Actually, the giant poisonous snake 5e has only one action which is known as bite and some attributes. If you would like to know about it then you should follow this article now.
Actions Of 5e giant poisonous snake
Bite: The 5e giant poisonous snake able to make a melee weapon attack: +6 to hit, reach 10 ft., one target. Also, Hit: 6 (1d4 + 4) piercing damage, and also the target must make a DC 11 Constitution saving throw, even it is taking 10 (3d6) poison damage on a failed save, or else half as much damage on a successful one.
Attributes Of D&D Giant Poisonous Snake
|Roll 0||Bite 1d20 + 6 1d4+4|
|Senses||Blindsight 10 Ft.|
|Speed||30 ft., swim 30 ft.|