Which statement describes a Land Grid Array (LGA) socket?

A Land Grid Array (LGA) socket is characterized by having a surface with a grid of contacts that correspond to the pads on the processor. This design allows for the pins to be part of the socket rather than being present on the processor itself. The processor fits into the socket, and the contact pads on the underside of the processor make contact with these pins to facilitate electrical connections.

In this configuration, the pins are actually located in the socket on the motherboard, which is why the statement about pins that stick out of the motherboard accurately describes an LGA socket. This structure allows for a more robust connection and reduces the chance of damaging the pins during processor installation, as the pins remain stationary in the socket while the processor is inserted.

The other options misrepresent the LGA socket: the pins are not on the processor but on the socket itself; it is not a type of memory stick; and it is not limited to server processors, as LGA sockets are also used for various consumer-grade processors.