Which of the following phases of web development begins after a website has been designed, developed, and launched??
A. ?Compilation
B. ?Maintenance
C. ?Debugging
D. ?Alpha testing
Answer: B
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Answer the following statements true (T) or false (F)
1) A GUI allows the user to interact with the program visually. 2) A ComboBox can display info and also have the user input info. 3) A Label allows input to be typed into it. 4) ListBoxes and ComboBoxes are the same other than the fact that ComboBoxes have a drop-down list.
Describe the relations that would be produced by the following tuple relational calculus expressions:
(a) {H.hotelName | Hotel(H) ? H.city = ‘London’} (b) {H.hotelName | Hotel(H) ? (?R) (Room(R) ? H.hotelNo ? R.hotelNo?? R.price ?50)} (c) {H.hotelName | Hotel(H) ? (?B) (?G) (Booking(B) ? Guest(G) ? H.hotelNo ? B.hotelNo?? B.guestNo = G.guestNo ?? G.guestName = ‘John Smith’)} (d) {H.hotelName, G.guestName, B1.dateFrom, B2.dateFrom | Hotel(H) ? Guest(G) ? Booking(B1) ? Booking(B2) ? H.hotelNo ? B1.hotelNo?? G.guestNo = B1.guestNo ?? B2.hotelNo = B1.hotelNo ? B2.guestNo = B1.guestNo ?? B2.dateFrom ? B1.dateFrom}
In the statement b=a*(c/d)+e which is the first operation that is performed when this C++ statement is executed?
A. b= B. d+e C. a*c D. c/d
Suppose A is an inner class in Test. A is compiled into a file named _________.
a. A.class b. Test$A.class c. A$Test.class d. Test&A.class