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| Certification Vendor: | CompTIA |
|---|---|
| Exam Name: | CompTIA DataAI Certification Exam |
| Exam Number: | DY0-001 |
| Exam Format: | Multiple Choice, Performance-Based |
| Real Exam Qty: | Up to 90 |
| Available Languages: | English, Japanese |
| Exam Duration: | 165 minutes |
| Certificate Validity Period: | Usually 3 years |
| Related Certifications: | CompTIA DataAI (formerly DataX) |
| Exam Price: | $529 USD |
| Passing Score: | Pass/Fail (No scaled score) |
| Sample Questions: | CompTIA DY0-001 Sample Questions |
| Exam Way: | Available at Pearson VUE testing centers or via online proctoring (OnVUE). |
| Pre Condition: | 5+ years of experience in data science or a similar role recommended. |
| Official Syllabus URL: | https://www.comptia.org/en-us/certifications/dataai |
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質問 # 12
An analyst wants to show how the component pieces of a company's business units contribute to the company's overall revenue. Which of the following should the analyst use to best demonstrate this breakdown?
正解:C
解説:
# A Sankey diagram is ideal for illustrating flow-based relationships, such as how different units or sources contribute to a total. It's especially effective for showing proportions, hierarchy, and decomposition - such as revenue contribution by business units.
Why the other options are incorrect:
* A: Box plots show distributions and spread - not contributions or breakdowns.
* C: Scatter plot matrix explores relationships between numeric variables, not part-to-whole relationships.
* D: Residual charts are diagnostic tools for regression - not for revenue visualization.
Official References:
* CompTIA DataX (DY0-001) Official Study Guide - Section 5.5:"Sankey diagrams are useful for visualizing contributions, flows, and proportional allocations across categories."
* Data Visualization Best Practices, Chapter 7:"Sankey charts are preferred when tracking contributions from multiple inputs to a unified output."
質問 # 13
A data scientist wants to digitize historical hard copies of documents. Which of the following is the best method for this task?
正解:D
解説:
# Optical Character Recognition (OCR) is the process of converting scanned images or hard copy text into machine-encoded text. It is the standard technique for digitizing printed or handwritten content.
Why the other options are incorrect:
* A: Word2vec is for generating word embeddings from digital text.
* C: Latent Semantic Analysis analyzes semantic structure of existing digital documents.
* D: Semantic segmentation is used in image processing for pixel-wise classification - not text extraction.
Official References:
* CompTIA DataX (DY0-001) Official Study Guide - Section 6.3:"OCR converts scanned physical documents into text files that can be searched, analyzed, or stored digitally."
* Practical NLP Applications, Chapter 2:"OCR is a prerequisite for turning printed or written material into structured data suitable for text analytics."
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質問 # 14
A data scientist has built an image recognition model that distinguishes cars from trucks. The data scientist now wants to measure the rate at which the model correctly identifies a car as a car versus when it misidentifies a truck as a car. Which of the following would best convey this information?
正解:C
解説:
# A confusion matrix gives a detailed view of a classification model's performance, including true positives, false positives, true negatives, and false negatives. It's the best tool for examining model accuracy and misclassification between specific classes - like mislabeling trucks as cars.
Why the other options are incorrect:
* B: AUC/ROC gives a broader performance summary but not individual class misclassifications.
* C: Box plots show distributions, not classification accuracy.
* D: Correlation plots show relationships between variables - not confusion results.
Official References:
* CompTIA DataX (DY0-001) Study Guide - Section 4.3:"Confusion matrices enable detailed analysis of classification performance and misclassification rates."
* Machine Learning Textbook, Chapter 5:"For evaluating how models classify specific classes, confusion matrices are the most direct and interpretable tool."
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質問 # 15
Which of the following is a classic example of a constrained optimization problem?
正解:D
解説:
# The Traveling Salesman Problem (TSP) is a classic example of a constrained optimization problem. The goal is to find the shortest possible route that visits a set of locations once and returns to the origin point - under constraints such as distance, order, and time.
Why the other options are incorrect:
* A: The cold start problem is related to recommender systems, not optimization.
* C: Calculating a local maximum is part of optimization but not necessarily constrained.
* D: Gradient descent is an optimization method, but not itself a problem with constraints.
Official References:
* CompTIA DataX (DY0-001) Official Study Guide - Section 3.4:"Constrained optimization involves solving problems under defined limitations - e.g., distance or time constraints in routing."
* Optimization Techniques in Data Science, Chapter 6:"TSP is a benchmark in combinatorial optimization, representing a multi-variable problem with strict constraints."
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質問 # 16
Which of the following JOINS would generate the largest amount of data?
正解:A
解説:
A CROSS JOIN produces the Cartesian product of the two tables (every row from the first paired with every row from the second), yielding far more rows than any of the other join types.
質問 # 17
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