What is system maintenance? List the reasons for systems maintenance.
What will be an ideal response?
Systems maintenance is a stage of systems development that involves changing and enhancing a system to make it more useful in achieving user and organizational goals. Some of the reasons for program maintenance are the following:1. Poor system performance such as slow response time for frequent transactions2. Changes in business processes3. Changes in the needs of system stakeholders, users, and managers4. Bugs or errors in the program5. Technical and hardware problems6. Corporate mergers and acquisitions7. Changes in government regulations8. Changes in the operating system or hardware on which the application runs
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Which of the following statements is false?
a. SecureRandom method ints with two int arguments creates an IntStream for an infinite stream of random int values in the range starting with the first argument and up to, but not including, the second.
b. SecureRandom method ints with a long and two int arguments creates an IntStream with the specified number of random int values in the range starting with the first argument and up to, but not including, the second.
c. To convert an IntStream to a Stream
Answer the following questions true (T) or false (F)
1. If class D is derived from class B then class D has only some of the members from B, and the additional members defined in D. 2. A programmer can use inheritance with an existing library for which only the header file and binary are available, to derive a class more suitable to her purpose.
One way to increase processing speed is to move program instructions and data from memory to the processor more quickly. To help accomplish this objective, many computers contain a block of high-speed __________.
a. ROM b. RAM c. registers d. cache memory
A location in the computer's memory that may contain different values at various times throughout the execution of a program is called a________.
Fill in the blank(s) with the appropriate word(s).