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[Hardware] Free PDF 2026 CompTIA DY0-001: CompTIA DataX Certification Exam–Reliable Test Sc

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【Hardware】 Free PDF 2026 CompTIA DY0-001: CompTIA DataX Certification Exam–Reliable Test Sc

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CompTIA DY0-001 Exam Syllabus Topics:
TopicDetails
Topic 1
  • Operations and Processes: This section of the exam measures skills of an AI
  • ML Operations Specialist and evaluates understanding of data ingestion methods, pipeline orchestration, data cleaning, and version control in the data science workflow. Candidates are expected to understand infrastructure needs for various data types and formats, manage clean code practices, and follow documentation standards. The section also explores DevOps and MLOps concepts, including continuous deployment, model performance monitoring, and deployment across environments like cloud, containers, and edge systems.
Topic 2
  • Modeling, Analysis, and Outcomes: This section of the exam measures skills of a Data Science Consultant and focuses on exploratory data analysis, feature identification, and visualization techniques to interpret object behavior and relationships. It explores data quality issues, data enrichment practices like feature engineering and transformation, and model design processes including iterations and performance assessments. Candidates are also evaluated on their ability to justify model selections through experiment outcomes and communicate insights effectively to diverse business audiences using appropriate visualization tools.
Topic 3
  • Mathematics and Statistics: This section of the exam measures skills of a Data Scientist and covers the application of various statistical techniques used in data science, such as hypothesis testing, regression metrics, and probability functions. It also evaluates understanding of statistical distributions, types of data missingness, and probability models. Candidates are expected to understand essential linear algebra and calculus concepts relevant to data manipulation and analysis, as well as compare time-based models like ARIMA and longitudinal studies used for forecasting and causal inference.
Topic 4
  • Machine Learning: This section of the exam measures skills of a Machine Learning Engineer and covers foundational ML concepts such as overfitting, feature selection, and ensemble models. It includes supervised learning algorithms, tree-based methods, and regression techniques. The domain introduces deep learning frameworks and architectures like CNNs, RNNs, and transformers, along with optimization methods. It also addresses unsupervised learning, dimensionality reduction, and clustering models, helping candidates understand the wide range of ML applications and techniques used in modern analytics.
Topic 5
  • Specialized Applications of Data Science: This section of the exam measures skills of a Senior Data Analyst and introduces advanced topics like constrained optimization, reinforcement learning, and edge computing. It covers natural language processing fundamentals such as text tokenization, embeddings, sentiment analysis, and LLMs. Candidates also explore computer vision tasks like object detection and segmentation, and are assessed on their understanding of graph theory, anomaly detection, heuristics, and multimodal machine learning, showing how data science extends across multiple domains and applications.

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CompTIA DataX Certification Exam Sample Questions (Q32-Q37):NEW QUESTION # 32
Which of the following explains back propagation?
  • A. The passage of errors backward through a neural network to update weights and biases
  • B. The passage of convolutions backward through a neural network to update weights and biases
  • C. The passage of accuracy backward through a neural network to update weights and biases
  • D. The passage of nodes backward through a neural network to update weights and biases
Answer: A
Explanation:
# Backpropagation (short for "backward propagation of errors") is the fundamental algorithm for training neural networks. It involves computing the error at the output and propagating it backward through the network to update weights and biases via gradient descent.
Why the other options are incorrect:
* A: Convolutions are specific to CNNs and are not propagated in this manner.
* B: Accuracy is an evaluation metric, not used in weight updates.
* C: Nodes are structural elements, not passed backward.
Official References:
* CompTIA DataX (DY0-001) Official Study Guide - Section 4.3:"Backpropagation passes the error backward from the output layer to the input layer to adjust weights using gradient-based optimization."
* Deep Learning Textbook, Chapter 6:"The backpropagation algorithm is essential for computing gradients of the loss function with respect to each weight."
-

NEW QUESTION # 33
A data scientist observes findings that indicate that as electrical grids in a country become more and more connected over time, the frequency of brownouts and blackouts in total decrease, and the frequency of major brownouts and blackouts increase. Which of the following distribution metrics could best be identified?
  • A. Scale axis magnitudes
  • B. Normality
  • C. Skewness
  • D. Kurtosis
Answer: D
Explanation:
# Kurtosis is a statistical measure that describes the "tailedness" or extremity of values in a distribution. The observation that smaller events decrease while extreme events increase indicates a rise in heavy tails - a textbook sign of increasing kurtosis. This reflects a distribution becoming more prone to extreme values (e.g., more impactful blackouts).
Why the other options are incorrect:
* A: "Scale axis magnitudes" is not a statistical metric but refers to plotting.
* C: Skewness measures asymmetry, not the frequency of extreme values.
* D: Normality checks whether a distribution follows the normal distribution, not its tail behavior.
Official References:
* CompTIA DataX (DY0-001) Official Study Guide - Section 1.3:"Kurtosis measures the presence of outliers and extreme values in a distribution - higher kurtosis suggests more frequent extreme events."
* Applied Statistical Analysis, Chapter 4:"Kurtosis provides insight into the likelihood of extreme deviations and is useful in risk and reliability analysis."
-

NEW QUESTION # 34
Which of the following image data augmentation techniques allows a data scientist to increase the size of a data set?
  • A. Scaling
  • B. Clipping
  • C. Masking
  • D. Cropping
Answer: D
Explanation:
# Cropping involves selecting portions of an image to create multiple training samples from one image. This technique helps increase dataset size and variability, which improves model generalization.
Why the other options are incorrect:
* A: Clipping typically refers to limiting pixel values, not augmentation.
* C: Masking hides or removes parts of an image - used more in object detection or inpainting, not to expand the dataset.
* D: Scaling changes the image size but doesn't create new samples.
Official References:
* CompTIA DataX (DY0-001) Study Guide - Section 6.3:"Cropping is a data augmentation strategy that allows for synthetic expansion of the dataset by generating multiple views."
-

NEW QUESTION # 35
A data analyst wants to use compression on an analyzed data set and send it to a new destination for further processing. Which of the following issues will most likely occur?
  • A. Operating system support will be missing.
  • B. Server CPU usage will be too high.
  • C. Library dependency will be missing.
  • D. Server memory usage will be too high.
Answer: B
Explanation:
# Compression is a CPU-intensive process because it requires encoding data into a smaller format, often involving complex algorithms. While memory use is usually moderate, CPU usage can spike significantly, especially during real-time compression or large dataset processing.
Why the other options are incorrect:
* A: Library issues are possible but not the most likely issue in compression.
* C: Most operating systems support common compression formats (e.g., .zip, .gz).
* D: Memory usage is generally lower than CPU usage during compression.
Official References:
* CompTIA DataX (DY0-001) Official Study Guide - Section 5.4:"Compression is compute-intensive and may result in increased CPU utilization, particularly on shared servers or during large batch processes."
* Cloud Data Engineering Guide, Chapter 9:"High CPU usage is a common bottleneck in data compression and decompression processes, especially at scale."
-

NEW QUESTION # 36
A data scientist trained a model for departments to share. The departments must access the model using HTTP requests. Which of the following approaches is appropriate?
  • A. Deploy containers.
  • B. Utilize distributed computing.
  • C. Create an endpoint.
  • D. Use the File Transfer Protocol.
Answer: C
Explanation:
# Creating an endpoint allows other systems or departments to access the trained model via HTTP requests.
This typically involves exposing the model as a RESTful API, allowing it to be queried by web-based systems.
Why the other options are incorrect:
* A: Distributed computing refers to computation, not access over HTTP.
* B: Containers are useful for deployment, but the endpoint enables access.
* D: FTP is used for file transfer, not model inference via HTTP.
Official References:
* CompTIA DataX (DY0-001) Official Study Guide - Section 5.4:"Endpoints are used to expose models to external consumers over HTTP protocols, often using REST APIs."
* ML Deployment Best Practices, Chapter 3:"RESTful endpoints provide real-time access to model predictions and are key for multi-team collaboration."

NEW QUESTION # 37
......
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