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ISDS406 Final Exam – Questions & Detailed Solutions
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ISDS406 Final Exam – Questions & Detailed Solutions
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ISDS406 Final Exam – Questions & Detailed SolutionsThe training for a new system should not focus on all the capabilities/features
of the new system. True/false? Right Ans - True
Training should focus on helping users to accomplish their jobs.
Training should also focus on what the user needs to do, not what the system
can do.
what is a system specification? Right Ans - System specification is the final
deliverable of the design phase. It conveys exactly what system the
development team will implement during the implementation phase
Steps to Create Physical DFD Right Ans - 1. Draw a human-machine
boundary
2. Add implementation references
3. Add system related data stores, data flows and processes
4. Update data descriptions and metadata in the CASE repository
Steps to Create the Physical Database Design Right Ans - 1. Add primary
keys
2. Add intersection tables to replace N:M relationships
3. Add foreign keys to represent relationships
4. Add data types for all fields
Program design Right Ans - Methods and procedure in a software. creating
instructions for the programmers
Structure Chart Right Ans - Shows all components of code in a hierarchical
format and illustrates the organization and interactions of the different
program modules
Q. What is the most common conversion module as listed by the textbook?
Right Ans - Whole-system conversion
What is an abrupt change in conversion style called? Right Ans - Direct
Conversion
What is a stub? Right Ans - A code that serves as a tool for some other
programing functionality. A placeholder for a module that usually displays a
,simple test message on the screen or returns some hardcoded value when it's
selected.
What are the two approaches to unit testing? Right Ans - Black Box:
Focuses on whether the unit meets requirements stated in specification
White Box: Looks inside the module at actual code
What is a direct conversion style? Right Ans - A direct conversion style is
when the new system instantly replaces the old system
What are the pros of Purchased Software? Right Ans - - No need to
"reinvent the wheel" for common business
- tested proven
- lost savings
- time savings
- utilize vendors expertise
- some customization
Cons of Purchased Software Right Ans - rarely fits, organizational process
must adapt to software reliance on vendor for maintenance and future
enhancement, wont development in-house functional and technical skills
Requires significant time and effort
may add to existing backloss
may require skills we do not have
often cost more
more calendar days
risk of project failure Right Ans - Cons of Custom Software
unique solutions created for strategic advantages
Build retain technical skills and function knowledge in house
new system built with existing technology and standards Right Ans - Pros
of Custom Software
They should choose to Outsource the project to a third party that specializes
in that. Right Ans - If an organization wants to implement a custom system
with unique business needs and do not have technical expertise in-house,
which of the three acquisition strategies should they pursue?
,What is an RFQ? Right Ans - A standard business process that is designed
to invite suppliers to bid for a service or product. In another words, this is an
invitation to bid. An RFQ (Request for Quote) is used when a list of equipment
is so complete that it's just a matter of asking the vendor how much it will
cost.
What are three acquisition strategies? Right Ans - Custom Development,
Pre-packaged software, and Outsourcing.
Two major architectural components are... Right Ans - Software and
Hardware
What are the three primary hardware components? Right Ans - Client
Computers, Server, and Network
What are Thin clients? Right Ans - A light weight computer that has been
modify to be able to remote into server based computing. Containing just a
small portion of the application logic ( lower overhead and easier
maintenance.)
Request for Information
-Used to gather info about products and services offered by vendors. Shorter
and less detailed. Could be used to determine which vendors have the
capability to perform a service.
-For smaller cheaper projects with smaller budgets. Right Ans - RFI
-Solicits for a formal proposal from a potential vendor, developer, or service
provider. Describes the system or service that is needed.
-RFP should include certain key facts that the vendor requires, such as
detailed descriptions of needs, any special technical needs or circumstances,
evaluation criteria, procedures to follow, and timetable. Right Ans - RFP
-Client Computers
-Servers
-Network Right Ans - Three primary hardware components:
1. Data Storage: Data to be stored
, 2. Data Access Logic: The processing required to access data, often meaning
database queries in SQL.
3. Application Logic: The logic documented in the DFDs, use cases, and
functional requirements.
4. Presentation Logic: They display of information to the user and acceptance
of the user's commands (the user interface)
These four are the basic building blocks of any information system Right
Ans - Four basic functions of software:
Hardware and Software Right Ans - Two major architectural components
in Architecture Design:
What are the elements of Use Case Diagram? Right Ans - Actor, Use case,
System Boundary and Association Relationship
part of the interface prototype that shows a box outline where elements will
be placed. Right Ans - What is a Wireframe diagram?
It reduces duplicate work and processing time, decreases cost and probability
of error. Examples include: bar code readers, scanners, magnetic stripe
readers Right Ans - What are the benefits of source data automation and
name examples?
a). Heuristic evaluation - Compare design to checklist
b). Walkthrough evaluation -Team simulates movement through components
c). Interactive evaluation -Users try out the system
d) .Formal usability testing - Detailed use of special lab testing Right Ans -
4). What types of evaluations are done during the last step of the User
Interface design process?
A data construct that provides a description of something that may be used by
a computer such as a processor Right Ans - What is an object?
-Unified Modeling Language
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