has & did

[britfan]

Take a look at my sentence please.
a. Where has he wandered off to?
Can I also say this?
b. Where did he wander off to?

 

[emsr2d2]

You can. a) would suggest that the person's whereabouts are not currently known. b) would suggest that the person's whereabouts are now known but they weren't known at some point previously.