Classifier-Free Guidance Quiz

Answers and explanations appear as you take the quiz.

1. Why do diffusion models apply classifier-free guidance?
   • To strengthen how closely the output follows the conditioning prompt
   • To compress the model into a smaller size
   • To remove the text encoder entirely
   • To convert images into audio
2. How does a model learn to make unconditional predictions for classifier-free guidance?
   • By training a second separate classifier
   • By randomly dropping the conditioning during training
   • By using only black images
   • By disabling the GPU
3. What does increasing the guidance scale generally do?
   • Always improves diversity
   • Removes the prompt's influence
   • Strengthens prompt adherence but can cause oversaturation
   • Makes the image grayscale
4. Roughly how many forward passes per denoising step does standard classifier-free guidance require?
   • Zero
   • Ten
   • One hundred
   • Two (one conditional, one unconditional)
5. What advantage does classifier-free guidance have over classifier guidance?
   • It needs no separately trained classifier
   • It requires more training data
   • It only works on text models
   • It eliminates the diffusion process
6. In the common classifier-free guidance formula, what does guidance scale s=0 produce?
   • The conditional prediction with extra amplification
   • The unconditional model prediction without conditioning
   • A prediction from a separately trained classifier
   • A sample with all denoising removed
7. How does classifier-free guidance combine model outputs at inference?
   • It combines two image classifiers
   • It removes the conditional prompt
   • It combines conditional and unconditional score estimates
   • It adds a learned reward model after decoding
8. What does a guidance scale of 1 generally correspond to in the common formulation?
   • The unconditional prediction only
   • A classifier-based gradient
   • A zero-noise image
   • The conditional prediction without extra guidance amplification