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DBMS Keys Questions And Answers

Here you can find DBMS Keys Questions and Answers.

Why DBMS Keys Questions and Answers Required?

In this DBMS Keys Questions and Answers section you can learn and practice DBMS Keys Questions and Answers to improve your skills in order to face technical inerview conducted by organisations. By Practicing these interview questions, you can easily crack any Exams interview.

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DBMS Keys Questions and Answers

1. Which one of the following is a set of one or more attributes taken collectively to uniquely identify a record?

DBMS Keys Questions and Answers

2. Consider attributes ID , CITY and NAME . Which one of this can be considered as a super key ?

DBMS Keys Questions and Answers

3. The subset of super key is a candidate key under what condition ?

DBMS Keys Questions and Answers

4. A _____ is a property of the entire relation, rather than of the individual tuples in which each tuple is unique.

DBMS Keys Questions and Answers

5. Which one of the following attribute can be taken as a primary key ?

DBMS Keys Questions and Answers

6. Which one of the following cannot be taken as a primary key ?

DBMS Keys Questions and Answers

7. A attribute in a relation is a foreign key if the _______ key from one relation is used as an attribute in that relation .

DBMS Keys Questions and Answers

8. The relation with the attribute which is the primary key is referenced in another relation. The relation which has the attribute as primary key is called

DBMS Keys Questions and Answers

9. The ______ is the one in which the primary key of one relation is used as a normal attribute in another relation .

DBMS Keys Questions and Answers

10. 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.

Home EngineeringComputer Science & EngineeringDBMS Questions and AnswersDBMS Keys

DBMS Keys Questions and Answers

This is the questions and answers section on "DBMS Keys" with the explanation for various interview, competitive examination and entrance test. Solved examples with detailed answer description, explanation are given, and it would be easy to understand. This is the DBMS Keys Questions and Answers section with the explanation for the various interviews, competitive examinations and entrance tests. So, aspirants can learn the concept and approach for solving DBMS Keys Questions. The contenders who are eager to learn the concepts of the DBMS can practice the DBMS Keys Online Test. At the last of this article, we have presented the DBMS Keys Quiz to practice the multiple choice questions and answers. Here we are offering some DBMS Keys Questions and Answers for the students to prepare for the examinations. Applicants can check the objective type questions related to the DBMS Keys in the below-provided mock tests.



DBMS Keys Questions - DBMS Keys Quiz Details

Online Test Name DBMS Keys
Exam Type Multiple Choice Questions
Category Computer Science Engineering Quiz
Number of Questions 11


Are you ready to know about the DBMS Keys? DBMS Keys are an essential part of the Relational database model. They are used to establish and identify the relationships between tables and also to uniquely identify any record or row of data inside a table. A Key can be a single attribute or a group of attributes, where the combination may act as a key. The applicants need to know all the types of the keys that are used in the Database Management System. By taking part in the DBMS Keys Online Test, the contenders can understand all the topics of the keys and their usages.



DBMS Keys Multiple Choice Questions

Students can check the DBMS Keys Multiple Choice Questions in the below online test to prepare for the examinations. All the competitors can verify all the questions in the DBMS Keys Online Test and can prepare for the examinations. We have presented the questions in the DBMS Keys Quiz which are asked in the previous exams and interviews. So, it is easy to answer the questions at the time of the tests by practicing the DBMS Keys Mock Tests. The contenders can know all the type of the questions and answers regarding DBMS Keys by taking part in the DBMS Keys Quiz.

DBMS Keys MCQ Quiz Answers with Solutions

Immediate answers for the DBMS Keys will appear in this article. Thus, the competitors can check and know the solutions along with the explanations for the DBMS Keys Multiple Choice Questions. For the sake of students, we have provided the workspace to do any rough logical expressions related to that question. In addition to this, the applicants can use the "View Answer" button to know the right option. Follow Allindiaexams.in to check more online tests.


1. Which one of the following is a set of one or more attributes taken collectively to uniquely identify a record?
  • A. Candidate key
  • B. Sub key
  • C. Super key
  • D. Foreign key
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Answer & Explanation

Answer: Option C

Explanation:

Super key

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

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2. Consider attributes ID , CITY and NAME . Which one of this can be considered as a super key ?
  • A. NAME
  • B. ID
  • C. CITY
  • D. CITY , ID
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Answer & Explanation

Answer: Option B

Explanation:

ID

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

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3. The subset of super key is a candidate key under what condition ?
  • A. No proper subset is a super key
  • B. All subsets are super keys
  • C. Subset is a super key
  • D. Each subset is a super key
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Answer & Explanation

Answer: Option A

Explanation:

No proper subset is a super key

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

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4. A _____ is a property of the entire relation, rather than of the individual tuples in which each tuple is unique.
  • A. Rows
  • B. Key
  • C. Attribute
  • D. Fields
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Answer & Explanation

Answer: Option B

Explanation:

Key

Key is the constraint which specifies uniqueness.

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5. Which one of the following attribute can be taken as a primary key ?
  • A. Name
  • B. Street
  • C. Id
  • D. Department
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Answer & Explanation

Answer: Option C

Explanation:

Id

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.

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Related Topics:

  • RAID
  • Normal Forms
  • RDBMS
  • Views
  • Indexes
  • Transactions
  • Aggregate Functions
  • Joins
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