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What does data dictionary is a special file contains ? The data dictionary is a special file contain The name of all fields in all files.The width of all fields in all files an
What are object interaction diagrams? Object interaction diagrams are the diagrams that used to describe order in which messages are communicated in execution of an operation,
entity relationship diagram for online examination system
What is the aim of object design The aim of object design is to identify object which the system contains and the interactions among them. The system implements specification
Explain the difference between the three storage types - volatile, non volatile and stable. Ans: Volatile storage: if storage media loses data while power goes off,
Write short notes on extension and intension? In any data model, it is significant to distinguish among the description of the database and the database itself the description
what is query processing ,query optimization and performance turring?
What are the two types of serializability? The two types of serializability is a) Conflict serializability b) View serializability
What is serializability? Explain its types? The data base system must control concurrent implementation of transactions, to ensure that the data base state remains consistent.
Explain Clustering file organization (i) Determine if a record of file is physically ordered on a nonkey field - that does not comprise a different value for each record - that
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