Exam 7: Arrays and Array Lists

When a Java program terminates and reports an exception, the error message contains which pieces of useful information? I. The compile and revision control history of the source code changes that caused the error II. The name of the exception that occurred III. The stack trace

What is the output of the code snippet below? Int[][] arr = { { 1, 2, 3, 0 }, { 4, 5, 6, 0 }, { 0, 0, 0, 0 } }; Int val = arr[1][2] + arr[1][3]; System.out.println(val);

What is the result of executing this code snippet? Int[] marks = { 90, 45, 67 }; For (int i = 0; i <= 3; i++) { System.out.println(marks[i]); }

Which one of the following is the correct header for a method named arrMeth that is called like this: arrMeth(intArray); // intArray is an integer array of size 3

What will be printed by the statements below? Int[] values = { 4, 5, 6, 7}; Values[0] = values[3]; Values[3] = values[0]; For (int i = 0; i < values.length; i++) System.out.print (values[i] + " ");

Complete the following code snippet with the correct enhanced for loop so it iterates over the array without using an index variable. String[] arr = { "abc", "def", "ghi", "jkl" }; ___________________ { System.out.print(str); }

What is the output of the following code? Int[][] counts = { { 0, 0, 1 }, { 0, 1, 1, 2 }, { 0, 0, 1, 4, 5 }, { 0, 2 } }; System.out.println(counts[3].length);

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

What will be printed by the statements below? ArrayList<String> names = new ArrayList<String>(); Names.add("Annie"); Names.add("Bob"); Names.add("Charles"); Names.set(2, "Doug"); Names.add(0, "Evelyn"); System.out.print (names);

What should you check for when calculating the largest value in an array list?

Which one of the following is a correct declaration for a method named passAList with the array list num of size 5 as a parameter?

When an array reading and storing input runs out of space

When the order of the elements is unimportant, what is the most efficient way to remove an element from an array?

What will be printed by the statements below? ArrayList<String> names = new ArrayList<String>(); Names.add("Annie"); Names.add("Bob"); Names.add("Charles"); For (int i = 0; i < 3; i++) { String extra = names.get(i); Names.add (extra); } System.out.print (names);

Which code snippet finds the largest value in an array that is only partially full?

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(1, "Tony"); For (String s : names) { System.out.print(s + ", "); }

Consider the following code snippet: String[] data = { "123", "ghi", "jkl", "def", "%&*" }; Which statement sorts the data array in ascending order?

What is displayed after executing the given code snippet? Int[] mymarks = new int[10]; Int total = 0; Scanner in = new Scanner(System.in); For (int cnt = 1; cnt <= 10; cnt++) { System.out.print("Enter the marks: "); Mymarks[cnt] = in.nextInt(); Total = total + mymarks[cnt]; } System.out.println(total);

How many elements can be stored in a two-dimensional 5 by 6 array?

It may be necessary to "grow" an array when reading inputs because