NBA shot clock vs game clock
Understand why basketball has two clocks and why a reset does not mean time was added to the game.
Two clocks answer different questions
The game clock tracks time remaining in the period. The shot clock limits the time allowed for a possession to produce a qualifying attempt under the NBA rules. A change on one clock does not automatically change the other.
A hypothetical display of 4:20 on the game clock and eight on the shot clock means there is more period time than possession time. The offence cannot simply hold the ball for the full four minutes.
A shot is more than a throw toward the basket
Under NBA Rule7, an attempt must meet the rule's requirements, including leaving the player's hand before the shot-clock period expires and then touching the rim or entering the basket. A release before the buzzer is not by itself the whole test.
Shot-clock resets depend on the event and the applicable rule. Do not assume every whistle restores a full new possession period. Likewise, an offensive rebound and a change of possession need not produce identical clock behaviour.
Read the reset in context
If the shot clock jumps while the game clock stays nearly unchanged, look for the preceding event. The reset governs the possession, not extra time added to the period. A short remaining shot-clock number can explain why a team rushes an otherwise ordinary-looking attack.
On ScoreZaap, use the event sequence and match phase with the score. If the data feed does not expose a shot clock, do not infer an exact value from the game clock. This is an NBA explainer, not a promise that every basketball league uses identical reset rules or that a live feed includes every timing field.