Several of the original ports used with desktop computers-such as the parallel ports traditionally used to connect printers-are now considered standard ports.
Answer the following statement true (T) or false (F)
False
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A form contains a button called btnDisplay, and the following code is placed inside btnDisplay’s Click event procedure. At run time, which one of the following cannot possibly be displayed in the message box when the user clicks on btnDisplay?
``` Dim rndNum As New Random() Dim num1 As Integer num1 = rndNum.Next(0, 3) MessageBox.Show(CStr(num1)) ``` (A) 3 (B) 2 (C) 1 (D) 0
Analyze the following code:
``` import javafx.beans.property.DoubleProperty; import javafx.beans.property.SimpleDoubleProperty; public class Test { public static void main(String[] args) { DoubleProperty balance = new SimpleDoubleProperty(); balance.addListener(ov -> System.out.println(2 + balance.doubleValue())); balance.set(4.5); } }``` a. The program displays 4.5. b. The program displays 6.5. c. The program would display 4.5 if the balance.set(4.5) is placed before the balance.addLisnter(...) statement. d. The program would display 6.5 if the balance.set(4.5) is placed before the balance.addLisnter(...) statement.
In general, a class’s data fields should be declared as ______.
a) public b) protected c) private d) package access
A common logic error known as a(n) occurs when the programmer incorrectly specifies a conditional operator, such as < instead of <=.
a) fatal error b) off-by-one error c) syntax error d) None of the above.