Which of the following commands is used to display user resource limits?

`uname` is used to display system information like the kernel name, version, and architecture, not user resource limits.

`limit -a` is a command used in C shell (csh/tcsh) to display limits, but `ulimit` is the more widely adopted and standard command across Bourne-like shells (sh, bash, ksh).

`usrlmt` is not a standard Unix/Linux command for managing or displaying user resource limits.

The `ulimit` command is the standard Unix/Linux utility used to display and set various resource limits, such as maximum open files, process count, or memory, for the current shell and any processes initiated from it.