Object oriented programming interview questions

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Question 1: Why Object Oriented Programming?

Answer: Object-oriented programming helps us think in terms of real-world objects.

Example: Doctor attending the patient, so a particular patient has a doctor
      
        class Patient {
            public string name { get; set; }
            public string address { get; set; }
            public Doctor doctorDetails { get; set; }
        }

        class Doctor {
            public string name { get; set; }
        }
Question 2: What are the important pillars in OOP?

Answer:

  1. Abstraction: Show only what is necessary
  2. Polymorphism: Objects act differently under different conditions
  3. Inheritance: Parent-Child relations
  4. Encapsulation: Hide complexity

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