Object-Oriented Programming (OOP)
What is Composition primarily used for?
Difficulty: Hard
About this MCQ
This Hard Object-Oriented Programming (OOP) question asks: What is Composition primarily used for? The correct choice is B. A design principle in which a class is built using instances of other classes as components, forming a 'has-a' relationship.. Read the options below, commit to one, then use the explanation to see why that choice holds and why the others do not.
Object-Oriented Programming (OOP) items like this one are written for Pakistan exams such as CSS, FPSC, PPSC, and NTS. The difficulty label is a hint about how much of the topic the stem assumes, not a score. Tags and exam names, when they are present, tell you where else the same idea is tested. Previous and next links stay in Object-Oriented Programming (OOP) so you can continue the subject. Related questions point at nearby stems if you want another angle on the same idea.
Treat the explanation as part of the question, not a footnote. If you missed it, reread the stem against the correct option before you open the next Object-Oriented Programming (OOP) item. A timed quiz is the same pool with a clock and a score. A past paper is a full sitting rather than this single question.
- A. The process by which objects communicate with one another by invoking each other's methods.
Why not A: “The process by which objects communicate with one another by invoking each other's methods.” does not fit this question. The answer is A design principle in which a class is built using instances of other classes as components, forming a 'has-a' relationship..
- B. A design principle in which a class is built using instances of other classes as components, forming a 'has-a' relationship. ✓
- C. The practice of restricting direct access to an object's internal data to protect it from unintended interference.
Why not C: “The practice of restricting direct access to an object's internal data to protect it from unintended interference.” does not fit this question. The answer is A design principle in which a class is built using instances of other classes as components, forming a 'has-a' relationship..
- D. A special method automatically invoked when an object is destroyed, used to release resources.
Why not D: “A special method automatically invoked when an object is destroyed, used to release resources.” does not fit this question. The answer is A design principle in which a class is built using instances of other classes as components, forming a 'has-a' relationship..
Correct answer
B. A design principle in which a class is built using instances of other classes as components, forming a 'has-a' relationship.
Explanation
A design principle in which a class is built using instances of other classes as components forming a 'has-a' relationship is the value that answers What is Composition primarily used for option B Option A The process by which objects communicate with one another by invoking each other's methods does not fit this question Option C The practice of restricting direct access to an object's internal data to protect it from unintended interference does not fit this question Option D A special method automatically invoked when an object is destroyed used to release resources does not fit this question For this Object-Oriented Programming OOP question the accepted answer is A.
Source: Object-Oriented Programming (OOP) Official Reference Guide
Tags: computer science, oop, object-oriented programming, software design
Submitted by: MCQsHub Editorial
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