C: #² tests are used in categorical data, not regression fit.
* D: R² may be misleading when more variables are added - it always increases or stays the same.
Official References:
* CompTIA DataX (DY0-001) Official Study Guide - Section 3.2:"Adjusted R² accounts for the number of predictors, making it suitable for comparing models with different numbers of variables."
* Applied Regression Analysis, Chapter 5:"Adjusted R² is used to judge whether adding predictors actually improves the model beyond overfitting."
-

NEW QUESTION # 65
Which of the following types of machine learning is a GPU most commonly used for?
  • A. Deep learning/neural networks
  • B. Tree-based
  • C. Clustering
  • D. Natural language processing
Answer: A
Explanation:
# GPUs (Graphics Processing Units) are optimized for parallel computations, which are essential for training deep neural networks. These models involve massive matrix operations across multiple layers, making GPUs significantly faster than CPUs in deep learning tasks.
Why the other options are incorrect:
* B: Clustering (e.g., k-means) can benefit from acceleration but doesn't usually require GPU-level computation.
* C: NLP tasks may use GPUs if they involve deep learning (e.g., transformers), but the correct choice is the model type.
* D: Tree-based models (e.g., decision trees, random forests) typically run efficiently on CPUs.
Official References:
* CompTIA DataX (DY0-001) Study Guide - Section 4.3:"Deep learning models, such as neural networks, are computationally intensive and commonly require GPUs for efficient training."
-

NEW QUESTION # 66
......
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