Suggest some sites for good programming questions

Answer 1

www.sanfoundry.com

This site has excellent exercises and quiz questions

Answer 2

You can start with the code coach available here in sololearn. Once done with it you can proceed to do more questions on the site's provided by 𝐊𝐢𝐢𝐛𝐨 𝐆𝐡𝐚𝐲𝐚𝐥 and Samsil Arefeen

Answer 3

codeforces
codechef
codewars
leetcode(for interview question)
codewars
topcoder

Answer 4

These may help you...
Use search bar for more....
https://www.sololearn.com/discuss/459759/?ref=app
https://www.sololearn.com/discuss/581177/?ref=app
https://www.sololearn.com/discuss/1035622/?ref=app
https://www.sololearn.com/discuss/681139/?ref=app
https://www.sololearn.com/discuss/554746/?ref=app