Answer / krishna

It contains all the kernel modules that needed to be loaded
into kernel (booting etc). there will some .map, .dep
(dependency files) files present.

When the kernel needs a feature that is not resident in the
kernel, the kernel module daemon kmod[1] execs modprobe to
load the module in.

You can see what modules are already loaded into the kernel
by running lsmod, which gets its information by reading the
file /proc/modules

Answer / sj

modular device driver files, mostly with .o extensions

diff b/w spinlock, seamaphores and mutex and where to use it.

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