Which is better to learn spark or Hadoop?

Related questions

1. Is spark a programming language?
2. Do we need Scala for spark?
3. What language is spark?
4. What is spark in data science?
5. Do I need Hadoop for spark?
6. Is Scala needed for spark?
7. Should I learn spark?
8. Which language is better for spark?
9. What is Spark used for?
10. Why Scala is better than Python?

Tags

1. #analytics
2. #source
3. #inheriting
4. #mapreduce
5. #separate
6. #mainly
7. #framework
8. #write
9. #designed
10. #system
11. #classes
12. #faster
13. #another
14. #which
15. #integrated
16. #hadoop
17. #spark