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Explain briefly concurrent task by taking an example.
Concurrent Task- The concurrent occurrence of more than one event is called concurrent task. Operating systems can handle concurrent tasks capably. The Air Traffic Control system (ATC) for examples, can manage simultaneous tasks in fractions of a second.
A super key is an attribute or set of attributes used to recognize the records uniquely in a relation. For instance, in the Relation PERSON defines earlier PERSON_ID is a super
Explain five duties of Database Administrator? 1. DBA administers the three stages of the database and, in consultation along with the whole user community, sets up an defin
HOW TO SOLVE THE LP Problems by simplex method?z=x1+-3x2+2x3
#questiontypes of keys examples..
What is meant by software and hardware RAID systems? RAID can be executed with no change at the hardware level, using only software modification. Such RAID implementations are
What are the aggregate objects in the data dictionary? Views Match codes Lock objects.
What is the difference among a database schema and a database state? The collection of information stored in database at particular moment in time is known as database state a
Group By clauses • It is used to group database tuples on the basis of definite common attribute value like as employees of a department. WHERE clause still can be used
Illustrate how you can use QBE to perform logical AND and OR operation
What are audit trails? An audit trail is a log of all alters to the database along with information like which user performed the change and when the alter was performed.
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