Answer To The Question No: 01

We need to change the pointer variable name temp when we create a new node because the compiler will take the latest name of the variable that's why we change the variable name when creating a new node in the linked list.

Answer To The Question No: 02
The meaning of a null to the address part of a node indicates that the node is not linked up with any other node next to it. This node will not point to any next node. The node is the last and is not linked with any node.