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DBI202 Exam Practice Questions and Answers

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DBI202 Exam Practice Questions and Answers Which of following feature is NOT responsibility of Database Management System? A. Allow users to create new databases and specify their schemas B. Give users the ability to query the data C. Support the storage of very large amounts of data D. Manag...

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DBI202 Exam Practice Questions and
Answers

Which of following feature is NOT responsibility of Database Management System?




A. Allow users to create new databases and specify their schemas


B. Give users the ability to query the data


C. Support the storage of very large amounts of data


D. Manage user accounts of computer on which DBMS is running - Answer✔✔-d


Which of following statement is correct?




A. Every relation must have only one primary key


B. Primary key has only one attribute


C. Two tuples can have the same values on primary key's components


D. Super key is a special primary key - Answer✔✔-a


The database language that is used to query and modify the database is called ____:




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A. Data Definition Language


B. Data Manipulation Language


C. Data Control Language


D. All of the others - Answer✔✔-b


A rule that states that each foreign key value must match a primary key value in other relation is

called the ____




A. Referential integrity constraint


B. Key match rule


C. Foreign/primary match rule


D. Entity key group rule - Answer✔✔-a


A constraint between two attribute sets in a relation is called ____




A. Functional relation


B. Attribute dependency


C. Functional dependency


D. Functional relation constraint - Answer✔✔-c



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Which of the following may be used to describe the relationship between two relations?




A. Super key


B. Alternate Key


C. Compose key


D. Foreign key - Answer✔✔-d


The number of entity sets that participate in a relationship is called the ____




A Identifying characteristic


B. Degree


C. Entity


D. Entity set - Answer✔✔-b


Suppose relation R(ABCD) with functional dependencies set F={AB, BC, BCD}. Which of

followings is a key of R?




A. A


B. B


C. AB
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D. BC - Answer✔✔-a


Suppose relation R(ABCD) with functional dependencies set F={AB, BC, BCD}. Which of the

highest Normal form of R?




A. 1NF


B. 2NF


C. 3NF


D. BCNF - Answer✔✔-b


Given relation R(ABCDE) with functional dependencies set F={AB, BC, BCD, CE}. Compute {B}+




A. {ABCDE}


B. {BCDE}


C. {AB}


D. {CDE} - Answer✔✔-b


A _______is a set of attributes of a relation whose values can be used to uniquely identify a row




A. Foreign key



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