JPO is a framework for persistence (storage and retrieval) of domain (or data) objects in Java-based database applications. The object/relational impedence missmatch is widely regarded as a complex problem with no easy solution.
Cars changed overtime by people who wanted bigger cars or faster cars. People started to make plans for better cars, tested them and see if they people liked it. Cars are stil â¦ l changing today.
By making radical year-to-year design changes, Detroit automakers encouraged consumers to scrap older cars to buy the latest models, even as often as once a year. On average, 4.5 million cars were junked every year during the 1950s. By 1960, Americans owned more cars than all the rest of the world put together. 33