Lecture 34 Quiz: Design Patterns — Factory & Strategy

Note

Review before quiz: Lectures | Week 11 Content | Lab 8

Lecture 34 Self-Check

Question 1: The Factory pattern belongs to which Gang of Four category?

Select an item

A. Behavioral — it swaps algorithms at runtime

B. Structural — it composes objects together

C. Creational — it centralises and abstracts object creation

D. Concurrency — it manages thread-safe object creation

Question 2: What is the core intent of the Factory pattern?

Select an item

A. The caller decides which concrete class to instantiate using new

B. A factory method or class handles object creation so the caller only uses the interface

C. The database returns the correct object type based on a query

D. Spring annotations automatically apply the factory pattern to all classes

Question 3: The Strategy pattern belongs to which Gang of Four category?

Select an item

A. Creational — it manages how objects are created

B. Structural — it adds new capabilities to existing objects

C. Behavioral — it defines a family of algorithms that can be swapped at runtime

D. Concurrency — it synchronises access to shared resources

Question 4: How do Spring's core features map to the Factory and Strategy patterns?

Select an item

A. JdbcTemplate implements Factory; @Autowired implements Strategy

B. BeanFactory/ApplicationContext implements Factory; injecting a strategy interface via DI implements Strategy

C. @Component scanning implements Strategy; @Bean implements Factory

D. Spring does not implement either pattern internally

Question 5: A Sorter class holds a reference to a SortStrategy interface and delegates sort() to it — QuickSort and MergeSort are interchangeable implementations. Which pattern is this?

Select an item

A. Factory pattern — it has multiple sort algorithms that can be selected at runtime

B. Singleton pattern — only one sorter instance should exist

C. Observer pattern — other objects are notified when sorting completes

D. Template Method pattern — the sorting steps are fixed in a base class