Installing new kernes without restarting question

Hi

---

On another topic George told me that i can install using yum-update new updates and new kernels without restarting the server.....

Now i want to ask if i install 4-5 kernels without restart if i will get any problems and my second question is if i restart after installing so many kernels the system will boot with the newest kernel from the 4-5 without any problems?

Thanks

 

I am talking for a typical setup and Centminmod in it without any customizations....