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Consider the code snippet shown below: Stack words1 = new Stack(); Stack words2 = new Stack(); words1.push(“abc”); words1.push(“def”); words1.push(“ghi”); while (!words1.empty()) { words2.push(words1.pop()); } while (!words2.empty()) { System.out.print(words2.pop()); } What will be printed when this code is executed?

Which of the following statements about superclasses and subclasses is true?

Consider the following code snippet: Vehicle aVehicle = new Auto(4,”gasoline”); String s = aVehicle.toString(); Assume that the Auto class inherits from the Vehicle class, and neither class has an implementation of the toString() method. Which of the following statements is correct?

Consider the following code snippet: Vehicle aVehicle = new Auto(); aVehicle.moveForward(200); Assume that the Auto class inherits from the Vehicle class, and both classes have an implementation of the moveForward method with the same set of parameters and the same return type. What determines which class’s moveForward method is to be executed?

Consider the following code snippet: public static void sort(int[] a) { for (int i = 1; i < a.length; i++) { int next = a[i]; int j = i; while (j > 0 && a[j – 1] > next) { a[j] = a[j – 1]; j–; } a[j] = next; } } What sort algorithm is used in this code?

Consider the following code snippet: Vehicle aVehicle = new Auto(); aVehicle.moveForward(200); Assume that the Auto class inherits from the Vehicle class, and both classes have an implementation of the moveForward method with the same set of parameters and the same return type. What determines which class’s moveForward method is to be executed?

Consider the following code snippet: Map scores; If you need to visit the keys in sorted order, which of the following statements will create a structure to support this?

To test whether an object belongs to a particular type, use

Consider the following code snippet: Map scores; If you need to visit the keys in sorted order, which of the following statements will create a structure to support this?

Consider the following code snippet, assuming that filename represents the name of the output file and writeData outputs the data to that file: try (PrintWriter outputFile = new PrintWriter(filename)) { writeData(outputFile); } Which of the following statements about this code is correct?