Top 1000+ Solved DataBase Management System (DBMS) MCQ Questions Answer
Q. The primary key is selected from the:
a. composite keys.
b. determinants.
c. candidate keys.
d. foreign keys.
Q. In the relational model, relationships between relations or tables are created by using:
a. composite keys.
b. determinants.
c. candidate keys.
d. foreign keys.
Q. A relation is considered a:
a. Column.
b. one-dimensional table.
c. two-dimensional table.
d. three-dimensional table.
Q. One solution to the multivalued dependency constraint problem is to:
a. split the relation into two relations, each with a single theme.
b. change the theme.
c. create a new theme.
d. add a composite key.
Q. When the values in one or more attributes being used as a foreign key must exist inanother set of one or more attributes in another table, we have created a(n):
a. transitive dependency.
b. insertion anomaly.
c. referential integrity constraint.
d. normal form.
Q. In a one-to-many relationship, the entity that is on the one side of the relationship is called a(n) ________ entity.
a. Parent
b. Child
c. Instance
d. Subtype
Q. Which one of the following is a set of one or more attributes taken collectively to Uniquely identify a record?
a. Candidate key
b. Sub key
c. Super key
d. Foreign key
Q. Consider attributes ID , CITY and NAME . Which one of this can be considered as a super key ?
a. NAME
b. ID
c. CITY
d. CITY , ID
Q. The subset of super key is a candidate key under what condition ?
a. No proper subset is a super key
b. All subsets are super keys
c. Subset is a super key
d. Each subset is a super key
Q. A _____ is a property of the entire relation, rather than of the individual tuples in Which each tuple is unique.
a. Rows
b. Key
c. Attribute
d. Fields
Q. Which one of the following attribute can be taken as a primary key ?
a. Name
b. Street
c. Id
d. Department
Q. Which one of the following cannot be taken as a primary key ?
a. Id
b. Register number
c. Dept_id
d. Street
Q. A attribute in a relation is a foreign key if the _______ key from one relation is used as an attribute in that relation .
a. Candidate
b. Primary
c. Super
d. Sub
Q. The relation with the attribute which is the primary key is referenced in another relation. The relation which has the attribute as primary key is called
a. Referential relation
b. Referencing relation
c. Referenced relation
d. Referred relation
Q. The ______ is the one in which the primary key of one relation is used as a normal Attribute in another relation .
a. Referential relation
b. Referencing relation
c. Referenced relation
d. Referred relation