Scale Engineer

Junior SDE

Software EngineerP4Medium

This interview process is designed to assess candidates for a Junior Software Engineer (P4) position at Alibaba. It evaluates technical proficiency, problem-solving skills, and cultural fit.

Rounds·3

Timeline·~14d

Experience·1 - 3 yrs

Comp band·US$70000 - US$90000

Interview time·135 min

Evaluation

What they measure.

  • Problem-solving ability
  • Algorithmic thinking
  • Code quality and efficiency
  • Understanding of data structures

Preparation

How to prepare.

Tips

  1. Review fundamental data structures (arrays, linked lists, trees, graphs, hash maps) and algorithms (sorting, searching, dynamic programming, graph traversal).
  2. Practice coding problems on platforms like LeetCode, focusing on medium-difficulty problems.
  3. Understand core computer science concepts like operating systems, databases, and networking.
  4. Prepare to discuss your past projects in detail, focusing on your contributions and the challenges you faced.
  5. Research Alibaba's products, services, and company culture.
  6. Practice behavioral questions using the STAR method (Situation, Task, Action, Result).

Study plan

Fig · Study plan — 04 phases

01 / 04
01

Phase 01 of 04

Data Structures

Weeks 1-2: Data Structures (Arrays, Lists, Trees, Hash Tables). Practice implementations and complexity analysis.

Weeks 1-2: Focus on Data Structures. Cover arrays, linked lists, stacks, queues, trees (binary trees, BSTs, AVL trees), heaps, and hash tables. Practice implementing these structures and solving problems related to them. Understand their time and space complexity.

Questions

Commonly 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 deal with a difficult stakeholder.
  • How would you design a URL shortening service?
  • What is polymorphism?
  • Tell me about a time you failed and what you learned from it.
  • How do you approach debugging a performance issue?

Locations

Regional differences.

Fig · Regions — 03 locations

01 / 03

Location

Hangzhou

Interview focus

Adaptability to new environmentsTeamwork and collaboration skillsProactiveness in learning

Common questions

  • Tell me about a challenging project you worked on in your previous internship.
  • How do you handle conflicting feedback from different team members?
  • Describe a time you had to learn a new technology quickly for a project.

Tips

  • Research Alibaba's recent projects and initiatives in the region.
  • Be prepared to discuss your experiences in a multicultural team setting.
  • Highlight any contributions to open-source projects or personal coding projects.

Rounds

Round-by-round.

Expand a step for evaluation criteria, sample questions, and prep notes.

DSA

Coding questions at Alibaba.

Frequently reported on Alibaba loops

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Other guides

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