[Solved] You need to design a system where a fixed sequence of steps is... Which design approach best ensures code reuse and enforces the sequence while allowing subclasses to customize specific steps? | OOP & Design Patterns

OOP & Design Patterns - Template Method Pattern - Define Skeleton, Override Steps

You need to design a system where a fixed sequence of steps is followed to prepare different types of beverages, but some steps vary depending on the beverage type. Which design approach best ensures code reuse and enforces the sequence while allowing subclasses to customize specific steps?

AImplement separate classes with duplicated code for each beverage type.

BApply a greedy algorithm to select steps dynamically at runtime based on beverage type.

CUse a base class defining the skeleton of the algorithm with abstract methods for variable steps, overridden by subclasses.

DUse a brute force approach that tries all possible step sequences and picks the correct one.

Step-by-Step Solution

Step 1: Identify the problem structure
The problem requires a fixed sequence of steps with some steps varying by subclass.
Step 2: Match to design pattern
The Template Method Pattern defines a skeleton algorithm in a base class and lets subclasses override specific steps, ensuring reuse and consistent sequence.
Final Answer:
Option C -> Option C
Quick Check:
Base class controls sequence; subclasses customize steps [OK]

Quick Trick: Fixed sequence with customizable steps -> Template Method [OK]

Common Mistakes:

MISTAKES

Thinking duplicated code is acceptable for reuse
Confusing dynamic step selection with greedy algorithms

Trap Explanation:

PITFALL

Greedy or brute force approaches seem flexible but don't enforce fixed step order or reuse.

Interviewer Note:

CONTEXT

Tests if candidate recognizes Template Method pattern from problem description.

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More OOP & Design Patterns Quizzes

Which design approach best ensures code reuse and enforces the sequence while allowing subclasses to customize specific steps?

Step 1: Identify the problem structure

Step 2: Match to design pattern

Final Answer:

Quick Check:

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