Computer Science Engineering (CSE) Exam > Computer Science Engineering (CSE) Questions > Consider the schema R = (A, B, C, D, E, F) on...
Start Learning for Free
Consider the schema R = (A, B, C, D, E, F) on which the following functional dependencies hold:
A ➝ B
B, C ➝ D
E ➝ C
D ➝ A
A ➝ B
B, C ➝ D
E ➝ C
D ➝ A
What are the candidate keys of R?
- a)AEF, BEF and DEF
- b)AEF, BEF and BCF
- c)AE and BE
- d)AE, BE and DE
Correct answer is option 'A'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Most Upvoted Answer
Consider the schema R = (A, B, C, D, E, F) on which the following func...
Concept:
Candidate key: it is the set of attributes which uniquely identifies a relation. It is also known as superkey with no repeated attributes.
Candidate key: it is the set of attributes which uniquely identifies a relation. It is also known as superkey with no repeated attributes.
Given relation R = {A, B, C, D, E}
A ➝ B
B, C ➝ D
E ➝ C
D ➝ A
A ➝ B
B, C ➝ D
E ➝ C
D ➝ A
Find the closure of keys given. If all the attributes of relation are present in the closure, then it will be the candidate key of that relation.
Option1: AEF, BEF and DEF
(AEF)+ = {A, E, F, B, C, D}
(BEF)+ = {B, E, F, C, D, A}
(DEF)+ = {D, E, F, C, A, B}
These are the candidate keys of given relation.
(AEF)+ = {A, E, F, B, C, D}
(BEF)+ = {B, E, F, C, D, A}
(DEF)+ = {D, E, F, C, A, B}
These are the candidate keys of given relation.
Option2: AEF, BEF and BCF
(AEF)+ = {A, E, F, B, C, D}
(BEF)+ = {B, E, F, C, D, A}
(BCF)+ = {B, C, F, D, A} // E is not present in the closure. Not the candidate key
(AEF)+ = {A, E, F, B, C, D}
(BEF)+ = {B, E, F, C, D, A}
(BCF)+ = {B, C, F, D, A} // E is not present in the closure. Not the candidate key
Option3: AE and BE
(AE)+ = {A, E, C, B, D, } //F is not present, not a candidate key
(BE)+ = {B, E, C, D, A} //F is not present, not a candidate key
(AE)+ = {A, E, C, B, D, } //F is not present, not a candidate key
(BE)+ = {B, E, C, D, A} //F is not present, not a candidate key
Option4: AE, BE and DE
(AE)+ = {A, E, C, B, D, } //F is not present, not a candidate key
(BE)+ = {B, E, C, D, A} //F is not present, not a candidate key
(DE)+ = {D, E, A, C, B} //F is not present, not a candidate key
(AE)+ = {A, E, C, B, D, } //F is not present, not a candidate key
(BE)+ = {B, E, C, D, A} //F is not present, not a candidate key
(DE)+ = {D, E, A, C, B} //F is not present, not a candidate key
Attention Computer Science Engineering (CSE) Students!
To make sure you are not studying endlessly, EduRev has designed Computer Science Engineering (CSE) study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Computer Science Engineering (CSE).
|
Explore Courses for Computer Science Engineering (CSE) exam
|
|
Top Courses for Computer Science Engineering (CSE)View all
Consider the schema R = (A, B, C, D, E, F) on which the following functional dependencies hold:A ➝ BB, C ➝ DE ➝ CD ➝ AWhat are the candidate keys of R?a)AEF, BEF and DEFb)AEF, BEF and BCFc)AE and BEd)AE, BE and DECorrect answer is option 'A'. Can you explain this answer?
Question Description
Consider the schema R = (A, B, C, D, E, F) on which the following functional dependencies hold:A ➝ BB, C ➝ DE ➝ CD ➝ AWhat are the candidate keys of R?a)AEF, BEF and DEFb)AEF, BEF and BCFc)AE and BEd)AE, BE and DECorrect answer is option 'A'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about Consider the schema R = (A, B, C, D, E, F) on which the following functional dependencies hold:A ➝ BB, C ➝ DE ➝ CD ➝ AWhat are the candidate keys of R?a)AEF, BEF and DEFb)AEF, BEF and BCFc)AE and BEd)AE, BE and DECorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the schema R = (A, B, C, D, E, F) on which the following functional dependencies hold:A ➝ BB, C ➝ DE ➝ CD ➝ AWhat are the candidate keys of R?a)AEF, BEF and DEFb)AEF, BEF and BCFc)AE and BEd)AE, BE and DECorrect answer is option 'A'. Can you explain this answer?.
Consider the schema R = (A, B, C, D, E, F) on which the following functional dependencies hold:A ➝ BB, C ➝ DE ➝ CD ➝ AWhat are the candidate keys of R?a)AEF, BEF and DEFb)AEF, BEF and BCFc)AE and BEd)AE, BE and DECorrect answer is option 'A'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about Consider the schema R = (A, B, C, D, E, F) on which the following functional dependencies hold:A ➝ BB, C ➝ DE ➝ CD ➝ AWhat are the candidate keys of R?a)AEF, BEF and DEFb)AEF, BEF and BCFc)AE and BEd)AE, BE and DECorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the schema R = (A, B, C, D, E, F) on which the following functional dependencies hold:A ➝ BB, C ➝ DE ➝ CD ➝ AWhat are the candidate keys of R?a)AEF, BEF and DEFb)AEF, BEF and BCFc)AE and BEd)AE, BE and DECorrect answer is option 'A'. Can you explain this answer?.
Solutions for Consider the schema R = (A, B, C, D, E, F) on which the following functional dependencies hold:A ➝ BB, C ➝ DE ➝ CD ➝ AWhat are the candidate keys of R?a)AEF, BEF and DEFb)AEF, BEF and BCFc)AE and BEd)AE, BE and DECorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Computer Science Engineering (CSE).
Download more important topics, notes, lectures and mock test series for Computer Science Engineering (CSE) Exam by signing up for free.
Here you can find the meaning of Consider the schema R = (A, B, C, D, E, F) on which the following functional dependencies hold:A ➝ BB, C ➝ DE ➝ CD ➝ AWhat are the candidate keys of R?a)AEF, BEF and DEFb)AEF, BEF and BCFc)AE and BEd)AE, BE and DECorrect answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Consider the schema R = (A, B, C, D, E, F) on which the following functional dependencies hold:A ➝ BB, C ➝ DE ➝ CD ➝ AWhat are the candidate keys of R?a)AEF, BEF and DEFb)AEF, BEF and BCFc)AE and BEd)AE, BE and DECorrect answer is option 'A'. Can you explain this answer?, a detailed solution for Consider the schema R = (A, B, C, D, E, F) on which the following functional dependencies hold:A ➝ BB, C ➝ DE ➝ CD ➝ AWhat are the candidate keys of R?a)AEF, BEF and DEFb)AEF, BEF and BCFc)AE and BEd)AE, BE and DECorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of Consider the schema R = (A, B, C, D, E, F) on which the following functional dependencies hold:A ➝ BB, C ➝ DE ➝ CD ➝ AWhat are the candidate keys of R?a)AEF, BEF and DEFb)AEF, BEF and BCFc)AE and BEd)AE, BE and DECorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Consider the schema R = (A, B, C, D, E, F) on which the following functional dependencies hold:A ➝ BB, C ➝ DE ➝ CD ➝ AWhat are the candidate keys of R?a)AEF, BEF and DEFb)AEF, BEF and BCFc)AE and BEd)AE, BE and DECorrect answer is option 'A'. Can you explain this answer? tests, examples and also practice Computer Science Engineering (CSE) tests.
|
|
Explore Courses for Computer Science Engineering (CSE) exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup