OOP & Design Patterns - Encapsulation - Data Hiding, Getters/Setters & Access Modifiers
Trace the sequence of events when a client tries to update a private field via a setter method in an encapsulated class.
Trace the sequence of events when a client tries to update a private field via a setter method in an encapsulated class.
easy🧠🧾 Concept Trace Q12 of Q15
Step-by-Step Solution
Step 1: Identify encapsulation flow
Private fields cannot be accessed directly; setters provide controlled access.Step 2: Follow setter method process
Setter receives input, validates it, updates the private field, then returns control.Step 3: Analyze incorrect options
The client directly modifies the private field without any method call violates data hiding. The getter method is called first to check the current value before updating misuses getter before setter. The private field is copied to a public variable which the client modifies breaks encapsulation by exposing private data.Final Answer:
Option C -> Option CQuick Check:
Setters control updates with validation, preserving encapsulation.
Quick Trick: Setters validate and update private data, not direct access [OK]
Common Mistakes:
MISTAKES- Assuming direct field access through setters
- Confusing getter and setter roles
- Thinking private data is copied out for modification
Trap Explanation:
PITFALL- Options A and D ignore encapsulation rules; C confuses method roles.
Interviewer Note:
CONTEXT- Checks understanding of controlled access flow via setters.
Master "Encapsulation - Data Hiding, Getters/Setters & Access Modifiers" in OOP & Design Patterns
Want More Practice?
15+ quiz questions · All difficulty levels · Free
Free Signup - Practice All QuestionsMore OOP & Design Patterns Quizzes