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- 1. Multiple Choice
Consider the code segment below
What is printed as a result?
int x = 10;
int y = 20;
System.out.print(y + x / y);
1
1.5
3
20
20.5
- 2. Multiple Choice
Which of the following expressions evaluates to 1?
1. 2 / 5 % 3
2. 2 / (5 % 3)
3. 2 / 5 + 1
1 only
2 only
1 and 2 only
2 and 3 only
1, 2, and 3
- 3. Multiple Choice
Consider the following:
int a = 2;
int b = 6;
int c = 3;
Which of the following expressions evaluates to false?
a < b == c < b
a > b == b < c
a < b != c < b
a < b != c < b
- 4. Multiple Choice
Consider the following code segment
boolean a = true;
boolean b = true;
System.out.print((b || (!a || b)) + " ");
System.out.print(((!b || !a) && a) + " ");
System.out.println(!(a && b) && b);
true false false
true true true
true false true
false true false
- 5. Multiple Choice
Consider the following code segment.
String str1 = new String("Happy");
String str2 = new String("Happy");
System.out.print(str1.equals(str2) + " ");
System.out.print(str2.equals(str1) + " ");
System.out.print(str1 == str2);
What is printed as a result of executing the code segment?
true true true
true true false
false true false
false false true
- 6. Multiple Choice
Consider the following code segment, which is intended to store the sum of all multiples of 10 between 10 and 100, inclusive (10 + 20 + ... + 100), in the variable total.
int x = 100;
int total = 0;
while( /* missing code */ )
{
total = total + x;
x = x - 10;
}
Which of the following can be used as a replacement for /* missing code */ so that the code segment works as intended?
x < 100
x <= 100
x > 10
x >= 10
- 7. Multiple Choice
Consider the following code segment.
int a = 1;
String result = "";
while (a < 20)
{
result += a;
a += 5;
}
System.out.println(result);
What, if anything, is printed as a result of executing the code segment?
21
161116
161161
Nothing is printing because of an infinite loop.
- 8. Multiple Choice
Consider the following code segment.
int count = 0;
int number = 20;
while (number > 0)
{
number = number / 2;
count++;
}
What will be the value of count after executing the code segment?
6
5
4
1
- 9. Multiple Choice
Consider the following code segment.
String word = "Computer";
int num = 3;
String result = "";
for (int k = num; k >= 0; k--)
{
result += word.substring(0, k);
}
System.out.print(result);
What is printed as a result of executing the code segment?
comcoc
ccocom
ccocomcomp
comcomcomcom
- 10. Multiple Choice
Consider the following code segment.
int a = 100;
while (a > 1)
{
System.out.println("$");
a /= 2;
}
How many $’s are printed as a result of executing the code segment?
0
5
6
7
50
- 11. Multiple Choice
Consider the following code segment.
String str = "AP";
str += "CS " + 1 + 2;
System.out.println(str);
What is printed as a result of executing the code segment?
CS AP12
AP CS3
CSAP 12
APCS 12
APCS 3
- 12. Multiple Choice
Consider the following code segment.
String one = "ABC123";
String two = "C";
String three = "3";
System.out.println(one.indexOf(two));
System.out.println(one.indexOf(three));
System.out.println(two.indexOf(one));
What is printed when the code segment is executed?
2
5
-1
2
5
2
2
6
-1
-1
-1
2
- 13. Multiple Choice
The code segment below is intended to randomly print one of the values 2, 4, 6, or 8 with equal probability.
int val = /* missing code */ ;
val *= 2;
System.out.print(val);
Which of the following can be used to replace /* missing code */ so that the code segment works as intended?
Math.random() * 4 + 1
Math.random() * 4
(int) (Math.random() * 4)
(int) (Math.random() * 4 + 1)
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