You can learn how to use some function to call into a database and study its behaviour, if you can grind leetcode and solve problems. It's a good enough filter

You can learn how to use some function to call into a database and study its behaviour, if you can grind leetcode and solve problems. It's a good enough filter, the alternative is either way more costly or way worse(if you have seen "interviewing" which are just thinly veiled nepotism).