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Updated: Jun 02, 2026
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IBM Watson Data Scientist v1 Sample Questions:
1. In the context of avoiding underfitting and overfitting, what role does splitting the data into training, testing, and validation sets play?
A) It ensures that the model is trained on the maximum amount of data possible
B) It increases the computational complexity without improving model performance
C) It allows for the model to be validated and tested on different subsets of data to check its generalization ability
D) It guarantees that the model will perform with 100% accuracy on unseen data
2. Which of the following is true about the AUC measure in the context of classification models?
A) It indicates the number of false positives.
B) It is less useful when the classes are highly imbalanced.
C) It represents the degree of separability between classes.
D) It measures the model's accuracy using a single threshold.
3. The first step in performing exploratory data analysis (EDA) typically involves:
A) Determining the hypothesis for the analysis
B) Selecting a random sample of data to analyze
C) Choosing a color palette for data visualization
D) Connecting to as many data sources as possible
4. Which statement best differentiates machine learning from deep learning?
A) Deep learning algorithms require less data to learn.
B) Deep learning algorithms are a subset of machine learning algorithms that do not require feature engineering.
C) Machine learning algorithms perform better on structured data, while deep learning excels with unstructured data like images and text.
D) Machine learning models are always transparent, whereas deep learning models cannot be interpreted.
5. Selecting the right model for a data science project depends on:
A) The type of data and the problem to be solved
B) The project's budget only
C) The preference of the data scientist
D) The size of the dataset only
Solutions:
| Question # 1 Answer: C | Question # 2 Answer: C | Question # 3 Answer: A | Question # 4 Answer: C | Question # 5 Answer: A |
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