ABI questions
 

How to find the compatibility between two redhat kernel version ?
What is ABI in Linux kernel?
How to find the information about ABI support on redhat kernel.
what other factors involves in deciding binary compatibility between two kernel versions (Redhat).

can anyone help me to understand?

Thanks,
Deenadayalan

On the kernel side, look at the CONFIG options for the supported ELF formats.

For individual programs:
readelf -h /bin/sh