TikTok vs Expedia: Interview Question Comparison

When preparing for technical interviews, company-specific question patterns reveal what skills they prioritize. TikTok and Expedia, while both assessing core data structures and algorithms, present distinct challenges in volume, difficulty, and focus. Understanding these differences helps you allocate your preparation time strategically.

Question Volume and Difficulty

The sheer scale of TikTok's question bank is its most defining characteristic. With 383 questions reported, it dwarfs Expedia's 54 questions. This volume indicates a highly competitive process where you might encounter a wider variety of problems, making pattern recognition less predictable.

The difficulty distribution further highlights the intensity of TikTok's technical bar:

• TikTok (E42/M260/H81): Medium and Hard questions constitute 89% of its catalog. The significant portion of Hard questions (81) signals an expectation to solve complex optimization problems under interview conditions.
• Expedia (E13/M35/H6): The focus is overwhelmingly on Medium difficulty (65% of questions), with only a small number of Hard problems. This suggests a strong emphasis on foundational competency and clean implementation rather than advanced algorithmic gymnastics.

In short, TikTok's process is a marathon of challenging problems, while Expedia's is a focused sprint on core concepts.

Topic Overlap

Both companies heavily test fundamental data structures, as seen in their top topics: Array, String, and Hash Table. This is the universal bedrock of coding interviews.

The key differentiator lies in their advanced focuses:

• TikTok's fourth most frequent topic is Dynamic Programming (DP). This aligns with its high volume of Hard questions, as DP is a classic method for testing optimization and state management in complex scenarios.
• Expedia's fourth topic is Greedy algorithms. This suggests a practical focus on problems where a locally optimal choice leads to a global solution, often encountered in real-world scheduling, resource allocation, and trip optimization logic relevant to a travel company.

This divergence means your deep-dive topics should differ. For TikTok, mastering DP patterns (0/1 knapsack, LCS, etc.) is non-negotiable. For Expedia, proficiency in identifying when a greedy approach is applicable is crucial.

# Example: A Greedy problem (Expedia's focus)
def max_meetings(start, end):
    meetings = sorted(zip(start, end), key=lambda x: x[1])
    count, last_end = 0, 0
    for s, e in meetings:
        if s >= last_end:
            count += 1
            last_end = e
    return count

# Example: A DP problem (TikTok's focus)
def coin_change(coins, amount):
    dp = [float('inf')] * (amount + 1)
    dp[0] = 0
    for i in range(1, amount + 1):
        for coin in coins:
            if i - coin >= 0:
                dp[i] = min(dp[i], dp[i - coin] + 1)
    return dp[amount] if dp[amount] != float('inf') else -1

Which to Prepare for First

Your preparation order should be dictated by your interview timeline and the principle of progressive overload.

Prepare for Expedia first if you are early in your interview practice. Its question set is a perfect training ground. Mastering its core Array, String, Hash Table, and Greedy problems will build a strong foundation. Solving most of its 54 questions is a feasible and confidence-boosting milestone.

Prepare for TikTok only after you have a robust foundation. Treat it as an advanced tier of study. The vast number of Medium and Hard questions, especially in DP, requires you to be very comfortable with fundamentals before tackling them efficiently. Use TikTok's problems to stress-test your skills and improve your performance under pressure.

Ultimately, a solid Expedia-level preparation is a subset of what's needed for TikTok. Starting with Expedia's focused list builds competency; expanding to TikTok's extensive catalog builds mastery.

For detailed question lists and patterns, visit the company pages: TikTok Interview Questions and Expedia Interview Questions.