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Computer Science Engineering (CSE) Exam  >  Computer Science Engineering (CSE) Tests  >  Test: Keys - Computer Science Engineering (CSE) MCQ

Test: Keys - Computer Science Engineering (CSE) MCQ


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10 Questions MCQ Test - Test: Keys

Test: Keys for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Test: Keys questions and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus.The Test: Keys MCQs are made for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Keys below.
Solutions of Test: Keys questions in English are available as part of our course for Computer Science Engineering (CSE) & Test: Keys solutions in Hindi for Computer Science Engineering (CSE) course. Download more important topics, notes, lectures and mock test series for Computer Science Engineering (CSE) Exam by signing up for free. Attempt Test: Keys | 10 questions in 30 minutes | Mock test for Computer Science Engineering (CSE) preparation | Free important questions MCQ to study for Computer Science Engineering (CSE) Exam | Download free PDF with solutions
Test: Keys - Question 1
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A _________ integrity constraint requires that the values appearing in specified attributes of any tuple in the referencing relation also appear in specified attributes of at least one tuple in the referenced relation.

Detailed Solution for Test: Keys - Question 1

A relation, say r1, may include among its attributes the primary key of another relation, say r2. This attribute is called a foreign key from r1, referencing r2. The relation r1 is also called the referencing relation of the foreign key dependency, and r2 is called the referenced relation of the foreign key.

Test: Keys - Question 2
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The relation with the attribute which is the primary key is referenced in another relation. The relation which has the attribute as a primary key is called ______________

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Test: Keys - Question 3
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Which one of the following cannot be taken as a primary key?

Detailed Solution for Test: Keys - Question 3

Street is the only attribute which can occur more than once.

Test: Keys - Question 4
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A _____ is a property of the entire relation, rather than of the individual tuples in which each tuple is unique.
Detailed Solution for Test: Keys - Question 4

Key is the constraint which specifies uniqueness.

Test: Keys - Question 5
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Consider attributes ID, CITY and NAME. Which one of this can be considered as a super key?
Detailed Solution for Test: Keys - Question 5

Here the id is the only attribute which can be taken as a key. Other attributes are not uniquely identified.

Test: Keys - Question 6
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The ______ is the one in which the primary key of one relation is used as a normal attribute in another relation.
Test: Keys - Question 7
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An attribute in a relation is a foreign key if the _______ key from one relation is used as an attribute in that relation.
Detailed Solution for Test: Keys - Question 7

The primary key has to be referred in the other relation to form a foreign key in that relation.

Test: Keys - Question 8
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Which one of the following attribute can be taken as a primary key?
Detailed Solution for Test: Keys - Question 8

The attributes name, street and department can repeat for some tuples. But the id attribute has to be unique. So it forms a primary key.

Test: Keys - Question 9
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The subset of a super key is a candidate key under what condition?
Detailed Solution for Test: Keys - Question 9

The subset of a set cannot be the same set. Candidate key is a set from a super key which cannot be the whole of the super set.

Test: Keys - Question 10
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Which one of the following is a set of one or more attributes taken collectively to uniquely identify a record?
Detailed Solution for Test: Keys - Question 10

Super key is the superset of all the keys in a relation.

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