How many advantages of data allocation?
a) one
b) two
c) three
d) four
Explanation: efficiency, security
Which of the following are disadvantages of data allocation?
a) inconsistent access speeds
b) backup vulnerability
c) efficiency
d) both a & b
Which of the following is/are advantage/s of data replication?
a) faster and consistent access
b) reliability
c) node decoupling
d) all of these
How many disadvantages of data replication?
a) one
b) two
c) three
d) four
Explanation: update complexity, increased storage requirements
Which of the following replication is combination of fragmentation and replication?
a) complete replication
b) selective replication
c) moderate replication
d) all of these
How many functions of DDMS?
a) one
b) three
c) five
d) seven
Explanation: extended communication services, extended system catalog, distributed query processing, extended concurrency control, extended recovery services
