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( 1 ) We indicate roles in E-R diagrams by labeling the lines that connect ___________ to __________.
- 1) Diamond , diamond
- 2) Rectangle, diamond
- 3) Rectangle, rectangle
- 4) Diamond, rectangle
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Show Answer Report Discussion in forumAnswer : 4) Diamond, rectangle
Solution : Diamond represents a relationship set and rectangle represents a entity set.
discussion
Answer : 4) Diamond, rectangle
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( 2 ) The RAID level which mirroring is done along with stripping is
- 1) RAID 1+0
- 2) RAID 0
- 3) RAID 2
- 4) Both a and b
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Show Answer Report Discussion in forumAnswer : 4) Both a and b
Solution : Mirroring without striping can also be used with arrays of disks, to give the appearance of a single large, reliable disk
discussion
Answer : 4) Both a and b
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( 3 ) By default sql server has ___________ isolation level
- 1) READ COMMITTED
- 2) READ UNCOMMITTED
- 3) SERIALIZABLE
- 4) REPEATABLE READ
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Show Answer Report Discussion in forumAnswer : 1) READ COMMITTED
Solution : Read committed is used to commit the default read operation.
discussion
Answer : 1) READ COMMITTED
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( 4 ) ........ data type can store unstructured data
- 1) RAW
- 2) CHAR
- 3) NUMERIC
- 4) VARCHAR
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Show Answer Report Discussion in forumAnswer : 1) RAW
Solution : Raw data type can store unstructured data. Which is collection of data in any form.
discussion
Answer : 1) RAW
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( 5 ) A data type that creates unique numbers for key columns in Microsoft Access is:
- 1) ) Sequential number
- 2) Sequential key
- 3) Boolean
- 4) Autonumber
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Show Answer Report Discussion in forumAnswer : 4) Autonumber
Solution : This can be taken as a primary key .
discussion
Answer : 4) Autonumber
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( 6 ) The view of total database content is
- 1) Conceptual view
- 2) Internal view
- 3) External view
- 4) Physical view
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Show Answer Report Discussion in forumAnswer : 1) Conceptual view
Solution : The view of total database content is conceptual view. (Conceptual view represents the global view of the data)
discussion
Answer : 1) Conceptual view
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( 7 ) Execution of a transaction in isolation preserve ____________ of the database
- 1) consistency
- 2) isolation
- 3) durability
- 4) atomicity
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Show Answer Report Discussion in forumAnswer : 1) consistency
Solution : Execution of a transaction in isolation preserve consistency of the database
discussion
Answer : 1) consistency
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( 8 ) A relational algebra operation annotated with instructions on how to evaluate it is called ____________.
- 1) evaluation primitive
- 2) query execution plan
- 3) query evaluation plan
- 4) query processing
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Show Answer Report Discussion in forumAnswer : 1) evaluation primitive
Solution : A relational algebra operation annotated with instructions on how to evaluate it is called evaluation primitive.
discussion
Answer : 1) evaluation primitive
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( 9 ) What is a relationship called when it is maintained between two entities?
- 1) Unary
- 2) Binary
- 3) Ternary
- 4) Quaternary
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Show Answer Report Discussion in forumAnswer : 2) Binary
Solution : Binary word usually represents two attributes.
discussion
Answer : 2) Binary
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( 10 ) Which is a join condition contains an equality operator:
- 1) Equijoins
- 2) Cartesian
- 3) Natural
- 4) Left
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Show Answer Report Discussion in forumAnswer : 1) Equijoins
Solution : An equijoin is a join with a join condition containing an equality operator. An equijoin combines rows that have equivalent values for the specified columns.
discussion
Answer : 1) Equijoins
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