Relational Model – 1 – 2

6. The database schema is written in :

(a) HLL
(b) DML
(c) DDL
(d) DCL

ANSWER

EXPLANATION

7. In an E-R diagram attributes are represented by :

(a) rectangle.
(b) square.
(c) ellipse.
(d) triangle.

ANSWER

EXPLANATION

8. ‘AS’ clause is used in SQL for :

(a) Selection operation.
(b) Rename operation.
(c) Join operation.
(d) Projection operation.

ANSWER

EXPLANATION

9. The language used in application programs to request data from the DBMS is referred to as the :

(a) DML
(b) DDL
(c) VDL
(d) SDL

ANSWER

EXPLANATION

10. A relational database developer refers to a record as :

(a) a criteria.
(b) a relation.
(c) a tuple.
(d) an attribute. 

ANSWER

EXPLANATION

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