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Differentiate sub-class and super-class?
The specialization of a class is known as subclasses.eg: employee is a subclass of person and teller is a subclass of employee. Conversely, employee is a super class of teller, and person is a super class of employee.
What is deadlock? Neither of the transaction can ever proceed with its normal implementation. This situation is known as deadlock.
What is an E-R model? Draw an E-R Diagram for the company database with following Descriptions? The company is organized within departments. Each department has a unique name a
State the data flow diagram of functional model Any action initiated by transition in the state diagram can be extended into an entire data flow diagram in functional model. Th
The scenario You have been approached to design and implement a prototype of a distributed information system for a national car part retail outlet chain. The company comprises
Single Valued Normalisation Codd in the year 1972 formed three normal forms (1NF, 2NF, and 3NF). These were based on functional dependencies between the attributes of a relati
The following variant of the primary copy asynchronous-update replication protocol has been proposed for totally replicated systems. (a) A transaction executing at site A updat
Increased parallelism : Since the replicated date has several copies a query can be distributed or can be answered from the smallest loaded site. Also, with more replicas you have
what is un ordered and ordered file managment?
A distributed transaction consists of subtransactions that execute at different sites and access local DBMSs at those sites. For example, a distributed transaction that transfers m
What is known as a search key? An attribute or set of attributes used to look up records in a file is known as a search key.
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