The rule that a value of a foreign key must appear as a value of some specific table is called a
Referential constraint
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Index
Integrity constraint
Functional dependency
Category: Computer Science
If an entity can belong to only one lower level entity then the constraint is
If an entity can belong to only one lower level entity then the constraint is
partial
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disjoint
overlapping
single
The common column is eliminated in
The common column is eliminated in
natural join
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outer join
theta join
composed join
Relationships among relationships can be represented in an E-R model using
Relationships among relationships can be represented in an E-R model using
Aggregation
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Association
Weak entity sets
Weak relationship sets
Relational calculus is a
Relational calculus is a
Non-Procedural language
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Procedural language
Data definition language
High level language
Cartesian product in relational algebra is
Cartesian product in relational algebra is
a Binary operator
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a Unary operator
a Ternary operator
not defined
The simplest approach to introducing redundancy is to duplicate every disk is called
The simplest approach to introducing redundancy is to duplicate every disk is called
mirroring
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imaging
copying
None of the Option is Correct
EXP command is used
EXP command is used
to take Backup of the Oracle Database
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to import data from the exported dump file
to create Rollback segments
to create Schedule.
Known as memory-style error correcting-code(ECC) organization, employs parity bits.
Known as memory-style error correcting-code(ECC) organization, employs parity bits.
RAID level 2
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RAID level 1
RAID level 4
RAID level 3
An ……… is an exact copy of a single datafile, archived redo log file, or control file.
An ……… is an exact copy of a single datafile, archived redo log file, or control file.
image copy
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datafile copy
copy log
control copy