Manager's salary details are hidden from the employee. This is
A. | conceptual level data hiding |
B. | physical level data hiding |
C. | external level data hiding |
D. | none of these |
Option: A Explanation : Click on Discuss to view users comments. |
The employee salary should not be greater than Rs. 2000. This is
A. | integrity constraint |
B. | referential constraint |
C. | over-defined constraint |
D. | feasible constraint |
Option: A Explanation : Click on Discuss to view users comments. |
Which of the following contains a complete record of all activity that affected the contents of a database during a certain period offtime
A. | Report writer |
B. | Query language |
C. | Data manipulation language |
D. | Transaction log |
Option: D Explanation : Click on Discuss to view users comments. |