AP CS A Unit 6 Exam PRACTICE

What return statement may be used in p()?

• return 1;

• return {1, 2, 3};

• return int[]{1, 2, 3};

• return new int[3];

• return true;

What does the following method do?

• Returns a count of the number of elements in the array.

• Returns the sum of the values in the array.

• Returns a count of the number of times x appears in the array.

• Returns the average of the values in the array.

• Returns a count of the number of positive elements in the array

Consider the following instance variable and method.

Which of the following replacements for /* missing code */ correctly implements the method printEvenIndices()?

• 
• 
• 
• 
• 

Assume the following method has been defined.

What is output by the following code?

String[] b = {"aardvark", "banana", "cougar", "daikon", "elephant", "fog", "get"};

System.out.println(mystery(b, 5));

• 0

• 2

• 3

• 4

• 5

When you pass an array to a method, the method receives _______.

• a copy of the array

• a copy of the first element

• a copy of the reference to the first element

• a copy of the reference to the array

• the length of the array

What does the following algorithm do?

• Adds 1 to every value in the array.

• Doubles all the values in the array.

• Changes all the values in the array to even numbers.

• Tests if the elements in the array are even or odd.

• Doubles every other value in the array.

Consider the following method.

What is printed when the code above is executed?

• pro

• pprpro

• pprogrpro

• prprograprog

• programprogramprogram

What does the following algorithm do?

• Returns true if each element of the array is less than the element before.

• Returns true if each element of the array is greater than or equal to the element before.

• Returns true if each element of the array is greater than the element before.

• Returns false if each element of the array is greater than or equal to the element before.

• Returns false if each element of the array is greater than the element before.

Consider the following code segment.

Which of the following represents the contents of seq as a result of executing the code segment?

• {0, 0, 0, 0, 0, 0}

• {0, 0, 1, 2, 5, 3}

• {0, 1, 2, 5, 3}

• {1, 1, 1, 1, 1, 1}

• {1, 2, 5, 3, 7, 0}

Consider the following methods which appear within the same class.

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

• 1 2 7 3 5

• 1 7 2 5 3

• 2 1 3 7 5

• 2 7 3 5 1

• Nothing is printed because an ArrayIndexOutOfBoundsException is thrown during the execution of the

  method mystery.