Thin Client vs Fat Client
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Questions and Answers

In a client/server architecture, the client is a powerful computer that provides a service.

False

Application partitioning is the process of placing an entire application code in a single location.

False

One of the advantages of application partitioning is decreased performance.

False

In a Web application, the DBMS activities are part of the GUI interface.

<p>False</p> Signup and view all the answers

A Web server is a type of database server.

<p>False</p> Signup and view all the answers

The presentation layer is responsible for managing database operations.

<p>False</p> Signup and view all the answers

A thin client is a type of client that manages most of the application logic.

<p>False</p> Signup and view all the answers

The main advantage of client/server architecture is the reduction of interoperability.

<p>False</p> Signup and view all the answers

A fat client is responsible for processing only the presentation logic.

<p>False</p> Signup and view all the answers

In a thin client architecture, the client is responsible for processing most of the application logic.

<p>False</p> Signup and view all the answers

A two-tier client-server environment can have processing logic only at the client side.

<p>True</p> Signup and view all the answers

Middleware is a software that allows an application to interoperate with other software without requiring user to understand and code low-level operations.

<p>True</p> Signup and view all the answers

In a three-tier client-server environment, processing logic is only at the web server.

<p>False</p> Signup and view all the answers

API stands for Application Program Interface.

<p>True</p> Signup and view all the answers

The database server hosts the web server.

<p>False</p> Signup and view all the answers

The web browser is a server-side component.

<p>False</p> Signup and view all the answers

ODBC is a common web API.

<p>False</p> Signup and view all the answers

A web application can have a database server, web server, and application server.

<p>True</p> Signup and view all the answers

JDBC is a Python API for database access.

<p>False</p> Signup and view all the answers

A 3-tier application involves multiple database updates.

<p>True</p> Signup and view all the answers

In a three-tier architecture, information flow can include server-side processing and database access.

<p>True</p> Signup and view all the answers

Stored procedures are used to improve security in a database.

<p>False</p> Signup and view all the answers

Connection pooling is used to improve database performance.

<p>True</p> Signup and view all the answers

Middleware is used to connect to a database in a 3-tier application.

<p>True</p> Signup and view all the answers

Study Notes

Client-Server Architectures

  • A networked computing model where processes are distributed between clients and servers.
  • A client is a workstation (PC, smartphone, tablet) that requests and uses a service.
  • A server is a powerful computer (PC/mini/mainframe) that provides a service.

Fat Clients vs. Thin Clients

  • A fat client is a client PC that is responsible for processing presentation logic, extensive application and business rules logic, and many DBMS functions.
  • A thin client is an application where the client (PC) accessing the application primarily provides the user interface and some application processing, usually with no or limited local data storage.

Logic Distributions

  • In two-tier client-server environments, processing logic can be at the client (fat client), server (thin client), or both (distributed environment).
  • In three-tier and n-tier client-server environments, processing logic will be at the application server or Web server.

Web Application Components

  • Database server: hosts the DBMS (e.g., Oracle, SQL Server, Informix, MS Access, MySql).
  • Web server: receives and responds to browser requests using HTTP protocol (e.g., Apache, Internet Information Services (IIS)).
  • Application server: software building blocks for creating dynamic Web sites (e.g., MS ASP.NET framework, Java EE, PHP).
  • Web browser: client program that sends Web requests and receives Web pages (e.g., Internet Explorer, Mozilla Firefox, Apple Safari, Google Chrome).

Information Flow in a Three-Tier Architecture

  • Has server-side processing, including database access.
  • Information flows from the Web browser to the Web server, then to the application server, and finally to the database server.

Middleware and APIs

  • Middleware: software that allows an application to interoperate with other software without requiring the user to understand and code low-level operations.
  • API: Application Program Interface, routines that an application uses to direct the performance of procedures by the computer's operating system.
  • Common database APIs: ODBC, ADO.NET, JDBC.

Steps for Using Databases via Middleware APIs

  • Identify and register a database driver.
  • Open a connection to a database.
  • Execute a query against the database.
  • Process the results of the query.
  • Repeat steps 3-4 as necessary.
  • Close the connection to the database.

Considerations in 3-Tier Applications

  • Stored procedures: code logic embedded in DBMS, improves performance, but is proprietary.
  • Transactions: involve many database updates, either all must succeed, or none should occur.
  • Database connections: maintaining an open connection is resource-intensive, use connection pooling.

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Description

This quiz covers the differences between thin clients and fat clients, including their roles in processing and data storage. It explains how thin clients provide user interfaces and limited application processing, whereas fat clients handle extensive application and business rules logic.

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