Question

QUESTION 5

1. What is printed?

   int[] aArray = {1, 2, 3, 4};

   int[] bArray = {5, 6, 7, 8};
   bArray = aArray;

   System.out.print(bArray[2]);

1 points   

QUESTION 6

1. What is printed?

   public static void main(String[] args)

    {
    int[] aArray = { 1, 2, 3, 4 };
    System.out.print(aArray[2]);

    int i = aMeth(aArray);

    System.out.print(i + "" + aArray[2]);

   }

   public static int aMeth(int[] iArray)

    {
    for (int i = 0; i < iArray.length; i++)

    {
    iArray[i]++;

    }
    int[] bArray = { 5, 6, 7, 8 };

    iArray = bArray;

    return iArray[2];
   }

1 points   

QUESTION 7

1. Assuming that array myList is properly declared and initialized with values, what best describes the following code snippet?

   double max = myList[0];

   for (int i = 1; i < myList.length; i++) {

   if (myList[i] > max) max = myList[i];

   }

   		sets max to the largest index in the array
   		sets max to the index of the largest value in the array
   		sets max to the largest positive value in the array
   		sets max to the largest value in the array

1 points   

QUESTION 8

1. Given the following two arrays, which of the following will copy the values from sourceArray into targetArray?

   int[] sourceArray = {2, 3, 1, 5, 10};

   int[] targetArray = new int[sourceArray.length];

   		sourceArray = targetArray;
   		targetArray = sourceArray;
   		targetArray[] = sourceArray[];
   		sourceArray.copyInto(targetArray, 0, sourceArray.length);;
   		None of the above

QUESTION 1

1. An array is an object

   True

   False

1 points   

QUESTION 2

1. To add a new element on to the end of an array myArray,

   		assign a new value to element myArray[myArray.length]
   		use the myArray.add method
   		use the myArray.resize method followed by the myArray.add
   		new elements can't be added on to the end of an array

1 points   

QUESTION 3

1. Assume myArray is a valid and instantiated array of int values. Also assume the user is asked for an int value arIndx, and enters -1.

   myArray[arIndx] = 3;

   will

   		set the [-1] element of myArray to 3, even though this memory isn't in myArray's memory
   		cause a compiler error
   		cause a runtime exception
   		renumber myArray's elements to be from -1 to myArray.length-2

1 points   

QUESTION 4

1. Note: Multiple Answer

   Which of the following will add 1 to each element of an appropriately declared, created and initialized int[] iVals?

   		int i = iVals.length - 1; while (i >= 0) { iVals[i]++; i--; }
   		for (int i: iVals) { i = i + 1; }
   		for (int i: iVals) { iVals[i]++; }
   		for (int i = 0; i < iVals.length; i++) { iVals[i] += 1

QUESTION 9

1. In order to perform a binary search on an array, which of the following must be true (select all that apply)?

   		The array must be ordered
   		The array must contain integers
   		The array must have an even number of elements
   		The array must have an odd number of elements

1 points   

QUESTION 10

1. Command line arguments are made available to main() via an array of _______.

1 points   

QUESTION 11

1. The first action performed in a binary search is

   		Determine the largest value in the array
   		Determine the smallest value in the array
   		Determine the mid-point of the array
   		Determine if the array is sorted

1 points   

QUESTION 12

1. If an array contains unordered values, searching for a particular value

   		is accomplished with a linear search
   		is accomplished with the bipolar search
   		can't be done in Java
   		requires multiple parallel processing threads

1 points   

QUESTION 13

1. What best describes the processing of the following method?

   public static int[] mystery(int[] list) {

   int[] result = new int[list.length];

   for (int i = 0, j = result.length - 1;

          i < list.length; i++, j--) {

       result[j] = list[i];

   }

   return result;

   }

   		Returns an array with the values from list sorted in ascending order
   		Returns an array with the values from list sorted in descending order
   		Returns an array with the values from list decremented by 1
   		Returns an array with the values from list reversed

1 points   

QUESTION 14

1. The first action performed in Selection Sort is

   		convert all values to integers
   		find the largest value in the array
   		locate the midpoint of the array
   		find the smallest value in the array

1 points   

QUESTION 15

1. When Selection Sort is run against an array the end result is

   		the values in the array are reordered smallest to largest
   		the array is unchanged because the sorted values are placed in a different array
   		none of the other answers are correct
   		the values in the array are reordered largest to smallest

Answer 1

1. Answer: True, they are object that can be dynamically created and assigned variable values

2. Answer: new elements can't be added on to the end of an array, as the size of the array is fixed. We can make arrays dynamic using arraylist

3. Answer: cause a runtime exception as ArrayIndexOutOfBoundException

4. Answer: a and d

int i = iVals.length - 1;

while (i >= 0)

{

 iVals[i]++;
 i--;

}

And

for (int i = 0; i < iVals.length; i++)

{

 iVals[i] += 1

}

5 Answer: 3, as the value of first array is assigned to second array

6. Answer: 3, 7 and 4 are the values obtained as output

7. Answer: Sets max to the largest value in the array

8. Answer: targetArray = sourceArray;

9. Answer: to perform binary search The array must be ordered and The array must contains integers

10.Answer: Array of strings represented mostly as args

11.Answer: Determine the mid-point of the array

12. Answer: is accomplished with a linear search

13. Answer: Returns an array with the values from list sorted in descending order

14 Answer: find the smallest value in the array

15. Answer: the values in the array are reordered smallest to largest