Expedia vs Coupang: Interview Question Comparison

When preparing for technical interviews at major tech companies, understanding their specific question patterns and difficulty distributions is crucial for efficient study. Both Expedia and Coupang present significant coding challenges, but their profiles differ in notable ways. This comparison analyzes their question volume, difficulty breakdown, and core topics to help you tailor your preparation strategy.

Question Volume and Difficulty

The total number of cataloged questions is nearly identical: 54 for Expedia and 53 for Coupang. The major difference lies in their difficulty distributions.

Expedia leans significantly toward easier problems: 54 questions (E13/M35/H6). This means roughly 70% of their questions are Medium difficulty, with a substantial portion (24%) being Easy. Only about 11% are Hard. This suggests Expedia's interviews may focus more on assessing solid foundational knowledge, clean code, and problem-solving approach rather than on solving extremely complex algorithmic puzzles.

Coupang has a much steeper curve: 53 questions (E3/M36/H14). Here, Easy questions are rare (less than 6%), while Mediums make up about 68%. The key differentiator is the Hard category, which comprises roughly 26% of questions—more than double Expedia's proportion. This indicates Coupang's process likely places a higher premium on advanced algorithmic mastery and the ability to handle optimization and edge cases under pressure.

Topic Overlap

Both companies heavily test three fundamental data structures: Array, String, and Hash Table. Mastery of these is non-negotiable for either interview.

# Example: A common Hash Table problem (Two Sum)
def two_sum(nums, target):
    seen = {}
    for i, num in enumerate(nums):
        complement = target - num
        if complement in seen:
            return [seen[complement], i]
        seen[num] = i
    return []

The critical divergence is in the fourth most frequent topic. Expedia shows a notable focus on Greedy algorithms. These problems test your ability to make locally optimal choices at each step to reach a global solution, often involving sorting and iteration.

Coupang emphasizes Dynamic Programming (DP). This is a more advanced paradigm requiring the breakdown of problems into overlapping subproblems and storing their results. The high frequency of Hard questions at Coupang is often linked to complex DP scenarios like knapsack variations, string DP, or state machine DP.

# Example: A classic DP problem (Climbing Stairs)
def climbStairs(n):
    if n <= 2:
        return n
    dp = [0] * (n + 1)
    dp[1], dp[2] = 1, 2
    for i in range(3, n + 1):
        dp[i] = dp[i-1] + dp[i-2]
    return dp[n]

Which to Prepare for First

If you are early in your interview preparation journey, start with Expedia's profile. The higher volume of Easy and Medium problems allows you to build confidence and reinforce core concepts in Arrays, Strings, and Hash Tables. Practicing Greedy algorithms is generally more approachable than diving deep into DP. Successfully tackling this set will create a strong foundation.

You should prioritize Coupang's profile if you are already comfortable with Medium-level problems and need to level up. The preparation requires a dedicated deep dive into Dynamic Programming patterns and a willingness to grind through more Hard problems. Mastering Coupang's question set will inherently cover the core topics needed for Expedia, making you well-prepared for both, but the reverse is less true.

Ultimately, your choice should align with your current skill level and timeline. Solidify your basics first, then tackle advanced topics.

For more detailed question lists and patterns, visit the Expedia and Coupang question pages: Expedia Interview Questions | Coupang Interview Questions