PCAP-31-03 4.1 Understand the Object-Oriented Approach PCAP-31 Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   What is encapsulation in object-oriented programming?

   • AThe bundling of data and methods that operate on that data, restricting direct access to some components
   • BThe process of hiding the implementation details of a method
   • CThe ability to inherit attributes from a parent class
   • DThe ability to create multiple objects from a single class
   Reveal Solution Discussion Select an answer first
2. 12foundation · easy

   In Python, how can you make an attribute 'protected' from direct access?

   • ADeclare the attribute as 'static'
   • BPrefix the attribute name with a double underscore (e.g., __attr)
   • CPrefix the attribute name with a single underscore (e.g., _attr)
   • DUse the 'private' keyword before the attribute
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4. 13foundation · easy

   What is inheritance in object-oriented programming?

   • AThe process of creating a new class that reuses and extends the behavior of an existing class
   • BThe process of defining multiple methods with the same name
   • CThe ability to hide data from outside access
   • DThe ability of a class to have multiple instances
   Reveal Solution Discussion Select an answer first
5. 14application · medium

   A logistics company needs to track each delivery truck's current fuel level and a method to refuel. The developer defines a class Truck with an __init__ method that sets self.fuel. Which code snippet correctly creates a new truck with 50 liters of fuel and then refuels it by 20 liters?

   • At = Truck(50) Truck.fuel += 20
   • Bt = Truck(50) t.fuel += 20
   • Ct = Truck() t.fuel = 50 t.fuel += 20
   • Dt = Truck(50) t.refuel(20)
   Reveal Solution Discussion Select an answer first
6. 15application · easy

   Given the following class: class BankAccount: def __init__(self, owner, balance=0): self.owner = owner self.__balance = balance def deposit(self, amount): self.__balance += amount def get_balance(self): return self.__balance Which statement correctly identifies the properties and methods of a BankAccount object?

   • AProperties: owner, balance; Methods: deposit, get_balance
   • BProperties: owner, __balance; Methods: deposit, get_balance, __balance
   • CProperties: owner, __balance; Methods: deposit, get_balance, __init__
   • DProperties: owner, __balance; Methods: deposit, get_balance
   Reveal Solution Discussion Select an answer first