1
GATE CSE 2008
+2
-0.6
Consider the following $$ER$$ diagram

The minimum number of table needed to represent $$M,$$ $$N,$$ $$P, R1, R2$$ is

A
$$2$$
B
$$3$$
C
$$4$$
D
$$5$$
2
GATE CSE 2008
+2
-0.6
Consider the following $$ER$$ diagram

Which of the following is a correct attribute set for one of the tables for the correct answer to the above question?

A
$$\left\{ {M1,\,M2,\,M3,\,P1} \right\}$$
B
$$\left\{ {M1,\,P1,\,N1,\,N2} \right\}$$
C
$$\left\{ {M1,\,P1,\,N1} \right\}$$
D
$$\left\{ {M1,\,P1} \right\}$$
3
GATE CSE 2005
+2
-0.6
Let $${E_1}$$ and $${E_2}$$ be two entities in an E-R diagram with simple single-valued attributes, $${E_1}$$ and $${E_2}$$ are two relationships between $${E_1}$$ and $${E_2}$$, Where $${E_1}$$ is one-to-many and $${E_2}$$ is many-to-many. $${E_1}$$ and $${E_2}$$ do not have any attributes of their own. What is the minimum number of tables required represent this situation in the relation model?
A
$$2$$
B
$$3$$
C
$$4$$
D
$$5$$
4
GATE CSE 2005
+2
-0.6
The following table has two attributes $$A$$ and $$C$$ where $$A$$ is the primary key and $$C$$ is the foreign key referencing $$A$$ with on-delete cascade.

The set of all tuples that must be additionally deleted to preserve referential integrity. When the tuple $$(2,4)$$ is deleted is:

A
$$(3,4)$$ and $$(6,4)$$
B
$$(5,2)$$ and $$(7,2)$$
C
$$(5, 2),$$ $$(7,2)$$ and $$(9,5)$$
D
$$(3, 4),(4,3)$$ and $$(6,4)$$
GATE CSE Subjects
EXAM MAP
Medical
NEET