[Solved] You have a tree structure where each node can be either a single element or a composite containing multiple children.... Which design pattern best suits this requirement? | OOP & Design Patterns

OOP & Design Patterns - Iterator & Composite Pattern - Traversal Abstractions

You have a tree structure where each node can be either a single element or a composite containing multiple children. You want to traverse all elements uniformly without exposing the internal structure of the tree. Which design pattern best suits this requirement?

AVisitor Pattern to separate operations from object structure

BFactory Pattern to create different node types

CIterator & Composite Pattern to provide uniform traversal abstraction

DSingleton Pattern to ensure a single traversal instance

Step-by-Step Solution

Solution:

Step 1: Understand the problem requirements
The problem requires traversing a tree with composite and leaf nodes uniformly without exposing internals.
Step 2: Match requirements to pattern capabilities
The Iterator & Composite Pattern provides a uniform traversal interface hiding internal structure, ideal for this scenario.
Final Answer:
Option C -> Option C
Quick Check:
Traversal abstraction without exposing internals -> Iterator & Composite Pattern [OK]

Quick Trick: Uniform traversal of composites -> Iterator & Composite Pattern [OK]

Common Mistakes:

MISTAKES

Confusing Visitor with traversal abstraction
Choosing Singleton for traversal
Using Factory for traversal logic

Trap Explanation:

PITFALL

Candidates often confuse Visitor (operation separation) with Iterator (traversal abstraction).

Interviewer Note:

CONTEXT

Tests candidate's ability to recognize appropriate design patterns for traversal abstraction.

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Solution Trace

More OOP & Design Patterns Quizzes

Which design pattern best suits this requirement?

Step 1: Understand the problem requirements

Step 2: Match requirements to pattern capabilities

Final Answer:

Quick Check:

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