if you have magic kingdom it may even be longer than that before you find out your exact location.
On my check-in day I just knew I was operations.
On day 2, I found out I was Ad/Lib ops (Adventureland/Liberty Square Attractions).
The first day in the magic kingdom was called "Be our Guest." They showed us (a group of about 30-50) around the park and took us on a few of the attractions. We were essentially Disney's "guests." Beware, it starts VERY early (before the park even opens) and traditions attire is required.
At the end of the first day we were separated into our areas so I was with other Ad/Lib cast members.
The next few days is called "for our guest." They show us around our area and teach us about Disney guest interaction (for me it was called the 7 guest service guidelines-- but now it's called BASICS). You have to walk up to cast members and ask them questions as a guest to see how they answer you.
It wasn't until the end of the first or second day of "for our guest" that we even found out our exact attractions.
I was assigned Jungle Cruise. It was probably the best assignment I could have ever received. I loved every second of working there and go back as often as possible. I became best friends with the people I worked with (MANY CPs work there, along with many younger full and part-timers) and we hung out with each other far more than any of our roommates or the other people in our complexes.
It was fun, but I've gotta tell you, receiving a 24 page spiel was a bit daunting on the first day