how to check that nfsmounted filesystem on nfsclient is accessible or not

hello,
on Linux machine,how can i check with any command or any trick that nfs mounted file system is actually accessible or not w/o creating any file in nfsmounted location.mount,df -t nfs etc commands will only show mount entries but in case of small storage which is nfs mounted ,how to know whether actually client can access it or not?

man nfsstat