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Yahoo·Software Engineer·Technical Phone Screen·Intermediate

Intermediate
May 2026

Summary

Interviewed for a SWE role at Yahoo and got asked a pretty standard OOP question. Nothing too wild, felt like a warmup more than a real technical deep dive.

Questions Asked (1)

Q1

What is Object Oriented Programming (OOP)?

Technical Trade-offs
Author's notes

Gave the usual rundown of encapsulation, inheritance, polymorphism, abstraction.

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AI HintsAI Generated

Suggested Approach

Start with a clear, concise definition of OOP, then explain its four core principles (encapsulation, abstraction, inheritance, polymorphism) with brief examples. Finally, connect OOP to real-world software engineering benefits like modularity, reusability, and maintainability, and mention trade-offs to show depth.

Pro tip: Demonstrate maturity by acknowledging that OOP is a tool, not a silver bullet—mention when other paradigms (e.g., functional programming) might be better, and tie your answer to Yahoo's scale and need for maintainable systems.

1. Define OOP

Give a one-sentence definition: a programming paradigm based on the concept of 'objects' that contain data and methods.

2. Explain core principles

Briefly describe encapsulation, abstraction, inheritance, and polymorphism, using simple examples like a 'Car' class.

3. Highlight benefits

Discuss how OOP promotes modularity, code reuse, and easier maintenance, which are crucial for large-scale systems.

4. Discuss trade-offs

Mention potential downsides like increased complexity, performance overhead, and when other paradigms might be more suitable.

5. Relate to role and company

Connect OOP to Yahoo's engineering challenges, such as building scalable, maintainable services, and show awareness of their tech stack.

Key Points to Mention

  • Encapsulation: bundling data and methods, and restricting access to internals.
  • Abstraction: hiding complex implementation details behind simpler interfaces.
  • Inheritance: creating new classes from existing ones to promote code reuse.
  • Polymorphism: allowing objects of different types to be treated as instances of a common superclass.
  • Benefits: modularity, reusability, maintainability, and scalability.
  • Trade-offs: potential over-engineering, performance overhead, and suitability for different problem domains.

AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.