Which one is better Hadoop or spark?

Related questions

1. How long will it take to learn Hadoop?
2. Is Spark part of Hadoop?
3. Does spark replace Hadoop?
4. Is Hadoop required for spark?
5. Can I learn spark without Hadoop?
6. What is the difference between Scala and Spark?
7. Is Apache spark a database?
8. Is spark based on Hadoop?
9. Is Apache spark tough to learn?
10. What exactly is Apache spark?

Tags

1. #hadoop
2. #computing
3. #spark
4. #between
5. #source
6. #mapreduce
7. #faster
8. #question
9. #times
10. #engine
11. #answer
12. #comparison
13. #apache
14. #advanced
15. #detailed
16. #framework