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New DY0-001 Test Registration - Valid DY0-001 Test Cost

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New DY0-001 Test Registration - Valid DY0-001 Test Cost

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CompTIA DataX Certification Exam Sample Questions (Q67-Q72):NEW QUESTION # 67
Which of the following layer sets includes the minimum three layers required to constitute an artificial neural network?
  • A. An input layer, a dropout layer, and a hidden layer
  • B. An input layer, a pooling layer, and an output layer
  • C. An input layer, a convolutional layer, and a hidden layer
  • D. An input layer, a hidden layer, and an output layer
Answer: D
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."
-

NEW QUESTION # 68
A data scientist needs to determine whether product sales are impacted by other contributing factors. The client has provided the data scientist with sales and other variables in the data set.
The data scientist decides to test potential models that include other information.
INSTRUCTIONS
Part 1
Use the information provided in the table to select the appropriate regression model.
Part 2
Review the summary output and variable table to determine which variable is statistically significant.
If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.







Answer:
Explanation:
See explanation below.
Explanation:
Part 1
Linear regression.
Of the four models, linear regression has the highest R² (0.8), indicating it explains the greatest proportion of variance in sales.

Part 2
Var 4 - Net operations cost.
Net operations cost has a p-value of essentially 0 (far below 0.05), indicating it is the only additional predictor statistically significant in explaining sales. Neither inventory cost (p#0.90) nor initial investment (p#0.23) reach significance.


NEW QUESTION # 69
A data analyst is analyzing data and would like to build conceptual associations. Which of the following is the best way to accomplish this task?
  • A. POS
  • B. n-grams
  • C. TF-IDF
  • D. NER
Answer: B
Explanation:
# n-grams (bigrams, trigrams, etc.) are sequences of N words used to analyze co-occurrences and build conceptual or contextual associations between terms in natural language processing (NLP). This helps in understanding the semantic structure of language and is ideal for finding relationships between words.
Why the other options are incorrect:
* B: NER (Named Entity Recognition) identifies entities like names or dates; it doesn't focus on conceptual associations.
* C: TF-IDF scores term importance relative to documents, not associations.
* D: POS (Part of Speech) tagging identifies word roles (noun, verb, etc.), not direct associations.
Official References:
* CompTIA DataX (DY0-001) Official Study Guide - Section 6.3:"n-gram analysis is useful for discovering common patterns and associations in unstructured text data."
* Natural Language Processing with Python (NLTK Book), Chapter 3:"N-grams help capture collocations and associations between words that often co-occur, essential for understanding context."
-

NEW QUESTION # 70
The most likely concern with a one-feature, machine-learning model is high error due to:
  • A. dimensionality
  • B. bias
  • C. variance
  • D. probability
Answer: B
Explanation:
# A one-feature model is likely to be overly simplistic and may not capture the true complexity of the target variable. This leads to underfitting, which is associated with high bias - the model consistently misses the mark regardless of the data.
Why the other options are incorrect:
* B: High dimensionality is not a concern in this case - the model has too few features.
* C: Variance refers to overfitting - more common in overly complex models.
* D: Probability is a modeling technique, not a source of error.
Official References:
* CompTIA DataX (DY0-001) Official Study Guide - Section 4.2:"Models with insufficient features tend to underfit and exhibit high bias due to their inability to represent complex relationships."
* Bias-Variance Tradeoff - Data Science Textbook:"A high-bias model makes strong assumptions and is typically too simple to capture the underlying patterns in data."

NEW QUESTION # 71
A data scientist is building a proof of concept for a commercialized machine-learning model. Which of the following is the best starting point?
  • A. Model performance evaluation
  • B. Literature review
  • C. Model selection
  • D. Hyperparameter tuning
Answer: C
Explanation:
# In the proof-of-concept phase, the first practical step is model selection - identifying which modeling technique is most appropriate based on the nature of the problem, data, and business goal. Literature reviews are helpful but usually precede model experimentation.
Why the other options are incorrect:
* A: Literature review informs planning but isn't the first hands-on step.
* B: Performance evaluation comes after models are built.
* C: Hyperparameter tuning applies after a model is chosen.
Official References:
* CompTIA DataX (DY0-001) Study Guide - Section 5.1:"Model selection is a critical step during early prototyping when evaluating different algorithms for feasibility."
* CRISP-DM Framework - Modeling Phase:"Selecting candidate models is the first step in model development after understanding the data."

NEW QUESTION # 72
......
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