Practice Object Oriented Programming Questions and Answers

• What is an interface in OOP (e.g., Java, C#)?
• Which statement about abstract methods is true?
• How does abstraction contribute to code maintainability?
• Which of the following best represents a real-world example of abstraction?
• What is the primary difference between an abstract class and an interface in Java (pre-Java 8)?
• If a class contains an abstract method, what must be true about the class itself?
• Which OOP principle is most closely related to the concept of "information hiding"?
• What is Encapsulation in OOP?
• Which access modifier is most commonly used to achieve data hiding in encapsulation?
• What are "getter" and "setter" methods primarily used for in the context of encapsulation?
• Which of the following is a benefit of encapsulation?
• Consider a BankAccount class with a balance field. To properly encapsulate balance, it should be declared as:
• Which of the following is the correct way to handle exceptions in Java?
• In Java, what is the difference between '==' and '.equals()' when comparing String objects?
• What does the following Java code snippet demonstrate? class Animal {     void sound() { System.out.println("Some sound"); } } class Dog extends Animal {...
• What is the purpose of the 'static' keyword in Java?
• In .NET (C#), what is the difference between 'struct' and 'class'?
• What is 'recursion' in programming?
• Which of the following is not a valid type of inheritance in Java?
• Which of the following statements is incorrect in reference to Java?