Blog

Consider the following method. public static String abMethod(String a, String b) { int x = a.indexOf(b);   while (x >= 0) { a = a.substring(0, x) + a.substring(x + b.length()); x = a.indexOf(b); }   return a; } What, if anything, is returned by the method call abMethod(“sing the song”, “ng”) ?

Consider the following method. /** Precondition: Strings one and two have the same length. */ public static String combine(String one, String two) { String res = “”; for (int k = 0; k < one.length(); k++) { if (one.substring(k, k + 1).equals(two.substring(k, k + 1))) { res += one.substring(k, k + 1); } else { res += "0"; } } return res; } What is returned as a result of the call combine("10110", "01100") ?

Consider the following code segment. int num = 1; for (int k = 2; k < 10; k++) { num = 0; num = num + k; } What will be the value of num after the loop is executed?

Consider the following code segment. int count = 5; while (count < 100) { count = count * 2; } count = count + 1; What will be the value of count as a result of executing the code segment?

Consider the following methods, which appear in the same class. public int function1(int i, int j) { return i + j; }   public int function2(int i, int j) { return j – i; } Which of the following statements, if located in a method in the same class, will initialize the variable x to 11?

Consider the following code segment. int outerMax = 10; int innerMax = 5;   for (int outer = 0; outer < outerMax; outer++) { for (int inner = 0; inner

Consider the following code segment. int value = 15; while (value < 28) {   System.out.println(value);   value++; }   What are the first and last numbers output by the code segment?

Consider the following code segment. int num = 5; num *= 2; num %= 6; What is the value of num after the code segment is executed?

Consider the following code segment. /* missing loop header */ { for (int k = 0; k < 4; k++) { System.out.print(k); } System.out.println(); } The code segment is intended to produce the following output. 0123 0123 0123 Which of the following can be used to replace /* missing loop header */ so that the code segment works as intended? for (int j = 0; j < 3; j++) for (int j = 1; j < 3; j++) for (int j = 1; j

Consider the following code segment. String str = “a black cat sat on a table”; int counter = 0;   for (int i = 0; i < str.length() - 1; i++) { if (str.substring(i, i + 1).equals("a") &&     !str.substring(i + 1, i + 2).equals("b")) { counter++; } }   System.out.println(counter); What is printed as a result of executing this code segment?