Question

Two pulses are moving along a string. One pulse is moving to the right and the second is moving to the left. Both pulses reach point X at the same instant.

An illustration of a triangular trough traveling right and the same size and shape crest traveling left both toward point x. They are equidistant from x.
Will there be an instance in which the wave interference is at the same level as point X?

No, the interfering waves will always be above X.
No, the interfering waves will always fall below X.
Yes, the overlap will occur during the slope of the waves.
Yes, the overlap will occur when the first wave hits point X.

Answer 1

Yes — the overlap occurs when the pulses reach X at the same time (they cancel). Because the crest and trough have equal amplitude and meet at X simultaneously, they interfere destructively and the net displacement at X is momentarily the equilibrium level.