If a classifier predicts the positive class perfectly but struggles with the negative class, the ________ might still be high due to the imbalance.
- AUC-ROC
- Accuracy
- F1 Score
- True Positive Rate
If a classifier predicts the positive class perfectly but struggles with the negative class, the Accuracy might still be high due to class imbalance. Accuracy can be misleading in imbalanced datasets because it doesn't account for the unequal distribution of classes. F1 Score and AUC-ROC are more robust metrics in such cases.
Which component of a GAN is responsible for generating new data samples?
- Discriminator
- Loss Function
- Optimizer
- Generator
The Generator component in a GAN is responsible for generating new data samples. It tries to create data indistinguishable from real data to deceive the Discriminator.
In the context of machine learning, what is a time series?
- A series of chronological events
- A list of sorted numbers
- A collection of images
- A data structure
A time series is a series of chronological events or data points collected or recorded at equally spaced time intervals. It's commonly used for forecasting and analysis.
You're working on a project where you need to predict the next word in a sentence based on the previous words. Which type of neural network architecture would be most appropriate for this task?
- Recurrent Neural Network (RNN)
- Convolutional Neural Network (CNN)
- Long Short-Term Memory (LSTM)
- Gated Recurrent Unit (GRU)
A Long Short-Term Memory (LSTM) is well-suited for this task because it can capture long-term dependencies in sequential data, making it effective for predicting the next word based on previous words in a sentence.
What is a common application of GANs in the field of image processing?
- Image classification.
- Style transfer.
- Sentiment analysis.
- Speech recognition.
GANs are frequently used for style transfer, a technique that changes the artistic style of an image. It's commonly employed in fields like art and design for image manipulation and transformation.
If a machine learning model inadvertently learns societal biases present in its training data, it can result in ________ outcomes.
- Biased
- Fair
- Unpredictable
- Equitable
When a model learns societal biases, it can lead to biased outcomes, reinforcing existing prejudices and discrimination. It's crucial to address and mitigate such biases for more equitable results.
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.
Gaussian Mixture Models (GMMs) are an extension of k-means clustering, but instead of assigning each data point to a single cluster, GMMs allow data points to belong to multiple clusters based on what?
- Data Point's Distance to Origin
- Probability Distribution
- Data Point's Neighbors
- Random Assignment
GMMs allow data points to belong to multiple clusters based on probability distributions, modeling uncertainty about cluster assignments.
In Policy Gradient Methods, the policy is usually parameterized by ________ and the gradient is taken with respect to these parameters.
- Neural Networks
- Q-values
- State-Action Pairs
- Rewards
In Policy Gradient Methods, the policy is often parameterized by neural networks. These networks determine the probability distribution of actions.