TF1 C2W3 assignment not hitting 99.9% until after 42 epochs

Course Q&A TensorFlow Developer Professional Convolutional Neural Networks in TensorFlow
1

The inline text for this lab states:

The training should have stopped after less than 10 epochs and it should have reached an accuracy over 99,9% (firing the callback)."

However, this did not occur for me despite all of my upstream code blocks seeming to pass with perfect scores. My Model hit 99.3% accuracy on the training set after the 10th epoch (and validation accuracy hit 100.0% with 0 loss after the 4th epoch) so the callback wasn’t triggering.

The training accuracy bounced around between 98% and 99.8% from the 10th epoch onward until it finally (randomly?) hit 100% on the 42nd epoch. The 42nd epoch is much later than the 10th epoch indicated in the inline text. Is this expected behavior? Does the discrepancy indicate a hidden bug in my code somewhere?

Update: I completed the lab and received a score of 100/100 so I am inclined to believe there is an error in the lab text or code. Either the text should have indicated a greater number of epochs, or the code should have set the callback to trigger based on validation accuracy not training accuracy.

2

Please click my name and message your notebook as an attachment.

3

The text you’ve highlighted in the post comes from course 2 week 3 assignment notebook (please fix the topic title).

There’s no limit mentioned on the number of epochs for course 2 week 2 assignment. This is the passing criteria:

To pass this assignment, your model should achieve a training and validation accuracy of at least 80% and the final testing accuracy should be either higher than the training one or have a 5% difference at maximum.

5

FYI for anyone following: the above comment from a Mentor refers to a previous version of this post which incorrectly referred to the C2W2 lab. The original post has been updated to correctly refer to the C2W3 lab.

6

The staff have been informed about this now.