I want to start a career in programming C\\\\C++ or Python. Is there any certain sample task or what kind of tasks can be required from the junior programmer?

https://www.edx.org/course/cs50s-introduction-computer-science-harvardx-cs50x

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i am happy to advise you to this course.

this course's name is " Introduction to Computer Science " .

they will teach you programming and some skills to help you understand the world of computer in diffrent way.

i hope you injoy it.