Machine Learning MCQ - How to fix the problem of overfitting in neural network

Multiple choices questions in Machine learning. Interview questions on machine learning, quiz questions for data scientist answers explained, How to fix the problem of overfitting in neural network? How does regularization prevent overfitting? How does early stopping prevent overfitting? How does "decrease in model complexity" prevent overfitting? List various methods to fix overfitting in neural network.

Machine Learning MCQ - List of various methods to fix overfitting problem in neural network

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1. Suppose you have a neural network that is overfitting to the training data. Which of the following can fix the situation?

a) Regularization

b) Decrease model complexity

c) Train less/early stopping

d) All of the above

Answer: (d) All of the above Overfitting happens when your model is too complicated to generalize for new data. When your model fits your training data perfectly, it is unlikely to fit new data (test data) well.   How does regularization help in fixing the overfitting problem? Regularization helps to choose preferred model complexity, so that model is better at predicting. Regularization is nothing but adding a penalty term to the objective function and control the model complexity using that penalty term. Regularization parameter (lambda) penalizes all the parameters except intercept so that model generalizes the data and won’t overfit.   How does “decreasing the model complexity” help in overcoming overfitting problem? A model with a high degree of complexity may be able to capture more variations in the data, but it will also be more difficult to train and may be more prone to overfitting. On the other hand, a model with a low degree of complexity may be easier to train but may not be able to capture all the relevant information in the data. [Refer here for more]   How does “early stopping” prevent overfitting? Early stopping is used to stop overfitting on training data. When a model is too eagerly learning noise, the validation loss may start to increase during training. To prevent this, we can simply stop the training whenever it seems the validation loss isn't decreasing anymore. Once we detect that the validation loss is starting to rise again, we can reset the weights back to where the minimum occurred. This ensures that the model won't continue to learn noise and overfit the data. [Refer here for more]

 

  

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What is overfitting in neural network?

How to prevent overfitting in neural network in training data?

How does "early stopping" help in preventing overfitting problem?

How does "decrease in model complexity" help fighting overfitting problme in neural net?

How does "regularization" prevent overfitting in training data?

Why overfitting is considered as a serious problem?

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