Airbnb vs eBay: Interview Question Comparison

When preparing for technical interviews at major tech companies, understanding their specific question patterns and focus areas can significantly increase your efficiency. Airbnb and eBay, while both prominent in the tech landscape, present distinct interview profiles in terms of difficulty distribution and topic emphasis. A strategic preparation plan should account for these differences.

Question Volume and Difficulty

The overall question volumes are similar, with Airbnb's database containing 64 questions and eBay's containing 60. The key differentiator lies in the difficulty breakdown.

Airbnb (64 questions: Easy 11, Medium 34, Hard 19) has a notably higher proportion of challenging problems. Nearly 30% of its catalog is classified as Hard, indicating that interviews are likely to test complex algorithmic thinking, intricate edge cases, and optimized solutions. The large Medium set forms the core of their assessment.

eBay (60 questions: Easy 12, Medium 38, Hard 10) presents a more moderate difficulty curve. With only about 17% Hard questions, the interview focus appears to be heavily weighted toward solid proficiency with Medium-difficulty problems. The emphasis is likely on robust, clean implementation of standard algorithms rather than on solving esoteric, highly complex puzzles.

This suggests that for Airbnb, you must dedicate substantial time to mastering advanced patterns and Hard problems. For eBay, a deep and fluent command of Medium-level questions across core topics will be more critical.

Topic Overlap

Both companies heavily test the fundamental building blocks of algorithms. The top topics are nearly identical:

• Array
• String
• Hash Table

This strong overlap means that foundational preparation is highly transferable. Mastering operations on arrays and strings, and leveraging hash tables for efficient lookups and state management, is essential for both.

The primary divergence is in the secondary focus areas:

• Airbnb prominently lists Dynamic Programming (DP). This aligns with their higher Hard-question count, as DP problems often constitute a significant portion of challenging algorithm interviews. Expect problems involving optimization, counting, or decision-making across sequences or states.
• eBay highlights Sorting. This indicates a focus on problems where data organization, searching within sorted structures (binary search), or using sorting as a key preprocessing step is central. While sorting is a fundamental concept, its explicit mention suggests it's a frequent theme.

Here is a typical pattern where the focus might differ. A problem might involve finding a pair of elements:

# eBay-style: Might emphasize sorting + two pointers
def twoSumSorted(numbers, target):
    l, r = 0, len(numbers) - 1
    while l < r:
        current_sum = numbers[l] + numbers[r]
        if current_sum == target:
            return [l + 1, r + 1]  # 1-indexed
        elif current_sum < target:
            l += 1
        else:
            r -= 1
    return []

# Airbnb-style: Could evolve into a DP variant
# e.g., "Find number of ways to reach target with given numbers"
def combinationSum4(nums, target):
    dp = [0] * (target + 1)
    dp[0] = 1
    for i in range(1, target + 1):
        for num in nums:
            if i - num >= 0:
                dp[i] += dp[i - num]
    return dp[target]

Which to Prepare for First

Start with eBay. Its lower concentration of Hard problems and strong focus on Array, String, Hash Table, and Sorting provides an excellent foundation. Achieving consistency and speed on Medium problems here will build the core algorithmic muscle needed for any interview.

After solidifying the eBay profile, transition to Airbnb preparation. This step involves layering on the additional complexity. Specifically, you must drill into Dynamic Programming problems (starting with classical ones like knapsack, longest increasing subsequence, and edit distance) and practice decomposing complex, often narrative-heavy Hard problems into solvable algorithms. The skills gained from eBay prep will be directly applicable, but you will need to extend them further.

In summary, use eBay's profile to build your foundation and Airbnb's to stress-test and advance your problem-solving to a higher level of difficulty.

For focused practice, visit the Airbnb question list and the eBay question list.