Relational Database Management System MCQs | DBMS Objective Type Interview Questions and Answers

11 A primary key :
A is also referred to as a composite key
B is a unique identifier in a column
C uniquely identities the data in row
D must be accompanied by a corresponding foreign key

Answer: Option [B]
12 Duplicate data is referred to as :
A accurate data
B redundant data
C storage data
D none of the above

Answer: Option [B]
13 A relation in third normal form is :
A in first normal form also
B second normal form also
C from transitive dependencies
D all of the above

Answer: Option [D]
14 In a relational database a referential integrity constraint can be specified with the help of
A primary key
B foreign key
C secondary key
D none of the above

Answer: Option [B]
15 In a relation
A Ordering of rows is immaterial
B No two rows are identical
C Both [A] and [B] are true
D None of the above

Answer: Option [C]


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