Cracking the Code: My Challenging Hash Table Interview at Wanderlog for 软件工程师实习

Software Engineering
1

wanderlog | Software Engineer Intern | Interview Experience

Interview Date: Not specified
Result: Fail
Difficulty: Hard

Interview Process

The interview consisted of an online coding assessment.

Technical Questions

  1. Transaction Record Statistics

    • Topic: Hash Table, Sorting
    • Assessment Focus: Frequency counting using HashMap, custom sorting (descending order by frequency, ascending order by name).
    • Approach: Use a HashMap to record occurrences and sort the output according to specified rules. Key pitfalls include the direction of the sorting comparator and the output format.

  2. Log Time Matching

    • Topic: String Parsing, Hash Mapping
    • Assessment Focus: String parsing, hash mapping, and time difference evaluation.
    • Approach: Each log entry is formatted as “id time action.” The goal is to track sign-in and sign-out times, filtering users based on time differences. Attention is required for output sorting, time difference boundaries, and input reading order.

Tips & Insights

  • Pay close attention to sorting requirements and output formats to avoid common pitfalls.