The first argument to method showMessageDialog specifies ________.
a. the title.
b. the message.
c. the icon.
d. the parent window.
d. the parent window.
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Theoretically, clients do not need to see the _________ of classes from which they derive other classes.
a. Header files. b. Source code. c. Object code. d. Interface.
The plot in Figure 2.1 shows that Internet growth did not start until after 1995. Why is the figure misleading?
What will be an ideal response?
Using the UML graphical notation for object classes, design the following object classes, identifying attributes and operations. Use your own experience to decide on the attributes and operations that should be associated with these objects.
• a messaging system on a mobile (cell) phone or tablet • a printer for a personal computer • a personal music system • a bank account • a library catalogue
Discuss the structure of a crontab file and the guidelines for configuring its fields.
What will be an ideal response?