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Relational Database Management System MCQs with Answers | DBMS Objective Questions and Answers

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Database management system MCQs with answers page contain 5 questions from chapter Relational DBMS. Each multiple choice question has 4 possible answers. Choose your answer and check it with the given correct answer.
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(16) A super key is a set of one or more attributes that, taken collectively, allow us
[A] to identify uniquely an entity in the entity set
[B] to make the key most powerful for faster retrieval
[C] to increase effectiveness of database access
[D] none of the above

Comment

Answer: Option [A]
(17) What is the degree of a table with 1000 rows and 10 column ?
[A] 10
[B] 100
[C] 1000
[D] None of the above

Comment

Answer: Option [A]

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(18) Which of the following commands is used to get all the columns in a table ?
[A] #
[B] *
[C] %
[D] @

Comment

Answer: Option [B]
(19) One of the following is a valid record-based data models :
[A] Object-oriented model
[B] Relational model
[C] Entity-relationship model
[D] None of the above

Comment

Answer: Option [B]
(20) Consider the relation scheme R(A, B, C, D) where A is candidate key. With no information about FDs involved, then R is in which normal form ?
[A] First Normal Form
[B] Second Normal Form
[C] BCNF
[D] Third Normal Form

Comment

Answer: Option [D]

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DATABASE MANAGEMENT SYSTEM MULTIPLE CHOICE QUESTIONS & ANSWERS – E-BOOK

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