Which one of the following statements is false?
Answer: B
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NULL is
Answer: D
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Before use of DBMS information was stored using __________.
Answer: C
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In an Enterprise-class database system, business users interact directly with database applications that interact with the DBMS, which directly accesses the database data.
Answer: A
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Which of the following is record based logical model?
Answer: A
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An on-line commercial site such as Amazon.com is an example of a(n) ________ .
Answer: C
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A database has data and relationships.
Answer: A
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The result of the UNION operation between R1 and R2 is a relation that includes
Answer: C
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E-R model uses this symbol to represent weak entity set ?
Answer: C
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The DBMS acts as an interface between what two components of an enterprise-class database system?
Answer: A
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