Java Basics 2

In the following method declaration, what is the name of the method?

public static void showMenu(String category) {}

• public

• static

• void

• showMenu

• String

In the following method declaration header, how many formal parameters are there?

public static double squareRoot(double value)

• 0

• 1

• 2

• None. Methods do not have formal parameters

What word is missing below (fill in the __________). The method called increaseTemperature takes 2 integers as formal parameters. The two parameters represent the upper and lower targets. The method returns the difference between the upper and lower targets as an integer.

public static _________ increaseTemperature(int upper, int lower) { return upper - lower;}

• void

• double

• int

• return

• Nothing. No word is needed in the blank space.

What is the output of this main() method?

public static void main(String [] args) {

System.out.print("A");

processRequest();

System.out.print("B"); System.out.print("C");

showMenu();

System.out.print("D");}

public static void showMenu() { System.out.print("Q");}

public static void eraseFile() { System.out.print("T");}

public static void processRequest() { System.out.print("2");}

• ABCDQT2

• A2BDCTQ

• A2BCQD

• A2CBQD

• A2BCQTD

The following code in the main is valid:

public static void main(String [] args) {

int value; value = createGameCharacter();

// rest of program}

public static void createGameCharacter() { // code}

• true

• false

• Impossible to determine

The following code in the main is valid:

public static void main(String [] args) {

int value; value = depositMoney(amount); // rest of program}

public static int depositMoney() { return 4;}

• true

• false

• Impossible to determine

What is the output of this main() method?

public static void main(String [] args) {

int value; loadSong(5);

value =checkLength(1);

System.out.print(value);

public static void loadSong(int id) { System.out.print(id);}

public static int checkLength(int id) { System.out.print(id); id = id + 4; System.out.print(id); return 9;}

• 5199

• 5559

• 5159

• 519

• 5

When the changeChannel() method is called below, what is the value of the parameter (i.e. number)?

public static void main(String [] args) {

int ch; ch = 240;

changeChannel(ch + 10);}

public static void changeChannel(int number) { // code is hidden}

• No value

• 250

• 240

• 10

What is the value that is returned in the following method?

public static int getVolume() {

int v; v = 23;

if (v < 50) { return 50; }

return v;

}

• 23

• 100

• 50

• No value is returned

• 50 and 23

The call to the method installApp() is valid:

public static void main(String [] args) {

installApp("Angry Birds", "version 1.2");}

public static void installApp(String appName, int appVersion) { // hidden code}

• true

• false

• Impossible to determine