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What are the various symbols used to draw an E-R diagram (any 3)?
FDs in Entities : Student entity : Enrolment number → Student name, Address Course Entity :
Define and differentiate between ordered indexing and hashing. Ans: Ordered indexing: To gain fast random access to records in a file, we can make of an index structure. Every
Which database object does not physically exist? A view database object does not physically exist.
Determine the steps of path in association network You can analyse use of paths in association network in the following steps: Examine every operation and see what asso
Locks: Serialisabilty is just a test whether a given interleaved schedule is ok or has a concurrency related trouble. Though, it does not make sure that the interleaved concurrent
Exclusive lock It is asked for by a transaction on a data item that it wants to update. No other transaction can put either a shared lock or an exclusive lock on a dat
Question: This form represents one of a number used for each sailing of a range of boats. A passenger may go on many sailings and will have the same passenger number for each.
write on the various type of relationalkey
Define raid? Briefly explain it? A range of disk organization methods, collectively called redundant arrays of independent disks (RAID) o Improvement of reliability throug
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