Exam Professional Data Engineer topic 1 question 1 discussion

Answer is C. Bad performance of a model is either due to lack of relationship between dependent and independent variables used, or just overfit due to having used too many features and/or bad features. A: Threading parallelisation can reduce training time, but if the selected featuers are the same then the resulting performance won't have changed B: Serialization is only changing data into byte streams. This won't be useful. C: This can show which features are bad. E.g. if it is one feature causing bad performance, then the dropout method will show it, so you can remove it from the model and retrain it. D: This would become clear if the model did not fit the training data well. But the question says that the model fits the training data well, so D is not the answer.

It occurs overfitting problem. A general idea is to simplify the model. A GENERALIZATION related method should be used.

C. Dropout Methods Dropout is a regularization technique commonly used in neural networks to prevent overfitting. It helps improve the generalization of the model by randomly setting a fraction of the neurons to zero during each training iteration, which prevents the network from relying too heavily on specific neurons. This, in turn, can lead to better performance on new, unseen data.

A: Threading parallelisation can reduce training time, but if the selected featuers are the same then the resulting performance won't have changed B: Serialization is only changing data into byte streams. This won't be useful. C: This can show which features are bad. E.g. if it is one feature causing bad performance, then the dropout method will show it, so you can remove it from the model and retrain it. D: This would become clear if the model did not fit the training data well. But the question says that the model fits the training data well. So, C is the answer.

Dropout Methods are useful to prevent a TensorFlow model from overfitting

Answer is C. Dropout methods are used to mitigate overfitting. Hence, it is commonly used in training phase and it's beneficial for test-time performance.

Answer is C

Dropout is a regularization technique commonly used in model training with TensorFlow and other deep learning frameworks. It is employed to prevent overfitting, a phenomenon where a model learns to perform well on the training data but fails to generalize well to new, unseen data.

Answer is C

Dropout is a regularization method to remove random selection of fixed number of unit in a neural network layer. So pick C for this question.

becouse it is a regularization technique for reducing overfitting in neural networks by preventing complex co-adaptations on training data.

C. Dropout Methods Dropout is a regularization technique that can be used to prevent overfitting of the model to the training data. It works by randomly dropping out a certain percentage of neurons during training, which helps to reduce the complexity of the model and prevent it from memorizing the training data. This can improve the model's ability to generalize to new data and reduce the risk of poor performance when tested against new data.

answer is likely to be C, but D (dimensionality reduction) can also be used to mitigate overfitting too! Not sure which one is the correct answer.

Correct

Answer is C. We are in an over feting problem with nerual-net model. Read at least the abstract of this. https://jmlr.org/papers/volume15/srivastava14a/srivastava14a.pdf

Correct

C is the correct answer. Dropouts: are special layers that you can add to control some operations or add functionalities. If training has an issue you can take them out. In the question, it fits training but not new data, i.e., overfitting. Solution for overfitting is dropout