1
GATE CSE 2024 Set 2
MCQ (Single Correct Answer)
+1
-0.33

In the context of owner and weak entity sets in the ER (Entity-Relationship) data model, which one of the following statements is TRUE?

A

The weak entity set MUST have total participation in the identifying relationship

B

The owner entity set MUST have total participation in the identifying relationship

C

Both weak and owner entity sets MUST have total participation in the identifying relationship

D

Neither weak entity set nor owner entity set MUST have total participation in the identifying relationship

2
GATE CSE 2024 Set 1
MCQ (Single Correct Answer)
+1
-0.33

Let S be the specification : "Instructors teach courses. Students register for courses. Courses are allocated classrooms. Instructors guide students." Which one of the following ER diagrams CORRECTLY represents S?

GATE CSE 2024 Set 1 Database Management System - Er Diagrams Question 2 English 1 GATE CSE 2024 Set 1 Database Management System - Er Diagrams Question 2 English 2

A

(i)

B

(ii)

C

(iii)

D

(iv)

3
GATE CSE 2023
MCQ (Single Correct Answer)
+1
-0.33

Which one of the options given below refers to the degree (or arity) of a relation in relational database systems?

A
Number of attributes of its relation schema.
B
Number of tuples stored in the relation.
C
Number of entries in the relation.
D
Number of distinct domains of its relation schema.
4
GATE CSE 2020
MCQ (Single Correct Answer)
+1
-0.33
Which one of the following is used to represent the supporting many-one relationships of a weak entity set in an entity-relationship diagram?
A
Rectangles with double/bold border
B
Diamonds with double/bold border
C
Ovals that contain underlined identifiers
D
Ovals with double/bold border
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