Which algorithm can be used for both regression and classification tasks, and is particularly well-suited for dealing with large data sets and high-dimensional spaces?
- Gradient Boosting
- K-Means
- Naive Bayes
- Random Forest
Gradient Boosting is an algorithm that can be used for both regression and classification tasks. It's known for its robustness in handling large datasets and high-dimensional spaces, making it a versatile choice.
One of the common algorithms used to solve the multi-armed bandit problem is the ________ algorithm.
- UCB (Upper Confidence Bound)
- Q-Learning
- A* (A-Star)
- K-Means
The Upper Confidence Bound (UCB) algorithm is a common approach to solving the multi-armed bandit problem, providing a balance between exploration and exploitation.
Why is balancing exploration and exploitation crucial in reinforcement learning?
- To optimize the learning process
- To simplify the problem
- To minimize the rewards
- To increase computational efficiency
Balancing exploration and exploitation is crucial because it helps the agent learn the environment without getting stuck in suboptimal actions.
Which layer in a CNN is responsible for reducing the spatial dimensions of the input data?
- Convolutional Layer
- Pooling Layer
- Fully Connected Layer
- Activation Layer
The Pooling Layer is responsible for spatial dimension reduction. It downsamples the feature maps, reducing the amount of computation needed and retaining important information.
Ridge and Lasso are techniques used for ________ to prevent overfitting.
- Data Preprocessing
- Feature Engineering
- Hyperparameter Tuning
- Regularization
Ridge and Lasso are both regularization techniques used to prevent overfitting in machine learning. Regularization adds penalty terms to the model's loss function to discourage excessive complexity and make the model generalize better.
Which algorithm is commonly used for density estimation in a dataset, especially when modeling clusters as ellipses?
- Gaussian Mixture Model
- k-Means
- Decision Tree
- Support Vector Machine
The Gaussian Mixture Model is frequently used for density estimation. It models data as a mixture of Gaussian distributions, allowing for flexible cluster shapes, including ellipses.
The hidden layer that contains the compressed representation of the input data in an autoencoder is called the ________ layer.
- Bottleneck
- Compression
- Encoding
- Latent
The hidden layer that holds the compressed representation in an autoencoder is the 'Latent' layer, capturing essential features of the input data.
What role do the hidden states in RNNs play in terms of sequential data processing?
- Storing Information Over Time
- Managing Data Loss
- Encoding Input Features
- Updating Weights for Classification
The hidden states in RNNs play a crucial role in storing information over time. They retain memory of past inputs and contribute to the model's ability to process sequential data, making them suitable for tasks with dependencies over time.
Which of the following describes the situation when a model performs well on the training data but poorly on unseen data?
- Bias
- High Variance
- Overfitting
- Underfitting
This situation is known as overfitting, where a model learns to fit the training data too closely but fails to generalize to new, unseen data, resulting in a high error rate.
One of the challenges in DQN is that small updates to Q values can lead to significant changes in the policy, making the learning process highly ________.
- Sensitive
- Efficient
- Predictable
- Robust
The term 'sensitive' in this context refers to the fact that small changes in Q values can have a disproportionate impact on the policy, making it unstable and hard to control.