Topic 7.1: Object-oriented programming Questions

A haulage firm has 10 drivers held in a list called drivers, each a Driver object with the methods year_total() and best_month() and a getter get_id(). Two class-level values, bonusA and bonusB, are paid as follows: bonusA if the year's total distance is over 300000, and bonusB if any single month is over 20000. Construct a Python function pay_bonuses() that, for each driver, works out the total bonus and outputs their id and that bonus.

A haulage firm has a Driver class. Its constructor takes a staff id, stores it in a private attribute, and declares an empty collection that will later hold twelve monthly distance totals. List the operations that would be carried out by the constructor when a new Driver object is created.

A Sailing class holds seatsSold, capacity, basePrice and a bookings array of Booking objects. Construct a Python method add_booking() that takes a name and an email, works out the current fare by calling the existing method updated_fare(), creates the Booking, stores it and keeps the count in step.

A haulage firm has 10 drivers held in an array called drivers, each a Driver object with the methods yearTotal() and bestMonth() and a getter getId(). Two static values, bonusA and bonusB, are paid as follows: bonusA if the year's total distance is over 300000, and bonusB if any single month is over 20000. Construct a Java method payBonuses() that, for each driver, works out the total bonus and outputs their id and that bonus.

A Sailing class holds seatsSold, capacity, basePrice and a bookings array of Booking objects. Construct a Java method addBooking() that takes a name and an email, works out the current fare by calling the existing method updatedFare(), creates the Booking, stores it and keeps the count in step.

State four members a class may contain.

Describe what happens to an object's attributes when a second object of the same class is created.

Describe the difference between an instance method and a static method.

Outline the lifetime of an object.

A delivery program declares: class Truck(Vehicle): Identify the OOP feature that this class header shows.

A drawing program has a Shape class with Circle and Square subclasses. Describe one benefit of inheritance in this program.

A shop's stock program already uses encapsulation. Identify two other features of object-oriented programming.

A hotel's Room class has a boolean attribute seaView. The hotel adds a third option, rooms with a garden view. Outline one change needed to the variable seaView.

Choose what a constructor does.

Choose what happens when one object reference is assigned to another variable.

Choose the principle that lets different classes respond to the same call in their own way.

Define object-oriented programming.

Determine the methods a Seat class in a cinema system should offer.

Explain why a well-designed interface makes a class easier to change.

Determine whether a Car and an Engine should be related by inheritance or association, and justify your answer.