Deep Learning - Crash Course 2023 - Gradient Descent

The video tutorial explains the process of optimizing parameters in a model using gradient descent. It begins by discussing the importance of loss functions, such as squared error loss, in guiding parameter adjustments. The tutorial then introduces gradient descent as a method to minimize loss by iteratively updating weights and biases. It delves into the concept of derivatives, explaining how they help determine the direction and magnitude of parameter updates. The video also covers the calculation of partial derivatives and the role of the learning rate in controlling the update step size. The tutorial concludes by emphasizing the importance of these concepts in improving model performance.

What is the primary goal when optimizing parameters in a model?

• To maximize the loss function

• To minimize the loss function

• To keep the loss function constant

• To ignore the loss function

Which function is used to update parameters in the gradient descent methodology?

• Linear function

• Sigmoid function

• Quadratic function

• Exponential function

What mathematical concept helps in determining the optimal values of weights and biases?

• Statistics

• Derivatives

• Probability

• Integration

What does the term 'delta W' represent in the context of gradient descent?

• The change in input values

• The change in bias with respect to weights

• The change in output values

• The change in loss with respect to weights

What is the purpose of using a learning rate in gradient descent?

• To increase the speed of convergence

• To decrease the speed of convergence

• To prevent sudden changes in parameter values

• To ensure parameters remain constant

How is the learning rate represented in the gradient descent formula?

• As a fixed value of 1

• As a variable that changes with each iteration

• As a small value, often denoted by ETA

• As a large constant

What is the effect of subtracting the derivative from the variable in gradient descent?

• It keeps the variable unchanged

• It moves the variable opposite to the gradient

• It moves the variable in the direction of the gradient

• It increases the loss function