Identify possible use cases and actors.
What will be an ideal response?
Actors might include Student, Instructor, Registrar, Advisor, and Cashier. Use cases might include Register for Course, Process Payment, Create Course Schedule, Assign Instructor, Print Course Roster, and Pay Tuition.
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Answer the following statements true (T) or false (F)
1. Program documentation includes the system documentation for the program; it also describes the steps of the algorithm. 2. Top-down design is a method whereby a problem is divided into subproblems until only the simplest of subproblems are left. 3. A structure chart shows the order in which the steps of an algorithm are to be carried out. 4. The main program is a function called by the operating system. A function can call other functions. (True) 5. If a function returns no value, then the type of the function is void.
Consider a schema with the attribute set ABCDFG and the following FDs:
AB --> CD, BC --> FG,A --> G, G --> B, C --> G. (a) Find a minimal cover of this set of FDs. (b) Is the decomposition of the previous schema into ABCD and CFG lossless?
Which of the following programs displays a "passing grade" message if the score is 60 or above?
A. Display "Enter a test score: " Input testScore If testScore > 60 Then Display "That is a passing grade." End If Display "End of program." B. Display "Enter a test score: " Input testScore If testScore ==60 Then Display "That is a passing grade." End If Display "End of program." C. Display "Enter a test score: " Input testScore If testScore <=60 Then Display "That is a passing grade." End If Display "End of program." D. Display "Enter a test score: " Input testScore If testScore >=60 Then Display "That is a passing grade." End If Display "End of program."
A(n) ____________________ service allows users to sign on to many different Web sites using a single, common digital identity.
Fill in the blank(s) with the appropriate word(s).