[Solved] Why should class variables be declared private in Java? — Ans: To prevent direct access and protect data integrity | Java

Java - Encapsulation

Why should class variables be declared private in Java?

ATo allow other classes to modify them freely

BTo prevent direct access and protect data integrity

CTo make the variables static

DTo improve program speed

Step-by-Step Solution

Solution:

Step 1: Understand private access modifier
Declaring variables private restricts access only to the class itself, preventing outside code from changing them directly.
Step 2: Identify the benefit
This protects the data from unintended changes, maintaining integrity.
Final Answer:
To prevent direct access and protect data integrity -> Option B
Quick Check:
Private variables protect data = True [OK]

Quick Trick: Private variables hide data from outside classes [OK]

Common Mistakes:

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Why should class variables be declared private in Java?