Relationships among relationships can be represented in an E-R model using
Aggregation
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Association
Weak entity sets
Weak relationship sets
Tag: Databases MCQs
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
Systems typically allows to replace failed disks without stopping access to the system.
Systems typically allows to replace failed disks without stopping access to the system.
RAID
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RAD
RMAN
RAM
Most backup and recovery commands in ……….. are executed by server sessions.
Most backup and recovery commands in ……….. are executed by server sessions.
Recovery Manager
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Backup Manager
Backup and Recovery Manager
Database Manager
Is an alternative of log based recovery.
Is an alternative of log based recovery.
Shadow paging
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Disk recovery
Dish shadowing
Crash recovery