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ISDS 406 Chapter 8 a questions with complete solutions 2024
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ISDS 406 Chapter 8 a questions with complete solutions 2024
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ISDS 406 Chapter 8architecture design - correct answer ✔- The plan for how information system
components will be distributed across multiple computers and what hardware,
operating system software, and application software will be used on each
computer
architectural components - correct answer ✔software and hardware
All Software System - correct answer ✔Four basic functions:
1. Data storage: are the data entities documented in ERD
2. Data Access Knowledge: the processing required to access data (SQL)
3. Application logic: logic documented in the DFDs, uses cases and functional
requirements
4. Presentation logic: the display information to the user
-----> These four functions are the basic building blocks of any information
system.
Hardware Components of a system - correct answer ✔Three components:
1. Client computers: input-output devices employed by the user (laptops,
desktops, handheld devices)
2. Server: larger multi-user computers
3. Network: connects the computers
Client-server architectures - correct answer ✔- Attempt to balance the
processing between client devices and one or more server devices diagram
on page 283 If the client shown in Figure 8-1 contained
- Client contains all or most of the application logic---> thick or fat client
, - Client contains just a small portion of the application logic----> thin client. Are
more popular because of lower overhead and easier maintenance.
Client-server architectures have four important benefits - correct answer ✔1.
Scalable: easy to INCREASE or DECREASE the storage and processing
capabilities of the servers
2. Support many different types of clients and servers (combining windnows
and macs)
3. Simple to clearly separate the presentation logic, the application logic, and
the data access logic and design each to be somewhat independent
4. Failed server can be swapped out and replaced and the applications can
then be restored.
MIddleware - correct answer ✔a type of system software
designed to translate between different vendors' software
middleware
Client Server Tiers - correct answer ✔- Many ways in which the application
logic can be partitioned between the client and the server.
Two-tiered Architecture - correct answer ✔- Used only two sets of
computers: clients and servers.
- Server is responsible for the data and the client is responsible for the
application and presentation.
Three-tiered architecture - correct answer ✔- Use three sets of computers
1. The software on the client computer is responsible for presentation logic
2. An application server(s) is responsible for the application logic
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