Explain the relational model and its major components
What will be an ideal response?
The most successful DBMS model in present day information systems in the relational model that was introduced before object-oriented technologies. A relational DBMS, by hiding the physical structure of data, presents a logical view of the database organization and provides the basis for using a high-level language for database management.
In the relational model, a table is the basic organizational unit for data. A table is a rectangular and flat arrangement of data, composed of attributes (or columns) and entities (or rows). The intersection of a column and a row is known as a cell. A primary key is an attribute or a set of attributes whose values uniquely identify a row. In addition, an entity may have other unique identifiers known as alternate or candidate keys.
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_____ is the secure version of HTTP.
A. SHTTP B. HTMLSec C. HTTPS D. HTMLS
Which sentence is expressed correctly?
A) Employers look for candidates who participated in extra-curricular activities while completing their schooling. B) Employers look for candidates who participated in extracurricular activities while completing their schooling. C) Employers look for candidates who participated in extra curricular activities while completing their schooling.
If workplace solidarity is low and workers have more of an individual identity rather than ________, job dissatisfaction is not likely to translate into pro-union support.
What will be an ideal response?
When computers did not have operating systems, every application had to build everything from scratch
Indicate whether the statement is true or false