1
GATE CSE 2013
MCQ (Single Correct Answer)
+1
-0.3
An index is clustered, if
A
It is on a set of fields that form a candidate key.
B
It is on a set of fields that include the primary key.
C
The data records of the file are organized in the same order as the data entries of the index.
D
The data records of the file are organized not in the same order as the data entries of the index.
2
GATE CSE 2012
MCQ (Single Correct Answer)
+1
-0.3
Given the basic $$ER$$ and relational models, which of the following is INCORRECT?
A
An attribute of an entity can have more than one value
B
An attribute of an entity can be composite
C
In a row of a relational table, an attribute can have more than one value
D
In a row of a relational table, an attribute can have exactly one value or a NULL value
3
GATE CSE 2011
MCQ (Single Correct Answer)
+1
-0.3
Consider a relation table with a single record for each registered student with a single record for each registered student with the following attributes.
$$1.$$ $$Registration$$ $$Num:$$ Unique registration number of each registered student.
$$2.$$ $$UID :$$ Unique identity number, unique at the national level for each cityzen.
$$3.$$ $$BankAccount_Num:$$ Unique account number at the bank. A student can have multiple accounts or joint accounts. This attribute stores the primary account number.
$$4.$$ $$Name:$$ Name of the student
$$5.$$ $$Hostel$$ $$Room:$$ Room number of the hostel.

Which of the following options is INCORRECT?

A
$$BankAccount$$ $$Num$$ is candidate key
B
$$Registration$$ $$Num$$ can be a primary key
C
$$UID$$ is a candidate key if all students are from the same country
D
If $$S$$ is a superkey such that $$S \cap UID$$ is NULL then $$S \cup UID$$ is also a superkey
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 5 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
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