2: A. No two rows in a table can be the same
3: C. Concurrency Control
4: C. 3NF
5: D. Management of Data
6: C. Concepts
7: B. Data Structures, Data Manipulation, Integrity Constraints
8: B. Applications
9: C. Master Codes
10: B. Joins
11: C. Select
12: C. Retaining a small amount of redundant data improves query speed
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Second:
1: A.relationship
2:D.unknown or meaningless values
3:D.improves query speed for the user
4:B.from
5:B.eliminates insertion exceptions, deletion exceptions and data redundancy
6:D. isolation
7:B. relational data model
8:A. does not affect the application due to changes in data
9:C. concurrency control
10:B. master code