Will the backlinks of a deleted domain will give me link juice if I build a site back on it after registering? Say, if the domain was PR5 with good backlinks and the domain got dropped and if i register the domain and build a site, will the backlinks again prove me worth it?
If they get re-indexed by Google they will probably give you link juice again. Also, many of the links will not be to your index page, so they will probably not be beneficial in PR terms, but they might give you some additional traffic if you got a good 404 page.
According to my experience: after creating a website on a dropped domain and adding it to Google Webmasters you can see your backlinks. Then you can check which old pages those links point to and create 301 redirects to some pages of your new website. This should keep the link juice and existing pagerank.
In my experience, the link juice and PR last as long as the next Google updates takes place. After this, juice is often null and PR is 0, unless you develop a domain building content similar to the topic the site originally was.
Totally agree, I usually checked the backlinks, if one of the strongest backlinks point to the inner page I will recreate the inner page just to receive the link juice
I have experienced this before and it was really a benefit but to be honest I built exactly the same site as it was before I just browsed over the site using archive and used the same linkings and everything exactly. It did gave me same rankings and everything is good till today. A friend of mine who registered an old PR4 domain and built complete different site lost PR on next update.