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Semester Final CS3 (1/11/2024)
By Mickey Arnold
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Last updated about 2 years ago
16 questions
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Question 1
1.
What is output by the code below?
String[] ray;
ray = new String[4];
System.out.println( ray[0] );
one
two
Question 2
2.
What is output by the code below?
Integer[] ray;
ray = new Integer[4];
System.out.println( ray[3] );
2
3
Question 3
3.
What is output by the code below?
Integer[] ray;
ray = new Integer[4];
ray[1] = null;
ray[0] = new Integer(3);
ray[2] = new Integer(99);
System.out.println( ray[2] );
Question 4
4.
What is output by the code below?
Integer[] ray = {11,55,-4,909};
System.out.println( ray[3] );
0
11
Question 5
5.
What is output by the code below?
Double[] ray = {11.2,55.0,-4.5,909.0};
System.out.println( ray[1] );
55.0
909.0
Question 6
6.
What is output by the code below?
Double[] ray = {11.2,7.2,-4.5,909.0};
ray[1] = new Double(55.0);
System.out.println( ray[1] );
-4.5
11.2
Question 7
7.
What is output by the code below?
Double[] ray = {3.2,5.7,6.3,1.9};
double x = 0;
for( double r : ray )
x += r;
System.out.println( x );
17.1
Question 8
8.
What is output by the code below?
Double[] ray = {3.1,5.2,6.3,1.4};
for( double r : ray )
r = 0;
System.out.println( ray[2] );
0.0
Question 9
9.
What is output by the code below?
String[] ray;
ray = new String[4];
ray[1] = "one";
System.out.println( ray[1] );
0
Question 10
10.
What is output by the code below?
String[] ray;
ray = new String[4];
ray[1] = "one";
ray[2] = "two";
ray[3] = "three";
System.out.println( ray[0] );
Question 11
11.
What do you call the condition that stops recursion?
base case
return
break
Question 12
12.
What is returned the call
fun(6) ?
public static int fun(int x)
{
if(x < 1)
return 1;
else
return x + fun(x - 1);
}
Question 13
13.
What is returned by the call
fun(8) ?
public static int fun(int x)
{
if(x < 1)
return 1;
else
return x + fun(x - 1);
}
Question 14
14.
What is returned by the call
fun(8) ?
public static int fun(int x){
if(x < 1)
return 1;
else
return x + fun(x - 2);
}
Question 15
15.
What is returned by the call
fun(6) ?
public static int fun(int x){
if(x < 1)
return 1;
else
return x + fun(x - 2);
}
Question 16
16.
What is returned by the call
fun(10) ?
public static int fun(int x)
{
if (x < 1)
return x;
else
return x + fun(x - 2);
}
null
three
0
0
null
1
4
0
null
3
99
-4
55
909
-4.5
11.2
0
55.0
909.0
0
17.2
16.4
17.4
16.8
3.1
6.3
5.2
1.4
null
one
three
two
one
0
two
null
three
shut it down
stop
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0
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