Hackerank Coursera for DS position

Hey got so overwhelmed after I received the hackerank invitation. It will be sql, data visualization and probability related. Have background in ML and Data but I took it as a short course (1 year) and mostly use R in data exploitation so pretty nervous for the test. This is my shot trying to get into DS role and definitely want to do my best. Hopefully the veterans can give some tips how I can prep the test. Thanks.

#dataanalytics
#data
#hackerank
#coursera
#interview
#sql #sqlinterview