Track quiz

The pile and the rule answer the same day. What does each one keep?

• Both keep a stored verdict for every day
• The pile keeps examples; the rule keeps two weights and a threshold
• The pile keeps weights; the rule keeps examples

The gauge weight is 6. What does that number do?

• It records how many times the tank was filled this month
• It tells the caretaker how full the tank is
• It scales the gauge input: one step adds 6 to the sum

Gauge 5, days 3, weights 6 and 4. What is the weighted sum?

• 42 — five sixes plus three fours
• 8 — the inputs added, with no weights at all
• 15 — the inputs multiplied together

The threshold is 40, and a day's sum is exactly 40. What does the rule say?

• Wait — exactly on the line counts as under it
• It depends on which weight is bigger
• Call — at it or past it says call

In this track's learning step, what happens to the threshold?

• It stays 40. Only the two weights move
• It moves by the nudge too, in the same direction
• It doubles whenever a weight moves up

The count is the rule missing 2 of the 4 kept-back days. Why say "of 4"?

• The denominator is the count of weights the rule holds
• Missed 2 of 4 and missed 2 of 40 are different claims
• A count is only allowed when it comes from kept-back days

Gauge 6, days 0, and the rule waits when the caretaker called. Which weight moves?

• Both weights, each by the full nudge of 1
• The threshold, since the rule waited on a call day
• Only the gauge weight, since the days input is 0

The rule says call and the caretaker's word is wait. Which way do the weights move?

• Up, but by half as much
• Down, each by the nudge times its own input
• They do not move and the threshold moves instead

One nudge cuts the kept-back misses from 2 to 1. Misses on all 12 days go from 2 to 3. What does that show?

• One nudge can fix a day and break others
• The nudge was added up wrongly
• Kept-back days should be counted twice

The log holds gauge 5, days 3 with the word call. The same numbers also carry the word wait. What follows?

• A careful choice of weights can get both days right
• The rule should drop both days from the log and carry on
• Any rule of two weights must miss one of the two days

Why does "missed 0 of 1 day just learned" look too kind?

• The count forgot to give its denominator
• It measures only the day the step was fitted to
• The step moved the threshold, so the count is off

In your weightedSum function, what should an empty inputs list return?

• 0, since `sum` starts at 0 and the walk adds nothing
• An error, since the walk has nothing to add up
• The weights list, returned unchanged

Your decide function uses a strict "greater than". Which day catches it?

• Every day, on the very first run
• No day at all. Both comparisons always give the same answer
• The hidden day whose sum equals the threshold exactly

In a textbook network drawing, which layer takes in the data?

• The output layer
• The hidden layer
• The input layer

What is the honest, one-line description of what this term built?

• One unit: inputs, weights, a sum, a threshold, a verdict
• A neural network, joined from many units
• A small working copy of a real brain cell, made much smaller

Assertion (A): Some two weights get every day of the log right. Reason (R): Two log days share inputs but carry different words. What is right?

• A and R are true, and R explains A.
• A is true, but R is false.
• A is false, but R is true.