New RBI Grade B 2025 Notification will come Soon! Enroll Here

    Question

    In OOP, what term best describes the relationship where

    one object is a part of another but cannot exist independently?
    A Composition Correct Answer Incorrect Answer
    B Aggregation Correct Answer Incorrect Answer
    C Inheritance Correct Answer Incorrect Answer
    D Polymorphism Correct Answer Incorrect Answer
    E Association Correct Answer Incorrect Answer

    Solution

    Composition is a "has-a" relationship where one object contains another, and the contained object cannot exist independently of the parent. 1. Dependency: For instance, an engine is part of a car and cannot function independently outside of it. 2. Tight Coupling: The lifecycle of the child object depends entirely on the parent object. If the parent is destroyed, the child is destroyed too. 3. Reusability: Composition fosters code reuse by enabling modular design without strict inheritance hierarchies. Option A exemplifies composition through its strong containment relationship, central to creating complex, interdependent systems. Why Other Options Are Incorrect: • B) Aggregation: Denotes a weaker "has-a" relationship, where components can exist independently. • C) Inheritance: Refers to property sharing, not containment. • D) Polymorphism: Focuses on method behavior variability. • E) Association: A general relationship without specific containment rules.

    Practice Next