Which of the following is/are disadvantage/s of distributed databases?
a) high cost
b) processing overheads
c) data integrity
d) all of these
The database may be broken into logical units is called…….
a) fragments
b) integrity
c) replication
d) none of these
How many types of data fragmentation?
a) one
b) two
c) three
d) four
Explanation: vertical fragmentation, horizontal fragmentation
The table that is broken into two or more sets of columns is
called……
a) horizontal fragmentation
b) vertical fragmentation
c) medium fragmentation
d) data replication
The table that is broken into two or more sets of rows is called……
a) horizontal fragmentation
b) vertical fragmentation
c) medium fragmentation
d) data replication
The copy of data fragment may be stored at several sites is known as……..
a) horizontal fragmentation
b) vertical fragmentation
c) medium fragmentation
d) data replication
