Lecturer: Mr. Tri Djoko Wahjono, Ir, M.Sc.
By: Veronica Ong (1701317660) of class 01PCT
Task: Chapter Review of Chapter 10 from the Textbook Discovering Computers.
1. What is a
database, and how does a database interact with data and information?
A database is a collection of data organized in a manner
that allows access, retrieval, and use of that data. Data is a collection of
unprocessed items, which can include text, numbers, images, audio, and video.
For example, you can type text on a keyboard, talk into a computer’s
microphone, transfer photos taken with a digital camera to a computer, and
capture motion and sounds with a video camera and store the recordings on a
computer.
Information is processed data; that is, it is organized,
meaningful, and useful. In addition, to documents, information can be in the
form of audio, images, and video. For example, voice communications can be sent
in an e-mail message for a family member, friend, or coworker to hear. You can
post photos taken with a digital camera on a Web page for others to view. With
a Web cam, others can see you in real time during a conference call.
Computers process data in a database into information. A
database at a school, for example, contains data about its students and
classes. When a student is admitted to a school, for example, contains data
about its students and classes. When a student is admitted to a school, an
admissions department clerk enters several data items into a computer. The
clerk also uses a digital camera to photograph the new student. This photo,
along with the other entered data, is stored in a database on a server’s hard
disk. A computer at the school then processes the new student data and sends
advising appointment information to a laser printer and student ID card
information to an ID card printer. The student ID is encoded on a magnetic
stripe on the back of the ID card.