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1. For an ERP to be successful, what is required by a company before a contract
is signed with the vendor?
Answer:
Actually, there are a number of requirements that the company should consider them
to ensure a successful implementation. First and foremost, the ERP system should fit
the company’s overall strategy and help it serve its customers. Also, company should
avoid choosing a vendor too quickly. Indeed, small businesses should evaluate their
needs carefully and come up with a list of business issues they expect the ERP system
to help them address. Moreover, company should research potential ERP vendors
thoroughly, looking at their reputations in the industry but also checking references
and interviewing previous clients. Additionally, companies should avoiding multiple
vendors if possible, and ensuring that the vendor chosen is appropriate for the small
business’s future growth and expansion plans. Finally, company should read all the
details that listed in the contract, and ensure that project funding is in place before a
contract is signed. Of course, company should discuss and understand each detail to
have a great successful implementation.
2. According to Gretchen Greene’s presentation of STSci, why is the Data
Management System (DMS) Storage Area Network (SAN) in a Private
Cloud? You have five lines to respond to this short answer question.\
Answer )
In fact, cloud computing is a new invention to deliver services. It is for sharing data,
information, software, etc. All these services need to be protected against any hacks
or viruses. Data Management System (DMS) Storage Area Network (SAN) in a
Private Cloud in order to provide all the clients or users with the safest protection they
need. As the guest said, this service is very expensive to renovate. “A Private Cloud
service is defined as a data center server provided, which is used exclusively for your
company and is under the exclusive control of your business and IT administration.
Also, using a Private Cloud cannot raise any particular problems in the field of data
security that are considered too controversial for shared servers.” For instance,
Satellite images, Scientific data, Photographs and video, Radar or sonar data.
*”Software in the Cloud.” MASCH Software Solutions. N.p., n.d. Web. 15 Dec. 2013.
3. Why do IT Infrastructure Server Services revolve around messages?
Answer:)
IT Infrastructure Server Services revolve around messages because they are built on a
layout and groundwork of communication systems. To efficiently operate, the
infrastructure must have each individual device communicating with each other
device using something called a messaging system. The messaging system must have
a well-organized encryption method for security and a standard, common language in
order for each device to properly process the messages.
4. Why are transactions put under the ACID Properties test & ETL?
Answer#1)
In fact, “the ACID model is one of the oldest and most important concepts of database
theory. It sets forward four goals that every database management system must strive
to achieve: atomicity, consistency, isolation and durability.
▪
▪
▪
▪
Atomicity states that database modifications must follow an “all or nothing”
rule. Each transaction is said to be “atomic.” If one part of the transaction
fails, the entire transaction fails. It is critical that the database management
system maintain the atomic nature of transactions in spite of any DBMS,
operating system or hardware failure.
Consistency states that only valid data will be written to the database. If, for
some reason, a transaction is executed that violates the database’s consistency
rules, the entire transaction will be rolled back and the database will be
restored to a state consistent with those rules. On the other hand, if a
transaction successfully executes, it will take the database from one state that
is consistent with the rules to another state that is also consistent with the
rules.
Isolation requires that multiple transactions occurring at the same time not
impact each other’s execution.
Durability ensures that any transaction committed to the database will not be
lost. Durability is ensured through the use of database backups and transaction
logs that facilitate the restoration of committed transactions in spite of any
subsequent software or hardware failures.”
On the other hand, “ETL or Data warehouse testing is categorized into four different
engagements irrespective of technology or ETL tools used:
▪
▪
▪
▪
New Data Warehouse Testing – New DW is built and verified from scratch.
Data input is taken from customer requirements and different data sources and
new data warehouse is build and verified with the help of ETL tools.
Migration Testing – In this type of project customer will have an existing DW
and ETL performing the job but they are looking to bag new tool in order to
improve efficiency.
Change Request – In this type of project new data is added from different
sources to an existing DW. Also, there might be a condition where customer
needs to change their existing business rule or they might integrate the new
rule.
Report Testing – Report are the end result of any Data Warehouse and the
basic propose for which DW is build. Report must be tested by validating
layout, data in the report and calculation.”*2
So, as we can see form the definition and the properties, the transactions put under the
ACID Properties test & ETL because they provide the basic building blocks of any
database transaction model. Also, the databases will be rolled back based on the
transaction success.
*1 Chapple, Mike. “The ACID Model” <
http://databases.about.com/od/specificproducts/a/acid.htm>
*2 “ETL Testing / Data Warehouse Testing – Tips, Techniques, Process and
Challenges”
5. What implications are there when software is offered as a service in a cloud
computing environment? How many data centers in the cloud would an
enterprise need and why?
Answer#1)
When software is offered as services, it is true that there are some ideas of some
implications over a cloud computing. Usually cloud providers make use of public
cloud resources to generate their practical private cloud so as to make cloud
computing admission the scalable computing resources as well as IT services. SaaS is
one of the service which is known as delivery models where of software as a service
will modify the way populace build, sell, buy and also uses software. In this model
Software is offered as a service where cloud user can be able to access the software
from his web browser devoid of the apprehension of deployment or even installation
and also maintenance.
On the other side cloud user can run request or even software with no honest costs or
even investment in database, servers and also software licensing With the arrival of
Web 2.0 data & aster HTML 5 standards, graphically rich request can be run
smoothly at 60 Frames per one second immediately like running our software on our
own individual computers. This is because this service model portrays one to many
purpose as single request running as a service on the server side with many customer
end users can run it from their web browser concurrently as they are linked as
services.
6. How do goals, objectives, and business rules interrelate and differ? Give a
good and a bad example of each.
When an individual have something he wants to achieve, it is vital to come up with
both goals as well as objectives. Once he learns the dissimilarity between goals as
well as objectives, he will understand that how significant it is that you have both of
them. Goals devoid of objectives can never be skillful while objectives devoid of
goals will never get you to where you want to be. The two ideas are separate but
related. On the other hand, business rule are some strategies that are set as a business
goal of objective so that the business may be victorious. A good example is coca cola
Company setting its goal to be the world leading company in drinks while a bad
example of both goal and objectives is a situation whereby an individual plans for his
goal and fail to achieve it due to some circumstances. In this case goal as well as
objective both fail and become a history.
7. How does unstructured and semi-structured data contribute to BI? Where does
this data come from?
Answer#2
It affects the way data is arranged. The data can be analyze and procedure into
information obliging to the decision-making process. This data comes from the
dissimilar forms whereby they can be used during some processes.
However, BI technologies are capable of handling large amounts of unstructured data
to help identify, develop and otherwise create new strategic business opportunities.
The goal of BI is to allow for the easy interpretation of these large volumes of data.
Identifying new opportunities and implementing an effective strategy based on
insights can provide businesses with a competitive market advantage and long-term
stability
8. Explain why architectures are designed in layers.
Answer#1
“The decomposition o the information system into different layer facilitates
understanding of how the system works and provides loose coupling to make system
design and maintenance easier. Also, division into layers makes the system more
scalable since it is easier to add more components to a particular layer as needed. For
example, you add easily more computers to the presentation layer to serve more
users.”*1(p:384)
*1Giachetti, Ronald E. Design of Enterprise Systems: Theory, Architecture, and
Methods. Boca Raton, FL: CRC, 2010. Print.
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