Why is the performance of a computer so dependent on a range of technologies such as semiconductor, magnetic, optical, chemical, and so on?
What will be an ideal response?
Consider a computer’s memory that uses the widest range of technologies. In an ideal world, a computer would have a large quantity of low?cost, very fast, non?volatile memory. Unfortunately, fast memory such as DRAM is expensive and volatile. Non?volatile memory such as magnetic disk is (usually) slow and cheap. Real computers use a combined memory system that makes the computer appear as if it really did have fast, cheap non?volatile memory. That is, by combining memories fabricated with different technologies, the computer manufacturer can hide the negative characteristics of specific technologies.
The fastest memory is cache (usually fast static semiconductor RAM) used to hold frequently?used data. The
bulk of the immediate access memory is normally DRAM (typically 4 Gbyte today). This semiconductor dynamic
memory holds data and working programs, but is volatile and DRAM must be loaded from disk. A hard disk that
stores data by magnetizing the surface of a platter holds programs that are archived and that have to be loaded
when the user requires them. The hard disk drive is very slow but non?volatile.
Flash memory is non?volatile semiconductor memory used to hold semi?fixed data (e.g., the BIOS) and CD/DVD is optical memory designed to allow interchangeable media.
Semiconductors themselves are the result of complex technological processes. Even the structure and chemical composition of transistors change. New materials are constantly emerging for use in display systems.
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Health information management is a rapidly-growing sector that directly affects health carecosts. Every specialized area has its own vocabulary, and health information management isno exception. Conduct an Internet search to learn about Electronic Medical Records (EMR),Computerized Provider Order Entry (CPOE), and a Clinical Decision Support System(CDSS). Describe your findings, using non-technical language that is easy to understand.
What will be an ideal response?
What’s the purpose of adding editable metadata?
What will be an ideal response?
(Account Class) Create an Account class that a bank might use to represent customers’ bank accounts. Include a data member of type int to represent the account balance. [Note: In subsequent chapters, we’ll use numbers that contain decimal points (e.g., 2.75)—called floating-point values— to represent dollar amounts.] Provide a constructor that receives an initial balance and uses it to
ini- tialize the data member. The constructor should validate the initial balance to ensure that it’s greater than or equal to 0. If not, set the balance to 0 and display an error message indicating that the initial balance was invalid. Provide three member functions. Member function credit should add an amount to the current balance. Member function debit should withdraw money from the Account and ensure that the debit amount does not exceed the Account’s balance. If it does, the balance should be left unchanged and the function should print a message indicating "Debit amount exceed- ed account balance." Member function getBalance should return the current balance. Create a program that creates two Account objects and tests the member functions of class Account. What will be an ideal response?
You cannot use a while loop for indefinite loops.
Answer the following statement true (T) or false (F)