Which of the following year hierarchical model was developed?
a) 1965
b) 1966
c) 1967
d) 1968
Which of the following organization developed hierarchical model?
a) IBM
b) Apple
c) ANSI
d) IMS
Explanation: IBM stand for international business machinery
Which data model creates parent-child relationship between data elements and enables each child to have more than one parent?
a) hierarchical
b) network model
c) relational
d) object
Which of the following data models stores data in table structures and perform various operations on table row and column?
a) hierarchical
b) network
c) relational model
d) object
Which of the following year Codd presented a paper that contain 12 rules?
a) 1965
b) 1970
c) 1967
d) 1968
Which of the following problems of database overcome by relational model?
a) data integrity
b) data redundancy
c) both a & b
d) none of these
