A procedure that is defined by the user is called

A procedure that is defined by the user is called 

What are parameters?

 

·         The formal names given to the data that gets passed into a method.

 

A procedure that is defined by the user is called:

 

·         Method

 

What is a Javadoc?

 

·         a comment that clearly states the functionality and usage of a class or method.

 

The value that a method outputs is called

 

·         a return value

 

What does a void method return?

 

·         no value

 

What does this method call output?

public double doubleNumber(double myNumber)
{
return (double) (int) myNumber * 2;
}

doubleNumber(7.8);

 

·         14.0

 

What does this method call return?

public int tripleInt(int x)
{
return x * 3;
}

tripleInt(4);

 

·         12

 

What will the value of myBankAccount be after the method call?

int myBankAccount = 122;

public void depositMoney(int bankAccount, int deposit)
{
bankAccount += deposit;
}

depositMoney(myBankAccount, 572);

 

·         122

 

write a method that will ask for user input until user inputs the String "no". Allow the user to input any capitalization of the String "no" ("no", "No", "NO", "nO") Also, have the method return the number of loops.

 

·         public int loopTillNo()
{
int count = 0;
while(!readLine("Again?").toLowerCase().equals("no"))
{
count++;
}
return count;
}

 

What will this method call print?

public void patternGrid(int rows, int columns, char symbol)
{
for(int m = 0; m < rows; m++)
{
for(int n = 0; n < columns; n++)
{
System.out.print(symbol);
}
System.out.println();
}
}

patternGrid(3,4,'#');

 

·         ####
####
####

 

 

What would this method call output?

public int divideByTen(int num)
{
while(num / 10 >= 10)
{
num /= 10;
}
return num;
}

divideByTen(340)

 

·         34

 

What is the return value of this method call?

public static String findTheMiddle(int number)
{
String stringNum = "" + number;
int mid = stringNum.length()/2;

if(stringNum.length() % 2 == 1)
{
return stringNum.substring(mid,mid+1);
}
else
{
return stringNum.substring(mid-1,mid+1);
}
}

findTheMiddle(2110890125)

 

·         89

 

What is returned by this method call: translator("pokemon")?

public String translator(String word)
{
return word.substring(1) + word.charAt(0) + "ay";
}

 

·         "okemonpay"

 

What will this method call output?

public int checkMethod(boolean x, boolean y)
{
if(!x)
{
if(y)
{
return -1;
}
else
{
return 1;
}
}
else
{
return 0;
}
}

checkMethod(false, true)

 

·         -1

 

What could the method signature for a Karel command look like?

 

·         public void move()
{
//some code
}

 

What will this method call print to the screen?

public static void formatText(int a, int b, String c)
{
System.out.println(b + " " + c + ", " + a);
}

formatText(2018, 17, "Dec")

 

·         17 Dec, 2018

 

Write a method that loops forever until the user inputs the correct secret password or until the user fails to enter the correct password 10 times. The secret password the program should look for is the String "secret"

 

 

·         public void secretPassword()
{
int count = 0;
while(true)
{
if(count == 10)
{
System.out.println("You are locked out!");
return;
}

if(readLine("Password?").equals("secret"))
{
System.out.println("Welcome!");
return;
}

count++;
}
}

 

What will this method call output?

public String yesOrNo(boolean myBoolean)
{
if(myBoolean == true)
{
return "Yes";
}
else
{
return "No";
}
}

yesOrNo(true)

 

·         "Yes"

 

What will this method call output?

public boolean someMethod(int number)
{
if(number % 2 == 1)
{
return true;
}
else
{
return false;
}
}

someMethod(9990)

 

·         false

 

What will this method call output?

public int myMethod(String x, char y)
{
int z = 1;
for(int i = 0; i < x.length(); i++)
{
if(x.charAt(i) == y)
{
z++;
}
}
return z;
}

myMethod("Karel The Dog", 'e');

 

·         3

 

What is wrong with this method definition?

public int printPayAmount(int amount)
{
System.out.println(amount);
}

 

·         Nothing is returned from this method

 

What kind of error does this method cause?

public void myMethod(String x)
{
for(int i = 0; i <= x.length(); i++)
{
System.out.println(x.substring(i, i+1));
}
}

myMethod("Frog");

 

·         Runtime Error: String index out of range

 

What will this method call print to the screen?

public void funWithNumbers(double myDouble)
{
int myInt = (int) myDouble;
String myString = "";
while(myInt != 0)
{
myString = myInt % 10 + myString;
myInt /= 10;
}
System.out.println(myString);
}

funWithNumbers(314159)

 

·         314159

 

Why do we use methods in Java? (which ones)

I. To make code easier to understand
II. To define global variables
III. To avoid repeated code
IV. To simplify code
V. To avoid needing to define them as public or private

·         xxx6

 

What does this method call output?

public int someMethod(int x, int y)
{
int sum = 0;
while (x < 10)
{
sum += x % y;
x++;
y++;
}
return sum;
}

someMethod(3,1)

 

·         10