Outcome3 Evidence1 PC3.1-PC3.3 A12[ASP]/51

PC3.1 Consider the following class, which uses the instance variable dollars to represent the money in a wallet in dollars.

The putMoneyInWallet method is intended to increase the dollars in the wallet by the parameter amount and then return the updated dollars in the wallet. Which of the following code segments should replace missing code so that the putMoneyInWallet method will work as intended?

• amount += dollars;

  return dollars;

• dollars = amount;

  return amount;

• dollars += amount;

  return dollars;

• dollars = dollars + amount;

  return amount;

• amount = dollars + amount;

  return dollars;

PC3.1 Consider the Liquid class below.

The isBoiling() method is intended to return true if increasing the currentTemp by the parameter amount is greater than or equal to the boilingPoint, or otherwise return false.

Which of the following code segments can replace missing code to ensure that the isBoiling method works as intended?

• if (currentTemp + amount > boilingPoint)

  {

  return true;

  }

  else

  {

  return false;

  }

• if (amount > currentTemp)

  {

  return false;

  }

  else

  {

  return currentTemp;

  }

• if (amount + currentTemp >= boilingPoint)

  {

  return true;

  }

  else

  {

  return false;

  }

• if (currentTemp + amount < boilingPoint)

  {

  return true;

  }

  else

  {

  return false;

  }

PC3.1 Consider the following class definition. The calculatePizzaCostPerPerson method is intended to calculate the amount each person at the party must pay for pizza. The amount is equal to the total price of all the pizza boxes divided by the number of people at the party. Which of the following code segments should replace missing code so that the calculatePizzaCostPerPerson method will work as intended?

• return numOfPeople * numOfBoxes * priceOfOnePizzaBox;

• return (numOfBoxes * priceOfOnePizzaBox) / numOfPeople;

• return (numOfBoxes + priceOfOnePizzaBox) / numOfPeople;

• return numOfBoxes / priceOfOnePizzaBox / numOfPeople;

• return numOfPeople / (numOfBoxes * priceOfOnePizzaBox);

PC3.2 Which of the following is considered a formal parameter; that is the identifier used in a method to stand for the value that is passed into the method by a caller?

• balance

• amount

• bobsAccount

• 200

PC3.2 Which of the following is considered a actual parameter, that is the actual value that is passed into the method by a caller?

• balance

• amount

• bobsAccount

• 200

PC3.2 Actual parameters in methods are often called __________________.

• instance variables

• arguments

• local variables

• global variables

PC3.3 Consider the following code segment:

public class Student

{

private static int lastAssignedStudentNum = 1500;

{ . . . }

}

Which of the following statements about this code is correct?

• Each object created from this class will have its own lastAssignedStudentNum variable.

• All objects created from this class will share the lastAssignedStudentNum variable.

• The lastAssignedStudentNum variable's value cannot be changed.

• You cannot assign a value to a static variable.

PC3.3 Which statement illustrates the invocation of a static method?

• mySavings.deposit(100);

• double s = Math.sqrt(100);

• deposit(100).mySavings;

• double s = 100.sqrt();

PC3.3 You have created an Employee class. You wish to have a unique, sequential employee number assigned to each new Employee object that is created. Which of the following declarations, if added to the Employee class, would allow you to determine which number was last assigned when you are creating a new Employee object?

• private static int lastAssignedEmpNum = 500;

• public int lastAssignedEmpNum = 500;

• private int lastAssignedEmpNum = 500;

• public static int lastAssignedEmpNum = 500;

PC3.3 Consider the following code segment:

public static class Triangle

{

public static double getTriangleArea(double heightLen, double baseLen)

{ . . . }

}

You are writing a program that needs to use this method. Write the correct statement that calls this method and passes the arguments 4.0 and 7.0 consecutively?