Course contents

Java One-Stop Interview Prep

01Java Fundamentals
Module overview
02Core Java & OOP
Module overview
03Collections & Generics
Module overview
04Functional Java (8+)
Module overview
05Multithreading & Concurrency
Module overview
06JVM Internals & Memory
Module overview
07Java Performance Engineering
Module overview
08Java I/O & NIO
Module overview
09Modern Java (17 → 21+)
Module overview
10Design Patterns & SOLID
Module overview
1. SOLID principles
  1. The Java LLD rulebook
  2. Single responsibility
  3. Open/closed
  4. Liskov substitution
  5. Interface segregation
  6. Dependency inversion
  7. Interview questions & scenariosInterview
2. Creational patterns
  1. Thread-safe singleton
  2. Factory method
  3. Abstract factory
  4. Builder
  5. Prototype
  6. Interview questions & scenariosInterview
3. Structural patterns
  1. Adapter
  2. Decorator
  3. Proxy
  4. Composite
  5. Facade
  6. Interview questions & scenariosInterview
4. Behavioural patterns
  1. Strategy
  2. Observer
  3. Command
  4. Template method
  5. Chain of responsibility
  6. State
  7. Interview questions & scenariosInterview
5. Patterns in practice
  1. Design patterns in the JDK
  2. Anti-patterns
  3. Interview questions & scenariosInterview
6. Module interview question bank
  1. Complete interview question bankBank
11Real-world Java & Interview Arsenal
Module overview
12Last-Mile Java: What You Can't Skip Before the Interview
Module overview

Module 10

Design Patterns & SOLID

SOLID and the classic design patterns in idiomatic Java, including the patterns hiding in the JDK.

Premium4 free lessons5 topics30 lessons & question sets1 ready

By the end of this module you can

Apply each SOLID principle with a concrete refactor
Implement and compare the core design patterns

SOLID principles

Each principle with before-and-after code.

The Java LLD rulebookFree guide · already liveFree
Single responsibilityLessonFreeSoon
Open/closedLessonPremiumSoon
Liskov substitutionLessonPremiumSoon
Interface segregationLessonPremiumSoon
Dependency inversionLessonPremiumSoon
SOLID principles: interview questions & scenariosInterview Q&APremiumSoon

Creational patterns

Creating objects the right way.

Thread-safe singletonLessonFreeSoon
Factory methodLessonPremiumSoon
Abstract factoryLessonPremiumSoon
BuilderLessonPremiumSoon
PrototypeLessonPremiumSoon
Creational patterns: interview questions & scenariosInterview Q&APremiumSoon

Structural patterns

Composing classes and objects.

AdapterLessonPremiumSoon
DecoratorLessonPremiumSoon
ProxyLessonPremiumSoon
CompositeLessonPremiumSoon
FacadeLessonPremiumSoon
Structural patterns: interview questions & scenariosInterview Q&APremiumSoon

Behavioural patterns

Communication between objects.

StrategyLessonFreeSoon
ObserverLessonPremiumSoon
CommandLessonPremiumSoon
Template methodLessonPremiumSoon
Chain of responsibilityLessonPremiumSoon
StateLessonPremiumSoon
Behavioural patterns: interview questions & scenariosInterview Q&APremiumSoon

Patterns in practice

Patterns in the JDK and anti-patterns to avoid.

Design patterns in the JDKLessonPremiumSoon
Anti-patternsLessonPremiumSoon
Patterns in practice: interview questions & scenariosInterview Q&APremiumSoon

Finish the module

Module interview question bank

Every interview question worth practising for Design Patterns & SOLID, grouped by topic, with model answers, how to say them and what-if follow-ups.

Being written: it grows as the topics in this module are finished

PremiumSoon