Douglas Adu
Professor Nada AlSallami
CS101-SP-2019
Extra-Work from Chapter-12 (10 points)
Due date: May 8th, 11:59 pm
1. What is electronic commerce?
It means buying and selling of goods and services via the internet. It is a
commence supported by IT.
2. Describe the three primary components of a database management system.
I. The physical database – a collection of files that contain the data
II. The database engine – software that supports access to and modification of
the database content.
III. The database schema – a specification of the logical structure of the data
stored in the database.
3. What is an information system?
It is defined as a set of interrelated components which includes the collection of
data, processing, storing and dissemination of data and information which
results in the accomplishment of goals.
4. Describe the process of what-if analysis in spreadsheets.
The spreadsheet is dynamic since any changes in the data modify the
appropriate calculations.
It can accept the assumed values, and the values can be modified to notice how
they affect the other data related to it. That is known as what if analysis.
Since the spreadsheet is dynamic, it is used to perform what-if analysis.
For instance, suppose an organization planned to conduct a program for
collecting the funds to help blind students.
The organization wants to maintain the details of this scenario such as the
number of people who are attending the program, price of the ticket, rent of the
room, duration of the program, cost of snacks in a spreadsheet.
The organization wants to know how the scenarios will affect if some details are
changed.
For example,
What if the number of people who are attending the program increase by 30%?
What if the rent of the room increased by $500?
What if the cost of snack decreased by 8%?
After encountering such questions, the data are changed according, which in
turn affects the data which are related to it.
5. Describe the Structured Query Language (SQL).
It is a comprehensive database language for managing relational databases. It
includes statements that specific database schemas as well as statements that
add, and delete data content. Also, as its name implies, SQL provides the ability
to query the database to retrieve specific data. The original version of SQL was
Sequal, developed by IBM in the early 1970s. In 1986, the American National
Standard Institute (ANSI) published the SQL standard, which serves as the basis
for commercial database language for accessing a relational database. SQL is
not case sensitive, so keywords, table names, and attribute names can be
uppercase, lowercase, or mixed case. Spaces are used as separators in a
statement. Because it is a specific programming language, so we use a
monospaced code font.
6. What is the biggest remaining challenge for e-commerce?
It is the need to ensure security in the financial transactions inherent in the
process.
7. What is SQL?
It stands for Structured Query Language.
It is a comprehensive rational database language for data management and
queries.
8. Describe the three primary components of a database management system.
I. The physical database – a collection of files that contain the data
II. The database engine – software that supports access to and modification of
the database content.
III. The database schema – a specification of the logical structure of the data
stored in the database.
9. True or False? The key of a database table can be composed of more than one
field.
True
10. True or False? Whenever possible, a constant value should be used in a
spreadsheet instead of a formula.
False