I was looking on the Back End Development certification map,
i found that
all we have to learn is Node.js and Express.js and Mango DB for handling data !
but what i know, most website today use PHP , Java SE…
So will be very helpful ans easy if
we learn PHP and SQL (or Mysql) than Mango DB.
those MOST COMMON basic must have as web developer.
i may be wrong, i don’t know.