Pattern Design Study Guide 2026
Everything you need to pass the Pattern Design exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📚 Pattern Design Topics to Study (21)
✍️ Sample Pattern Design Questions & Answers
1. The Class Adapter pattern uses ________ while the Object Adapter uses ________.
A Class Adapter inherits from both the target interface and the adaptee, while an Object Adapter wraps (composes) an instance of the adaptee.
2. Which creational pattern is commonly used for parsing configuration files into complex domain objects?
The Builder pattern is ideal for constructing complex objects like configuration models step-by-step from parsed input.
3. Which technique used in concurrent data structures divides the structure into independent segments, each guarded by its own lock, to reduce contention?
Lock Striping partitions a data structure (e.g., a hash map) into stripes, each with its own lock, so threads operating on different stripes can proceed concurrently without blocking each other.
4. What problem does the Singleton pattern primarily solve?
Singleton solves the problem of having multiple conflicting instances by ensuring only one instance is created and shared globally.
5. Extract Method refactoring is applied when:
Extract Method improves readability by pulling a code fragment into a well-named method, making the original method shorter and easier to understand.
6. The 'Golden Hammer' anti-pattern occurs when:
Golden Hammer describes over-reliance on a known tool or pattern, applying it even when it is inappropriate — 'if all you have is a hammer, everything looks like a nail.'