When I do 'top', I learn that there are many processes running out of which many are in sleep state. I need to see complete snapshot of all processes at that point. the 'top' is able to show listing of processes, which fit in one screen.How do I get complete listing?
Among other things, I am interested in seeing list of all processes, which are in "sleeping" state. I don't think, I can get process state in output of "ps" command
top -b seems to be doing the trick.
-n1 option will gives one full page then exit. top -l1 works in OS X/macOS to list all processes with states, although %CPU will be incorrect for a single sample with -l, as it is calculated using the delta between samples. You can get process states with coreutils ps
$ ps aux will list all that, and more. Here's how you can decode them, from the man page:
PROCESS STATE CODES
Here are the different values that the s, stat and state output specifiers (header "STAT" or "S") will display to describe the state of a process:
D uninterruptible sleep (usually IO) R running or runnable (on run queue) S interruptible sleep (waiting for an event to complete) T stopped, either by a job control signal or because it is being traced. W paging (not valid since the 2.6.xx kernel) X dead (should never be seen) Z defunct ("zombie") process, terminated but not reaped by its parent. For BSD formats and when the stat keyword is used, additional characters may be displayed:
< high-priority (not nice to other users) N low-priority (nice to other users) L has pages locked into memory (for real-time and custom IO) s is a session leader l is multi-threaded (using CLONE_THREAD, like NPTL pthreads do) + is in the foreground process group. 
htop. Its process list is scrollable.