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AP计算机科学A课程真题

(2018-06-05 14:38:31)
标签：

ap计算机

ap计算机科学a

课程

2015年真题

学习资料

Consider the following incomplete method, which is intended to return the number of integers that evenly divide the integer inputVal. Assume that inputVal is greater than 0.

  1. public static int numDivisors(int inputVal)
  2. {
  3. int count = 0;
  4. for (int k = 1; k <=inputVal; k++)
  5. {
  6. if ( )
  7. {
  8. count++;
  9. }
  10. }
  11. return count;
  12. }

Which of the following can be used to replace so that numDivisors will work as intended?

 
 
 
 
 

 

Consider the following code segment.

  1. for (int r = 3; r > 0; r--)
  2. {
  3. int c;
  4. for (c = 1; c < r; c++)
  5. {
  6. System.out.print("-");
  7. }
  8. for (c = r; c <= 3; c++)
  9. {
  10. System.out.print("*");
  11. }
  12. System.out.println();
  13. }

What is printed as a result of executing the code segment?

 
 
 
 
 

 

Consider the following two classes.

  1. public class A
  2. {
  3. public void show()
  4. {
  5. System.out.print("A");
  6. }
  7. }
  8. public class B extends A
  9. {
  10. public void show()
  11. {
  12. System.out.print("B");
  13. }
  14. }

What is printed as a result of executing the following code segment?

  1. A obj = new B();
  2. obj.show();
 
 
 
 
 

Consider the following method, biggest, which is intended to return the greatest of three integers. It does not always work as intended.

  1. public static int biggest(int a, int b, int c)
  2. {
  3. if ((a > b) && （a > c))
  4. {
  5. return a;
  6. }
  7. else if ((b > a) && （b > c))
  8. {
  9. return b;
  10. }
  11. else
  12. {
  13. return c;
  14. }
  15. }

Which of the following best describes the error in the method?

 
 
 
 
 

Consider the following method.

  1. public static void showMe(int arg)
  2. {
  3. if (arg <</span> 10)
  4. {
  5. showMe(arg+1);
  6. }
  7. else
  8. {
  9. System.out.print(arg + " ");
  10. }
  11. }

What will be printed as a result of the call showMe(0)?

 
 
 
 
 


Consider the following sort method. This method correctly sorts the elements of array datainto increasing order.

  1. public static void sort(int[] data)
  2. {
  3. for ( int j = 0; j < data.length - 1; j++)
  4. {
  5. int m = j;
  6. for (int k = j + 1; k < data.length; k++)
  7. {
  8. if (data[k] < data [m])
  9. {
  10. m = k;
  11. }
  12. }
  13. int temp = data[m];
  14. data[m] = data[j];
  15. data[j] = temp;
  16. }


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