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Structure of Client Server Systems:In client/server architecture, clients show users who require services while servers give services. Both client and server are a combination of hardware & software. Servers are divided logical objects that communicate with clients over a network to do tasks together. A client makes a request for a service & receives a reply to that request. A server gets & processes a request, and sends back the needed response. The client/server systems may have two different types of architecture -
2-Tier and 3-Tier Client/Server Architectures
Each client/server application contains three functional units:
These functional units can reside on either the client or on one or more servers in the application:
Figure: A client-server system
Define the basic operations of the relational algebra? Ans: Basic operators of relational algebra are: 1. Union (∪) - Selects tuples which are in either P or Q or in bot
Question: (a) What are the challenges in the development of Large Scale Distributed Real Systems? (b) What is backward engineering and forward engineering in a design packa
crete a data base relationship model Entity: Students; Professors; Dormitories buildings; Attributes of students: Name; Address; Dorm;
1. Determine the set of minimal functional dependencies for the following data. The local bakery, Happy Cakes, needs your help designing a database that will support a kiosk in
What is data integrity? Ans: It is the data consisted of in database that is accurate and consistent. (Data integrity means that the data should be valid as per to the give
Which file organization provides very fast access to any arbitrary record of a file? Hashed file organization provides very fast access to any arbitrary record of a file.
intent locking
Create an index for the table Client, field CLIENT_NO of Q ? Command: CREATE INDEX client_client_no ON client(client_no);
Selective replication: This is a combination of generating small fragments of relation and replicating them rather than a entire relation. The data should be fragmented on require
Name the various privileges in SQL? A) Delete B) Select C) Insert D) Update
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