livingmylivetothefullest

It's about life

Answer of Mr. Tri Djoko Assignment Chapter 10

True/False

  1. True
  2. True
  3. False
  4. True
  5. False
  6. False
  7. True
  8. True
  9. False
  10. True

Multiple Choice

  1. B
  2. A
  3. D
  4. B
  5. A
  6. B
  7. B
  8. A

Matching

  1. E
  2. G
  3. C
  4. B
  5. J
  6. A
  7. I
  8. D
  9. H
  10. F

Short Answer

  1. Validation is the process of comparing data with a set of rules or values to find out if the data is correct.Five types of validity checks are alphabetic checks, numeric checks, range checks, consistency checks, and completeness checks.
  2. Data redundancy a weakness of file processing systems because data redundancy means same information is duplicated in several files. This makes data redundancy.Isolated data a weakness of file processing systems because data are scattered in various files, and the files may be in different format, writing new application program to retrieve data is difficult
  3. Database approach is a approach whereby a pool of related data is shared by multiple application programs; offers significant advantages over traditional file-based approachReduced Data Redundancy — Most data items are stored in only one file, which greatly reduces duplicate data. Improved Data Integrity — When users modify data in the database, they make changes to one file instead of multiple files. Shared Data — The data in a database environment belongs to and is shared, usually over a network, by the entire organization. Easier Access — The database approach allows nontechnical users to access and maintain data, providing they have the necessary privileges. Reduced Development Time — It often is easier and faster to develop programs that use the database approach.
  4. I might use a Simple Query Wizard for a query that searches for and lists students in an unversity.Query by Example (QBE) is a database query language that has a graphical user interface to assist users with retrieving data.
  5. Object-oriented databases have several advantages : they can store more types of data, access this data faster, and allow programmers to reuse objects.A multimedia database stores images, audio clips, and/or video clips. A groupware database stores documents such as schedules, calendars, manuals, memos, and reports. A computer-aided design (CAD) database stores data about engineering, architectural, and scientific designs. A hypertext database contains text links to other types of documents.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

Information

This entry was posted on December 20, 2012 by .
December 2012
M T W T F S S
« Nov   Jan »
 12
3456789
10111213141516
17181920212223
24252627282930
31  

Blog Stats

  • 6,909 hits
%d bloggers like this: