Parameters Review

These questionss are designed to asssess your current understanding of parameters!

Questions 1

What is the output?

public static void main(String[] args) {
   repeat(2, "banana bread is delicious");
   repeat(3, "I love rubber band balls");
}

public static void repeat(int times, String phrase) {
   for (int i = 1; i <= times; i++) {
      System.out.println(phrase);
   }
}

1.  banana bread is delicious
    banana bread is delicious
    I love rubber band balls
    I love rubber band balls
    I love rubber band balls
   

2.  banana bread is delicious banana bread is delicious
    I love rubber band balls I love rubber band balls I love rubber band balls
   

3.  banana bread is delicious
    I love rubber band balls
   

4.  2
    3
   

See Answer

Option 1 is correct!

In the method repeat the parameter times is utilized in the for loop to loop and print the parameter phrase, times number of times.

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Question 2

True or False: There is an error in the following code.

public static void main(String[] args) {
    String star = "*";
    int value = -5;
    print(value, star);
}

public static void print(String shape, int n) {
    System.out.println("I have " + n + "number of " shape);
}

See Answer

True!

There is an error on line print(value, star); because the order of parameters do not match for what the method print is expecting, which is a String then an integer.

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Question 3

What is the output?

public static void main(String[] args) {
    int val = 1;
    mOne(val);
    val = -1; 
    mTwo(val);
    mThree(val);
}

public static void mOne(int val) {
    System.out.println("One " + val);
}

public static void mTwo(int val) {
    val = val * 2;
    System.out.println("Two " + val);
}

public static void mThree(int val) {
    mOne(val);
    val = val + 3;
    System.out.println("Three " + val);
}

1.  One 1
    Two -2
    One 1
    Three 4
   

2.  One 1
    Two 2
    One 1
    Three 4
   

3.  One 1
    Two -2
    One -1
    Three 2
   

4.  One 1
    Two -2
    One 2
    Three 5
   

See Answer

Option 3 is correct!

First we call mOne() and pass a val of value 1.

Second we call mTwo() and pass the updated val of value -1. Then print the updated val inside mTwo().

Third we call mThree() and again pass the val of value -1, inside which we call mOne() and pass val of value -1 as well. Then print the updated val inside mThree().

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Question 4

Find the error(s): multiple options may be correct.

1    public static void main(Strings[] args) {
2        String name = "Min"
3        int val = 25; 
4        findErr(name);
5        findErr(name, val);
6        findErr(val, name);
7        findErrTwo();
8    }
9    
10    public static void findErr(String name, int val) {
11        System.out.println("hello " + val + " age is " + name " ?");
12    }
13    
14    public static void findErrTwo() {
15        System.out.println("Yikes");
16        findErr();
17    }

1. line 2

2. line 5, line 6

3. line 4, line 6

4. line 7

5. line 16

See Answer

Options 1, 3, and 5 are correct!

line 2: missing semicolon

line 4: missing a parameter

line 6: the parameter types do not match what findErr() is expecting

line 16: missing a parameter

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Question 5

What is the output?

public static void main(String[] args) {
    String playerOne = "Ninda"; 
    String playerTwo = "Rita";  
    
    gameOne(playerTwo, playerOne);
    gameTwo(playerOne, 5);
}

public static void gameOne(String playerOne, String playerTwo) {
    System.out.println(playerOne + " has won!");
    System.out.println(playerTwo + "has lost!");
}

public static void gameTwo(String player, int lives) {
    System.out.println(player + " has " + lives * 2 + " lives.");
}

1.  Ninda has won!
    Rita has lost!
    Ninda has 5 lives.
   

2.  Rita has won!
    Ninda has lost!
    Ninda has 5 lives.
   

3.  Ninda has won!
    Rita has lost!
    Ninda has 10 lives.
   

4.  Rita has won!
    Ninda has lost!
    Ninda has 10 lives.
   

See Answer

Option 4 is correct!

Option 4 is the answer because, gameOne’s first parameter passed is “Rita” and the second is “Ninda”, thus the order of parameters passed is more important that the variable name. For the last line, the parameter lives is multiplied by 2.