Relational DBMS Objective Questions and Answers : Database Management System MCQs

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Questions
26 A number of related records that are treated as a unit is called :
A file
B field
C data
D batch

Answer: Option [A]
27 One limitation of the entity-relationship model is that it cannot :
A use generalization
B express relationship among relationships
C use single primary key
D none of the above

Answer: Option [B]
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28 In a relational schema, each tuple is divided into fields is called :
A Relations
B Domains
C Queries
D None of the above

Answer: Option [B]
29 The relational model is concerned with :
A Data structure and data integrity
B Data manipulation
C Both [A] and [B]
D None of these

Answer: Option [C]
30 Which of the following is not a logical database structure ?
A tree
B relational
C network
D chain

Answer: Option [D]

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