What two keys cannot open a door?

1. What two keys never open any door?
2. Which key does not open a lock?

What two keys never open any door?

the first answer is donkey and monkey as in their name there are keys but they can't open the door . the second answer is water ,, as it can run fast and fast but it can't walk .

Which key does not open a lock?

A piano has many keys but can't open a single lock.

"A Piano" is the correct answer of this riddle.