(b) When is it useful to have replication or fragmentation of data in distributed database systems? Is it possible to combine replication and fragmentation? How is vertical fragmentation different from horizontal fragmentation? Explain with the help of an example.

When should distributed database systems employ data replication to address data fragmentation if it is a problem? It seems that the processes of fragmentation and replication are incompatible. What distinguishes vertical fragmentation from horizontal fragmentation? Give me an example so I can better grasp your position.

When should data replication and data fragmentation be used in distributed database systems? What about combining replication and fragmentation? Can you explain the distinction between vertical and horizontal fragmentation? Could you provide me an illustration of your argument?

When using a distributed database system, when should we employ replication vs data fragmentation? Is it possible to mix replication with fragmentation? Where do lateral and vertical fragments vary and what do they mean? Could you provide me with an illustration of your argument?