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MCQs DBMS|UGC-NET|GATE|Computer Science

41.What property of the files prevents sharing of files and directories?
A.Tree structure
B.One level structure
C.Two level structure
D.Length
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42.E-R modeling technique is:
A.Tree structure
B.Top-down method
C.Bottom-up method
D.Right-left approach
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43.Data items stored as grouped items is:
A.Record
B.List
C.Strings
D.Title list
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44.Data items are fragmented, replicated and propagated in:
A.DBMS
B.RDBMS
C.DDBMS
D.DML
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45.If every non-key attribute is functionally dependent on the primary key, then the relation will be in
A.1NF
B.2NF
C.3NF
D.4NF
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46.which of the following is record based logical model(s)?
A.Network Model
B.Object-oriented model
C.Relational Model
D.Entity Relationship Model
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47.In an E-R diagram ellipses represents
A.Entity sets
B.relationship among entity sets
C.attributes
D.link in attributes & entity sets
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48.The set of permitted values for each attribute is called its
A.Attribute set
B.attribute range
C.domain
D.group
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49.Relations produced from an E-R model will always be in
A.1NF
B.2NF
C.3NF
D.4NF
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50.E-R modeling technique is a
A.Top-down approach
B.Bottom-up approach
C.Left-right approach
D.none of above
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Author Does Not claim of any answer these answers are as per expert opinion


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