Answer:
when user wants duplicate copy of the object
Explanation:
Encapsulation are one of the key foundations of object-oriented programming (OOP). It involves the bundling of data or information with the methods and various techniques which operate on that data.
It can be used in hiding the true values or state of a structured data object that is in a class, preventing unauthorized parties' direct access to them.
The circumstances that can be allowed in returning a reference to the existing Engine is when user wants duplicate copy of the object.
Answer:
The development of computers from the beginning to what we see now is called the computer generations. It is gradual advancement in the technology in the making of the computer.
Explanation:
The generation in computer technology can be defined as the development or the change in the technology in the computer as it was used. There were five generations of computer development. They were :
1. First Generation computers
In this generation, vacuum tubes was used in the circuits. It dated from 1946 to 1959.
2. Second Generation computers
These are transistors based computers. This generation ranges from 1959 to 1965.
3. Third Generation computers
This generation computers were Integrated circuit based. The generation stared in 1965 and ended in 1971.
4. Fourth Generation computers
The computers of this generation used VLSI microprocessor in the circuits. The period of the 4th generation computers are from 1971 to 1980.
5. Fifth Generation computers
The computers of this generation used ULSI microprocessor in the circuits. The 5th generation computers started from 1980s.
Answer:
a typical consumer, and the CPI is computed and reported by the Bureau of Labor Statistics.
Explanation:
The CPI is a measure of the overall cost of the goods and services bought by a typical consumer , and the CPI is computed and reported by the Bureau of labor statistics. Hence, option C is correct.
