Data Science Intermediate Quiz 4

This quiz is designed for individuals with foundational knowledge of Data Science who are looking to test and expand their skills. It focuses on key topics such as Python programming, data analysis, machine learning, statistics, and essential concepts in artificial intelligence. The quiz consists of multiple-choice questions that cover both theoretical concepts and practical applications.

1 / 10

The process of using a model on unseen data to evaluate its performance is called:

Training

Validation

Testing

Optimization

2 / 10

Which of the following is used for feature selection in machine learning?

Recursive Feature Elimination (RFE)

Feature engineering

Data augmentation

Standardization

3 / 10

Which of the following is a key concept in Natural Language Processing (NLP)?

Tokenization

Bag of Words

Named Entity Recognition

All of the above

4 / 10

Which library is commonly used for visualizing data in Python?

Seaborn

TensorFlow

Keras

PyTorch

5 / 10

Which technique is used to reduce the dimensionality of data?

PCA (Principal Component Analysis)

K-Means Clustering

Logistic Regression

Decision Trees

6 / 10

What is the purpose of a confusion matrix?

It visualizes the features of a dataset.

It helps in identifying false positives and false negatives.

It calculates the accuracy of a model.

It selects the best features for a model.

7 / 10

Which of the following is a distance metric used in clustering algorithms?

Euclidean distance

Manhattan distance

Cosine similarity

All of the above

8 / 10

Which of the following techniques is used to avoid overfitting in models?

Increasing the model complexity

Cross-validation

Reducing the size of the training data

Ignoring irrelevant features

9 / 10

In the context of probability distributions, which of the following is true for a normal distribution?

The mean is equal to the mode.

It is skewed to the right.

It has two peaks.

It is skewed to the left.

10 / 10

Which of the following activation functions is used in neural networks?

ReLU

Sigmoid

Tanh

All of the above

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Data Science Intermediate Quiz 4

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