Question:
Which design concept allows internal code change without affecting the behaviour?
Which design concept allows internal code change without affecting the behaviour?
Show Hint
Refactoring = Change the internal structure
without
Changing external behavior.
Updated On: Jun 25, 2026
- Refactoring
- Coupling
- Cohesion
- Modularity
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The Correct Option is A
Solution and Explanation
Concept:
Software quality can be improved by restructuring code while preserving its external behavior.
This process is called Refactoring.
Step 1: Understand Refactoring.
Refactoring means:
• Improving code structure
• Removing duplication
• Improving readability
• Enhancing maintainability without changing program functionality.
Step 2: Analyze other options.
Coupling measures dependency among modules. Cohesion measures relatedness within a module. Modularity divides software into independent modules. None specifically refers to changing internal code while preserving behavior.
Step 3: Select the answer.
Hence, \[ \boxed{\text{Refactoring}} \] is correct.
Step 1: Understand Refactoring.
Refactoring means:
• Improving code structure
• Removing duplication
• Improving readability
• Enhancing maintainability without changing program functionality.
Step 2: Analyze other options.
Coupling measures dependency among modules. Cohesion measures relatedness within a module. Modularity divides software into independent modules. None specifically refers to changing internal code while preserving behavior.
Step 3: Select the answer.
Hence, \[ \boxed{\text{Refactoring}} \] is correct.
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