What does the term “AI winter” refer to?

Which one term is NOT related to the Artificial Neural Networks:

You are training a medical diagnostic classification model to detect a rare deadly disease. It is important to identify as many people who actually have the disease as possible, even if it means some healthy people are incorrectly flagged. Which evaluation metric should you focus on?

Which of the following are regularization methods?

What was the initial LeNet-5 neural network use case?

What is the best approach to read last committed data without locking in RDBMS?

What will happen when this code runs?

def counter_decorator(func):
    count = 0

    def wrapper(*args, **kwargs):
        nonlocal count
        count += 1
        print(f"Call #{count}")
        return func(*args, **kwargs)

    return wrapper


@counter_decorator
def greet(name):
    print(f"Hello, {name}!")


greet("Alice")
greet("Bob")