1
GATE CSE 2005
MCQ (Single Correct Answer)
+2
-0.6
Consider a relation scheme $$R = \left( {A,\,B,\,C,\,D,\,E,\,H} \right)$$ on which the following functional dependencies hold: $$\left\{ {A \to B,\,\,BC \to D,\,\,E \to C,\,\,D \to A} \right\}.$$ What are the candidate keys of $$R?$$
A
$$AE, BE$$
B
$$AE, BE, DE$$
C
$$AEH, BEH, BCH$$
D
$$AEH, BEH, DEH$$
2
GATE CSE 2005
MCQ (Single Correct Answer)
+2
-0.6
In a schema with attributes $$A, B, C, D,$$ and $$E,$$ following set of functional dependencies are given
$$\eqalign{ & \,\,\,A \to B \cr & \,\,\,A \to C \cr & CD \to E \cr & \,\,\,B \to D \cr & \,\,\,E \to A \cr} $$

Which of the following functional dependencies is NOT implied by the above set?

A
$$CD \to AC$$
B
$$BD \to CD$$
C
$$BC \to CD$$
D
$$AC \to BC$$
3
GATE CSE 2005
MCQ (Single Correct Answer)
+1
-0.3
Which one of the following statements about normal forms is FALSE?
A
$$BCNF$$ is stricter than $$3NF$$
B
Lossless, dependency $$-$$ preserving decomposition into $$3NF$$ is always possible
C
Lossless, dependency - preserving decomposition into $$BCNF$$ is always possible
D
Any relation with two attributes is in $$BCNF$$
4
GATE CSE 2005
MCQ (Single Correct Answer)
+1
-0.3
Consider the entities 'hotel room', and 'person' with a many to many relationship 'lodging' as shown below GATE CSE 2005 Database Management System - Er Diagrams Question 7 English

If we wish to store information about the rent payment to be made by person(s) occupying different hotel rooms, then this information should appear as an attribute of

A
Person
B
Hotel Room
C
Lodging
D
None of these
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12