DATABASE SOLUTIONS (2nd Edition)
THOMAS M CONNOLLY & CAROLYN E BEGG
SOLUTIONS TO REVIEW QUESTIONS
Chapter 1 Introduction- Review questions
1.1 List four examples of database systems other than those listed in Section 1.1.
Some examples could be: • A system that maintains component part details for a car manufacturer; • An advertising company keeping details of all clients and adverts placed with them; • A training company keeping course information and participants’ details; • An organization maintaining all sales order information.
1.2 Discuss the meaning of each of the following terms:
(a) data
For end users, this constitutes all the different values connected with the various
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• A significant client side administration overhead.
By 1995, a new variation of the traditional two-tier client-server model appeared to solve these problems called the three-tier client-server architecture. This new architecture proposed three layers, each potentially running on a different platform:
1) The user interface layer, which runs on the end-user’s computer (the client).
2) The business logic and data processing layer. This middle tier runs on a server and is often called the application server. One application server is designed to serve multiple clients.
3) A DBMS, which stores the data required by the middle tier. This tier may run on a separate server called the database server.
The three-tier design has many advantages over the traditional two-tier design, such as:
• A ‘thin’ client, which requires less expensive hardware. • Simplified application maintenance, as a result of centralizing the business logic for many end-users into a single application server. This eliminates the concerns of software distribution that are problematic in the traditional two-tier client-server architecture. • Added modularity, which makes it easier to modify or replace one tier without affecting the
That means that with the network operating system we can have lots of users all concurrently using resources on our serve.One of the most important aspects about server operating systems is the security. Workstation OS provides great security for end-users, but it's still not as tight as the security offered by the network operating systems. The reason for that is that with the network operating system were providing services to hundred or thousands of concurrent users. Therefore security is critical Workstation operating systems also provide some type of authentication by using user names and passwords which reside on local database on the local
Review Questions for Mid-Term 1) What constitutional clause allows laws enacted by the federal government to take priority over conflicting state laws?
The intent of this paper is to design and propose a database management system solution to Grandfield College for tracking software installed. I have analyzed the organizational issues and needs and developed conceptual, logical, and physical designs of DBMS solution. In order to implement the solution, substantial research had been done on best practices in design, available products, and the legal and ethical standards to which we must adhere during design. This paper includes Business rules, Conceptual, Logical, and Physical database designs, Recommendations on best DBMS required for Grandfield College, Data model, Legal
This is any music since industrialization in the mid-1800s that is in line with the tastes and preferences of the middle class.
I think homemade bomb crime scenes are increasing because of the opportunities we now have. This includes the internet, which tells us how to make the bomb, and stores that sell and/or produce the supplies for making the bombs.
In a client and server caches, an each server cache is managed in one distributed system tier by a number of server members, usually cache server processes. In a separate tier, clients maintain their own caches that automatically call upon the server side to set off cache to update the server with client updates. In addition, the clients can member to server events using both data key specifications and queries. The client/server topology can be extended to any number of tiers.
I have chosen the three-tier design, the user interface runs on the client and the data is stored on the server. A three-tier design also has a middle layer between the client and server that processes the client requests and translates them into data access commands (Shelly-Rosenblatt, 2012).
Review questions are designed to help you study for exams. They are not intended to cover every question that may be on the exam. Questions on the exams may be over any of the material covered in class lectures and in your reading assignments. Review questions are arranged by topic, not by exam. Refer to the Lecture Schedule and your class notes for topics that will be covered on a specific exam.
The application layer: this layer allows different applications to communicate with each other’s. In order to exchange different data over the network connection, the protocols included in this layer set up the standards such as DNS, HTTP, FTP. The data coded in this layer will be encapsulated to transport layer for further packing.
The database used should be open and industry standard to allow easy integration with other applications and easy movement of data in the future. The database
(4) Platform as a Service - This offers a development environment as a service. You can use this technology to develop your own applications that run on the providers server.
Article: Carroll, J. (2002). Play Therapy: the children’s views, Child and Family Social Work, 7, pg 177-187
ESL Inc. has tasked me with the project of finding a new database system that will better meet the needs of their growing customer base. ESL is a large company that has been using a series of spreadsheets and access databases, and manual records to track their business and they are currently looking for a better way to streamline the inner workings of their business. After evaluating their current system, it is apparent, that if a decision to move forward hadn’t taken place within the next few months, their current system would start to fail, as they are reaching capacity in memory used and bandwidth running the various individual instances of Access on their network.
“Imagine a person on a desktop computer who uses Microsoft Access to load up a list of personal addresses and phone numbers that he or she has saved in MS Windows “My Documents” folder. This is an example of a one-tier database architecture” (Windowsecutity.com) “A two tier client/server architecture is one in which a user interacts through a Graphical User Interface to communicate with the database server across a network via Structured Query Langauage.” (Windowsecurity.com) Last is an N-Tier Clinet/Server Architecutre. “Most n-tier database architectures exist in a three-tier configuration. In this architecture the client server model expands to include a middle tier (business tier) which is an application server that houses the business logic. This middle tier relieves the client application and the database server of some of their processing duties by translating client calls into database queries and translating data from the database into client data in return.” (windowsecurity.com)
Even more deploying an application is also quite easier because only a single software has to be installed on the terminal server as against having to install on every individual computer. Furthermore, apart from the extra cost and stress in deploying applications in a non-terminal services environment, another massive advantage provided by terminal services is Application updating, in the case of a line of business application that requires frequent updating and repairs, because it is only carried out on a single computer, time and cost in saved. Another way terminal services reduces cost of ownership is because it supports the use of thin clients or older hardware to be used as terminal clients, which to run the same applications in a non-terminal services environment would have required the older hardwares to be upgraded as they are not capable of running new windows applications. Other benefits of terminal services include: