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Object Oriented Programming MCQs with Answers

Practice important Object Oriented Programming MCQs with answers and explanations.

Multiple Choice Questions

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Q61: The principle of abstraction focuses on capturing only those details about an object that are _______ to the current perspective.
  • A: relevant
  • B: irrelevant
  • C: complex
  • D: detailed
View Answer
A

Q62: The concept of generalization in object-oriented models reduces _______ and increases _______.
  • A: complexity; reusability
  • B: redundancy; maintainability
  • C: abstraction; inheritance
  • D: behavior; flexibility
View Answer
B

Q63: A class that extends the behavior of another class by adding new attributes is an example of _______.
  • A: specialization
  • B: extension
  • C: sub-typing
  • D: restriction
View Answer
B

Q64: In OO models, "Person" is an example of a(n) _______ class, while "Student" and "Teacher" are examples of _______ classes.
  • A: abstract; concrete
  • B: concrete; abstract
  • C: abstract; derived
  • D: derived; concrete
View Answer
A

Q65: Sub-typing allows a derived class to _______ the base class but also include additional characteristics.
  • A: override
  • B: ignore
  • C: replace
  • D: extend
View Answer
D

Q66: Which of the following statements about concrete classes is true?
  • A: They implement a concept and provide specific details for objects
  • B: They are used to generalize behavior and cannot be instantiated
  • C: They exist only at the top of the class hierarchy
  • D: They are often used to represent abstract concepts
View Answer
A

Q67: Specialization is used to _______ the general behavior of a class to fit specific needs.
  • A: extend
  • B: restrict
  • C: ignore
  • D: add
View Answer
D

Q68: Which of the following is NOT a benefit of inheritance?
  • A: Reuse
  • B: Redundancy
  • C: Reduced code complexity
  • D: Improved maintainability
View Answer
B

Q69: Abstract classes are typically placed _______ in a class hierarchy.
  • A: at the top
  • B: below concrete classes
  • C: intermediate
  • D: level-specific
View Answer
A

Q70: In the example of shapes, the Circle, Line, and Triangle are all _______ classes derived from the _______ class.
  • A: concrete; Shape
  • B: abstract; Shape
  • C: concrete; Geometric
  • D: abstract; Geometric
View Answer
A

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