# IC2
**Role:** Software Engineer · **Level:** Interim Software Engineer
**Company:** [Yahoo](https://scaleengineer.com/companies/yahoo)
**Difficulty:** Medium
**Salary:** US$100000 - US$130000
**Experience:** 2 - 4
**Timeline:** ~7 days
The IC2 Interim Software Engineer interview at Yahoo is designed to assess a candidate's foundational software engineering skills, problem-solving abilities, and cultural fit within the company. This role typically requires 2-4 years of relevant experience. The interview process is structured to evaluate technical proficiency, coding best practices, and the ability to collaborate effectively within a team.
Canonical: https://scaleengineer.com/interviews/yahoo/interim-software-engineer-software-engineer
---
## Overall evaluation

- Technical Skills
- Communication
- Behavioral and Cultural Fit

## Questions asked

- Write a function to reverse a linked list.
- Given an array of integers, find the two numbers that add up to a specific target.
- Explain the difference between a process and a thread.
- Describe a situation where you had to debug a complex issue.
- How would you design a URL shortener service?
- Tell me about a time you failed and what you learned from it.
- What are your strengths and weaknesses as a software engineer?
- How do you stay updated with new technologies?

## Preparation tips

### lists

- Review fundamental data structures (arrays, linked lists, trees, graphs, hash maps) and algorithms (sorting, searching, graph traversal).
- Practice coding problems on platforms like LeetCode, HackerRank, or Coderbyte, focusing on medium-difficulty problems.
- Understand time and space complexity (Big O notation).
- Prepare to discuss your past projects in detail, highlighting your contributions and technical challenges.
- Familiarize yourself with object-oriented programming (OOP) principles.
- Review common software development concepts like version control (Git), testing, and debugging.
- Prepare for behavioral questions using the STAR method (Situation, Task, Action, Result).
- Research Yahoo's products, services, and company culture.
- Prepare thoughtful questions to ask the interviewer about the role, team, and company.

### studyPlan

- {"title":"Data Structures and Algorithms Fundamentals","longDescription":"Weeks 1-2: Focus on core data structures (Arrays, Linked Lists, Stacks, Queues, Hash Tables) and basic algorithms (Sorting, Searching). Practice implementing these from scratch and analyze their time/space complexity. Solve 10-15 medium LeetCode problems related to these topics.","shortDescription":"Weeks 1-2: Data Structures & Basic Algorithms. Practice 10-15 medium LeetCode problems."}
- {"title":"Advanced Data Structures and Algorithms","longDescription":"Weeks 3-4: Dive into more advanced data structures like Trees (Binary Trees, BSTs, Tries) and Graphs. Study graph traversal algorithms (BFS, DFS) and common graph problems. Also, cover dynamic programming basics. Solve 10-15 medium LeetCode problems.","shortDescription":"Weeks 3-4: Advanced DS (Trees, Graphs) & DP. Practice 10-15 medium LeetCode problems."}
- {"title":"System Design Basics","longDescription":"Week 5: Focus on system design fundamentals. Understand concepts like scalability, availability, load balancing, and database choices. Review common system design interview patterns. Prepare to discuss a simple system design scenario.","shortDescription":"Week 5: System Design Fundamentals. Review common patterns."}
- {"title":"Behavioral and Cultural Fit","longDescription":"Week 6: Prepare for behavioral questions. Identify key projects from your resume and prepare STAR method stories for common behavioral themes (teamwork, challenges, failures, successes). Research Yahoo's values and prepare questions.","shortDescription":"Week 6: Behavioral Prep & Company Research. Prepare STAR stories."}
- {"title":"Mock Interviews and Final Review","longDescription":"Week 7: Mock interviews. Practice coding problems under timed conditions and simulate the interview experience. Get feedback from peers or mentors. Review any weak areas identified during practice.","shortDescription":"Week 7: Mock Interviews & Review. Practice coding under pressure."}

## Location differences

- {"location":"Sunnyvale, CA","differences":{"tips":["Research Yahoo's presence and projects in this specific region.","Be prepared to discuss how your experience aligns with local team needs.","Practice articulating your thoughts clearly and concisely."],"interviewFocus":["Adaptability to local team dynamics","Understanding of regional market trends (if applicable)","Communication style in a specific cultural context"],"commonQuestions":["Describe a challenging bug you fixed and your approach.","How do you ensure code quality and maintainability?","Tell me about a time you had to work with a difficult teammate."]}}
- {"location":"New York, NY","differences":{"tips":["Brush up on data structures and algorithms.","Be ready to walk through your past projects in detail.","Prepare questions about the team's current projects and challenges."],"interviewFocus":["Technical depth in core areas","Problem-solving approach","Collaboration and teamwork"],"commonQuestions":["How do you approach learning new technologies quickly?","Describe a project where you had to optimize performance.","What are your thoughts on agile development methodologies?"]}}
- {"location":"Austin, TX","differences":{"tips":["Prepare STAR method answers for behavioral questions.","Show enthusiasm for Yahoo's mission and values.","Ask thoughtful questions about career growth opportunities."],"interviewFocus":["Behavioral aspects and cultural fit","Communication and interpersonal skills","Motivation and long-term potential"],"commonQuestions":["How do you handle ambiguity in project requirements?","Tell me about a time you disagreed with a technical decision.","What are your career aspirations in the next 3-5 years?"]}}

## Round 1: Data Structures and Algorithms
**Type:** Technical Interview (Coding) · **Difficulty:** Medium · **Duration:** 45 min
Solve 1-2 coding problems focusing on data structures and algorithms.
This round focuses on your core technical skills. You will be asked to solve one or two coding problems, typically involving data structures and algorithms. The interviewer will assess your ability to understand the problem, devise an efficient solution, write clean and correct code, and explain your reasoning throughout the process. Expect to discuss time and space complexity.
**Interviewers look for:** Solid understanding of data structures and algorithms.; Ability to translate a problem into working code.; Clear communication of thought process.; Attention to edge cases and error handling.
**Evaluation criteria:** Correctness of the solution; Efficiency of the solution (time and space complexity); Code clarity and readability; Ability to test the code; Problem-solving approach
**Common rejection reasons:** Inability to solve basic coding problems.; Poor understanding of fundamental data structures and algorithms.; Difficulty explaining thought process.; Lack of attention to detail in code.
## Questions

- Given a string, find the length of the longest substring without repeating characters.
- Implement a function to check if a binary tree is a Binary Search Tree (BST).

## Preparation tips

- Practice coding problems on platforms like LeetCode, focusing on medium difficulty.
- Be prepared to explain your approach and complexity analysis.
- Think out loud and communicate your thought process clearly.
- Write clean, well-structured code.
- Consider edge cases and how to handle them.

## Round 2: System Design
**Type:** System Design Interview · **Difficulty:** Medium · **Duration:** 45 min
Discuss the high-level design of a scalable system.
This round assesses your ability to think about system design at a high level. You'll be given a broad problem (e.g., design a Twitter feed, a URL shortener) and asked to outline a potential solution. The focus is on understanding requirements, identifying core components, discussing trade-offs, and considering scalability and reliability. You are not expected to provide a fully detailed, production-ready design, but rather demonstrate your thought process.
**Interviewers look for:** Basic understanding of how to design scalable systems.; Ability to break down a problem into smaller components.; Awareness of common design patterns and technologies.; Thoughtful consideration of trade-offs.
**Evaluation criteria:** Understanding of scalability and performance.; Ability to identify key components of a system.; Consideration of trade-offs (e.g., consistency vs. availability).; Clarity of design explanation.; Handling of potential bottlenecks.
**Common rejection reasons:** Lack of understanding of basic system design principles.; Inability to articulate trade-offs in design choices.; Overly simplistic or overly complex design.; Poor communication of design ideas.
## Questions

- Design a system to shorten URLs like bit.ly.
- How would you design a basic news feed for a social media platform?

## Preparation tips

- Study common system design concepts (load balancing, caching, databases, APIs).
- Review popular system design interview case studies.
- Practice designing simple systems like a URL shortener or a basic social media feed.
- Focus on explaining your design choices and the trade-offs involved.
- Be prepared to discuss different database options (SQL vs. NoSQL).

## Round 3: Behavioral and Managerial Fit
**Type:** Behavioral and Managerial Interview · **Difficulty:** Medium · **Duration:** 30 min
Discuss behavioral aspects, teamwork, and career goals.
This round is typically conducted by the hiring manager and focuses on your behavioral aspects, career aspirations, and overall fit with the team and Yahoo's culture. You'll be asked questions about your past experiences, how you handle challenges, your strengths and weaknesses, and why you're interested in Yahoo. This is also an opportunity for you to ask questions about the team, projects, and work environment.
**Interviewers look for:** Cultural fit and positive attitude.; Ability to work effectively in a team.; Motivation and passion for software engineering.; Good communication skills.; Self-awareness and ability to learn from experiences.
**Evaluation criteria:** Alignment with Yahoo's values.; Teamwork and collaboration potential.; Motivation and career goals.; Communication and interpersonal skills.; Problem-solving approach in non-technical scenarios.
**Common rejection reasons:** Lack of enthusiasm or interest in the role/company.; Poor communication or interpersonal skills.; Inability to provide specific examples for behavioral questions.; Mismatch with team culture or values.; Unrealistic salary expectations.
## Questions

- Tell me about a time you had a conflict with a colleague and how you resolved it.
- What motivates you as a software engineer?
- Describe a challenging project you worked on and how you overcame obstacles.

## Preparation tips

- Prepare STAR method answers for common behavioral questions.
- Research Yahoo's mission, values, and recent news.
- Be ready to articulate why you want to work at Yahoo and on this specific team.
- Show enthusiasm and a positive attitude.
- Prepare thoughtful questions to ask the hiring manager.