Prepare a diagram 0 DFD for the new system.
What will be an ideal response?
Answers will vary. In Chapter 4, students were asked to draw an FDD showing the main operations described in the fact statement. Answers will vary, but the objective is to have students identify three to five functions that will represent major business processes.
The sample FDD in Chapter 4 identified four primary functions:
? Manage Membership and Charges
? Interface with Accounting System
? Schedule Courses and Activities
? Analyze Sales and Marketing Trends
These four functions can be represented as processes when the context diagram is exploded to diagram 0 DFD.
Sample diagram 0 DFD:
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Which of these statements includes an explicit type conversion operation?
a. x = int(z + 0.5); b. q = sqrt(m – n) / z; c. double z = 2e5; d. const int MAX = 450;
Which of the following sets of statements creates a multidimensional array with 3 rows, where the first row contains 1 value, the second row contains 4 items and the final row contains 2 items?
a.``` int[][] items; items = new int[3][?]; items[0] = new int[1]; items[1] = new int[4]; items[2] = new int[2]; ``` b.``` int[][] items; items = new int[3][]; items[0] = new int[1]; items[1] = new int[4]; items[2] = new int[2]; ``` c.``` int[][] items; items = new int[?][?]; items[0] = new int[1]; items[1] = new int[4]; items[2] = new int[2]; ``` d.``` int[][] items; items[0] = new int[1]; items[1] = new int[4]; items[2] = new int[2]; ```
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Answer the following statement true (T) or false (F)
Answer the following statements true (T) or false (F)
1. External devices are attached to a traditional IBM mainframe through interface boards. 2. On a traditional IBM mainframe, the channel’s instructions are stored in the CCW. 3. On a traditional IBM mainframe, a channel program consists of one or more channel address words. 4. In a traditional IBM mainframe channel program, each CCW contains a command code that specifies the operation to be performed, a data address, a byte count, and several flags. 5. On a traditional IBM mainframe, just before it starts a physical I/O operation, the mainframe operating system places the address of the channel program’s first CCW in the channel address word (CAW).