Question

Persistent is a property for databases. What does it mean?
1.The data cannot be deleted
2.The data should be stored on stable hardware
3.The data can be stored only on temporary memory
4.The data from different units can be connected together 1 point

Answer 1

Answer:

1

Explanation:

Rdata can not be deleted

Answer 2

Answer:

The Correct Answer would be 2. The data should be stored on stable hardware.

Explanation:

• Databases being Persistent means that all the data resides on a stable secondary storage such as a Magnetic Disk. For an example, Organizations need to retain the data about their customers, suppliers as well as inventory on a secondary stable storage as this data is repetitively in use.

• Persistency, though, doesn't mean that the data is going to last forever.  A variable used in a computer program is not said to be persistent because it usually resides in main memory and then just disappears after the program comes to an end.