Unit 6 Questions with complete solution 2024/2025 Unit 6: Data
common database models - correct answer Flat-file, relational, hierarchical, and object-oriented
Database research - correct answer is the act of analyzing and converting data into information that can be used in decision-maki...
Unit 6: Data
common database models - correct answer ✔Flat-file, relational,
hierarchical, and object-oriented
Database research - correct answer ✔is the act of analyzing and converting
data into information that can be used in decision-making.
A typical database application has two major layers - correct answer ✔an
application layer and a database management layer. The application layer
communicates with the end user and can be fairly complex. For example,
when end users access a database through a website, the application layer
consists of programs and services within a server that queries the database
on behalf of the client.
The application layer of a database does not directly manipulate the data.
After the application software receives a request from a user, it uses the
database management system (DBMS) as a tool to obtain the results.
A database table, also known as a datasheet - correct answer ✔- is
composed of records and fields that hold data.
- Data is stored in records. The records are represented as rows in a table
with related information.
- The columns represent fields. A field contains a single piece of data about
the subject of a record.
A flat-file database - correct answer ✔stores data in a plain text file. Each
line of the text file holds one record. Fields are separated by delimiters like
spaces or commas.
The hierarchical database - correct answer ✔is one of the oldest database
models. Data is organized in a tree structure, much like an organizational
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