An unusual advertisement on your computer screen that pops up is usually caused by ________
A) adware or spyware
B) a Trojan horse
C) keystroke loggers
D) antivirus software
A
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A(n) ____ anomaly occurs when a user cannot add data to a database unless it is preceded by the entry of other data.
A. deletion B. update C. addition D. insertion
The default selection mode for a JList component is:
A) single selection B) single interval selection C) multiple interval selection D) There is no default setting.
After the following program is finished, how many bytes are written to the file t.dat?
``` import java.io.*; public class Test { public static void main(String[] args) throws IOException { DataOutputStream output = new DataOutputStream( new FileOutputStream("t.dat")); output.writeChar('A'); output.close(); } }``` a. 2 bytes. b. 4 bytes. c. 8 bytes. d. none of the above.
Create and print the COMPUTER statechart diagram. There are two columns of states. In the left column, include the following states from the top to the bottom: NEW COMPUTER, CLEANING COMPUTER, and RECYCLED COMPUTER. In the right column, include the following states from the top to the bottom: INSTALLED COMPUTER, FUNCTIONAL COMPUTER, and REPAIR HELD COMPUTER. Add the following transitions:
a. Start with COMPUTER RECEIVED going from a point in space above the state rectangle into the NEW COMPUTER state. b. COMPUTER INSTALLED from the NEW COMPUTER state to the INSTALLED COMPUTER state. c. SOFTWARE INSTALLED from the INSTALLED COMPUTER state to the FUNCTIONAL COMPUTER state. d. MAINTENANCE SCHEDULED from the FUNCTIONAL COMPUTER state to the CLEANING COMPUTER state. e. MAINTENANCE COMPLETE from the CLEANING COMPUTER state to the FUNCTIONAL COMPUTER state. f. PROBLEM REPORTED from the FUNCTIONAL COMPUTER state to the REPAIR HELD COMPUTER state. g. REPAIR COMPLETED from the REPAIR HELD COMPUTER state to the FUNCTIONAL COMPUTER state. h. REFRESH IDENTIFIED COMPUTER from the FUNCTIONAL COMPUTER state to the RECYCLED COMPUTER state. i. UNFEASIBLE REPAIR IDENTIFIED from the REPAIR HELD COMPUTER state to the RECYCLED COMPUTER state. j. An ending arrow from the RECYCLED COMPUTER state to a blank area below the state.