SM58 Transaction

Hi BW Gurus,

I want to explore transaction SM58. SM13 and SMQ1. In one interview they asked abt this transaction. i don't have any SAP R/3 System. Wht we information we can get from this. how can i use these transaction while monitoring DataLoads.

If any body can provide the information about this. I would be very very Happy.

Thanks in Advance.

Regards,

Satish.