Course Roadmap
Last Updated: January 12, 2026
1 min read
This course covers lot of ground: object-oriented fundamentals, design principles, design patterns, and common LLD interview questions.
Use the filters below to tailor your prep by difficulty and experience level.
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18 sections173 chapters
Classes and ObjectsExercise: Classes and ObjectsEnumsExercise: EnumsInterfacesExercise: InterfacesEncapsulationExercise: EncapsulationAbstractionExercise: AbstractionInheritanceExercise: InheritancePolymorphismExercise: PolymorphismQuiz: OOP Fundamentals
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Beginner
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Medium
Beginner
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Beginner
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Beginner
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Beginner
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High
Beginner
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Beginner
High
DRY PrincipleExercise: DRY PrincipleKISS PrincipleExercise: KISS PrincipleYAGNI PrincipleExercise: YAGNI PrincipleLaw of DemeterExercise: Law of DemeterSeparation of ConcernsExercise: Separation of ConcernsCoupling and CohesionExercise: Coupling and CohesionComposing Objects PrincipleExercise: Composing Objects PrincipleQuiz: Design Principles
High
Beginner
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Beginner
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Intermediate
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Intermediate
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Intermediate
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Low
Intermediate
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