Exam 7: Arrays and Array Lists

Which statement is true about the code snippet below? ArrayList<String> names = new ArrayList<String>(); Names.add("John"); Names.add("Jerry"); ArrayList<String> friends = new ArrayList<String>(names); Friends.add("Harry");

) Suppose you wish to process an array of values and eliminate any potential duplicate values stored in the array. Which array algorithms might be adapted for this?

Which one of the following is the correct code snippet for calculating the largest value in an integer array list aList?

What is the output of the following statements? ArrayList<String> names = new ArrayList<String>(); Names.add("Bob"); Names.add(0, "Ann"); Names.remove(1); Names.add("Cal"); Names.set(2, "Tony"); For (String s : names) { System.out.print(s + ", "); }

Consider the following code snippet: Int[][] arr = { { 1, 2, 3, 0 }, { 4, 5, 6, 0 }, { 0, 0, 0, 0 } }; Int[][] arr2 = arr; System.out.println(arr2[2][1] + arr2[1][2]); What is the output of the given code snippet on execution?

Consider the following code snippet: Int[][] numarray = { { 3, 2, 3 }, { 0, 0, 0 } }; System.out.print(numarray[0][0]); System.out.print(numarray[1][0]); What is the output of the given code snippet?

Assume the following variable has been declared and given a value as shown: Int[] numbers = {9, 17, -4, 21 }; Which is the value of numbers.length?

Which one of the following statements is correct for displaying the value in the third row and the fourth column of a two-dimensional 5 by 6 array?

Java 7 introduced enhanced syntax for declaring array lists, which is termed

Consider the following code snippet: ArrayList<Integer> arrList = new ArrayList<Integer>(); For (int i = 0; i < arrList.size(); i++) { ArrList.add(i + 3); } What value is stored in the element of the array list at index 0?

Which statement is true about the code snippet below? ArrayList<String> names = new ArrayList<String>(); Names.add("John"); Names.add("Jerry"); ArrayList<String> friends = names; Friends.add("Harry");

Which one of the following code snippets accepts the integer input in an array list named num1 and stores the odd integers of num1 in another array list named oddnum?

Which code snippet prints out the elements in a partially filled array of integers?

What will be printed by the statements below? Int[] values = { 1, 2, 3, 4}; Values[2] = 24; Values[values[0]] = 86; For (int i = 0; i < values.length; i++) System.out.print (values[i] + " ");

Assume the method doSomething has been defined as follows: Int [] doSomething (int[] values) { Int [] result = new int[values.length - 1]; For (int i = 0; i < result.length; i++) { Result[i] = values[i] + values[i + 1]; } Return result; } What is printed by the statements below? Int [] nums = {3, 18, 29, -2} ; System.out.print (Arrays.toString(doSomething(nums)));

Consider the following code snippet: public static void main(String[] args) { ArrayList<String> names = new ArrayList<String>(); Names.add("John"); Names.add("Jerry"); Names.add("Janet"); ArrayList<String> names2 = reverse(names); } Public static ArrayList<String> reverse(ArrayList<String> names) { ArrayList<String> result = new ArrayList<String>(); For (int i = names.size() - 1; i >= 0; i--) { Result.add(names.get(i)); } Return <String>result; } Which statement is true after the main method is executed?

Consider the following line of code for calling a method named func1: func1(listData, varData); Which one of the following method headers is valid for func1, where listData is an integer array list and varData is an integer variable?

Assume the following variable has been declared and given a value as shown: Int[][] data = { {9, 17, -4, 21 }, {15, 24, 0, 9}, {6, 2, -56, 8}, }; Which is the value of data[1][2]?

Select the statement that reveals the logic error in the following method. public static double minimum(double[] data) { Double smallest = 0.0; For (int i = 0; i < data.length; i++) { If (data[i] < smallest) { Smallest = data[i]; } } Return smallest; }

Which statement is true about the code snippet below? public static void main(String[] args) { Scanner in = new Scanner(System.in); ArrayList<Double> inputs = new ArrayList<Double>(); Int ind = 0; While (in.hasNextDouble()) { Inputs.set(ind, in.nextDouble()); Ind++; } }