
AP Computer Science Java Practice Exam #2
Quiz
•
Computers
•
9th - 12th Grade
•
Practice Problem
•
Hard
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40 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What is the output of the following program segment?
int num = 5;
while (num >= 0)
{
num -= 2;
}
System.out.println(num);
-2
-1
0
2
21
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What is the output from
int n = 12;
System.out.print(goFigure(n));
System.out.print(" " + n);
where the method goFigure is defined as follows:
public double goFigure(int n)
{
n %= 7;
return (double) (12 / n);
}
2.0 12
2.4 12
2.0 5
2.4 5
2.4 6
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which of the following expressions will evaluate to true when x and y are boolean variables with different values?
I. (x || y) && (!x || !y)
II. (x || y) && !(x && y)
III. (x && !y) || (!x && y)
I only
II only
I and II only
II and III only
I, II, and III
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What is the output from the following code segment?
double x = 5*4/2 - 5/2*4;
System.out.println(x);
0
1
0.0
1.0
2.0
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
What is the output from the following code segment?
String band = "anamanaguchi";
System.out.println(band.substring(1, 4)). compareTo(band.substring(5, 8)));
true
false
0
A negative integer
A positive integer
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Integers can be represented in number systems with different bases. Fr example, 34(decimal) = 22(hexadecimal) = 100010(binary), where the subscripts "dec", "hex", and "bin" indicate the decimal (base 10), hexadecimal (base 16), and binary (base 2) systems, respectively. What are the hexadecimal and binary representations of 49(decimal)?
49(decimal) = 21(hexadecimal) = 110011(binary)
49(decimal) = 31(hexadecimal) = 11001(binary)
49(decimal) = 31(hexadecimal) = 110001(binary)
49(decimal) = 37(hexadecimal) = 110111(binary)
49(decimal) = 61(hexadecimal) = 110001(binary)
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Questions 7-8 refer to the following method
public void printVals(String[] items, int k)
{
if(k > 1)
{
printVals(items, k - 1);
System.out.print(items[k] + " ");
printVals(items, k - 2);
}
}
Suppose the following code segment has been executed.
String[] names = {"Pat", "Joe", "Ann", "Cal", "Amy"};
printVals(names, name.length - 1);
7.What is the output?
Ann Cal Amy Ann
Ann Cal Amy Cal Ann
Ann Cal Joe Amy Joe Ann
Joe Ann Cal Joe Amy Joe Ann
Joe Ann Pat Cal Joe Amy Joe Ann Pat
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