This is a test cartridge that Nintendo Service Centers used to diagnose problems with an NES. Zelda uses every button on the controller (and buttons from the second controller too), can test a system's screen refresh, reset function, and is very sensitive to to the 2A03 processor being correct.
Zelda 1 is still regularly used to measure the worth of Famiclones and NESclones today; Even if they claim Zelda will work, NOAC clones will display various graphical garbage and have incorrect sound. Only complete clone systems (cloned exact hardware) won't have this problem.
As well, Playchoice 10 Arcade Machines had yellow cartridges as did Sharp C1 TV/Famicom hybrid, but Zelda was never among games made for those systems.