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# System prepended metadata

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DP900 basic questions

1. In structured data, what are data entity, instances of the entity and attributes of the entity ?

2. Is structured data must be stored in relational databases ?

3. Are JSON and XML just for semi-structured data ?

4. Which date format stores data in binary ?

5. In Relational database, what is primary key and foreign key?

6. What is ACID ?

7. What is a transaction ?

8. Is NoSQL doesn't use SQL ?

9. What is Horizontal scaling and Vertical scaling ?

10. Can we say for the OLAP system the data will be from OLTP ?

11. Can a NoSQL database be used for relational data ?

12. Non-relational data refers to NoSQL databases that can store structured, semi-structured, and unstructured data ?

13. IaaS, PaaS, SaaS

14. Can batch processing output data to a relational databse and to an non relational database ?



