What are the classification of research according to level of investigation?

Answer 1

three levels of data abstraction are:

1. Physical level : how the data is stored physically and where it is stored in

database.

2. Logical level : what information or data is stored in the database (like what is the

datatype or what is format of data.

3.View level : end users work on view level. if any amendment is made it can be

saved by other name.

for the database to be usable it must retrieve data efficently.this efficency led designer to use complex data structure in the database

Answer 2

Physical level: The lowest level of abstraction describes how a system actually stores data. The physical level describes complex low-level data structures in detail.

Logical level: The next higher level of abstraction describes what data the database stores, and what relationships exist among those data. The logical level thus describes an entire database in terms of a small number of relatively simple structures. Although implementation of the simple structures at the logical level may involve complex physical level structures, the user of the logical level does not need to be aware of this complexity. Database administrators, who must decide what information to keep in a database, use the logical level of abstraction.

View level: The highest level of abstraction describes only part of the entire database. Even though the logical level uses simpler structures, complexity remains because of the variety of information stored in a large database. Many users of a database system do not need all this information; instead, they need to access only a part of the database. The view level of abstraction exists to simplify their interaction with the system. The system may provide many views for the same database.

Answer 3

Abstraction in computers stands for isolating ideas from certain occurrences of those ideas in operation. There are 3 levels of data abstraction: 1)physical level 2) logical level 3)view level.

Answer 4

Level of research abstraction is done following steps

1-clear about abstract topic.

2-type of writting which creat interest on full topic.

3-indicated all type of research criteria such hyphothesis,objective,approach ,finding,important,conclusion.

4-abstract in short form in a clarity way.

5-do not use any staistcal symbols.

6-create interesting readability.

7-prepare in a specific manner.

Answer 5

French categorizes research according to the levels of investigation into exploratory research, descriptive research, and experimental research.

a