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What is Interaction Diagram
An interaction diagram shows an interaction, comprises of a set of objects and their relationships including the messages that may be dispatched between them. These diagrams could be used to model dynamic aspect of system. It contains sequence diagrams and collaboration diagrams. Here we will discuss two interaction diagrams i.e. sequence diagrams and collaboration diagrams.
Boyce-Code Normal Form (BCNF) A relationship is said to be in BCNF if it is already in 3NF and the left hand side of each dependency is a candidate key. A relation who is in 3N
Question: (a) What are decision support systems, and what role do they play in the business environment? (b) Data mining is a knowledge discovery process of automated extr
What is a database? Database - Basically in simple terms A database is a collection of inter related data and/or information stored so which it is available to several users
To do the division operation R1 ÷ R2, R2 should be a correct subset of R1. In the following example R1 have attributes A and B and R2 have only attribute B so R2 is a correct subse
Sequential File Organisation The most necessary way to organise the collection of records in a file is to use sequential Organisation. Records of the file are stored in series
random file sharing
Why 'AS' clause is used in SQL ? 'As' clause is used for Rename operation. ‘AS' clause is used in SQL for rename operation. (e.g., SELECT ENO AS EMPLOYEE_NO FROM EMP)
Describe different steps of the object-oriented design process. The broad steps of the object-oriented design process are: a. Define context and modes of use of the system
What is average response time? The average response time is that the average time for a transaction to be done after it has been submitted.
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