How to improve my skills

Question

I just wanna ask you guyes if i could improve my java skills ( on data structure for more depth )
because in my collage as a cs student i found it so difficult to dealing with stack or queue .. and I know that they important to me as a programmer .. so ?? what sould i do ? I'd like to hear your suggestions ?

Answer 1

you could try the data structures track on hackerrank? and/or geeksfor geeks

Answer 2

www.hackerrank.com

Answer 3

www.geeksforgeeks.org

Answer 4

Y
@shams you are welcome!

Answer 5

i don't know what are these 😅 .. can you give me a link ?

Answer 6

thank u ^_ @marit