Amazon vs Cisco: Interview Question Comparison

When preparing for technical interviews at major tech companies, understanding the specific focus areas and difficulty distribution can significantly streamline your study process. Amazon and Cisco, while both requiring strong algorithmic problem-solving skills, present distinct interview landscapes in terms of volume, difficulty, and topic emphasis. This comparison breaks down their key differences to help you prioritize your preparation effectively.

Question Volume and Difficulty

The most immediate difference is the sheer scale of the question banks. Amazon's list, with 1,938 questions, is vastly larger than Cisco's 86 questions. This reflects Amazon's reputation for a rigorous, data-driven interview process with a deep pool of problems.

The difficulty distribution also differs:

• Amazon (E530/M1057/H351): The majority of questions are categorized as Medium (1,057), with a significant number of Hard (351) and Easy (530) problems. This spread indicates that while foundational knowledge is tested, candidates must be exceptionally proficient at solving complex, multi-step problems under pressure.
• Cisco (E22/M49/H15): The distribution follows a similar pattern but on a much smaller scale, with Medium-difficulty questions also forming the core (49). The number of Hard questions (15) is proportionally smaller than Amazon's, suggesting a slightly less intense focus on the most advanced algorithmic challenges.

This contrast means preparing for Amazon requires grinding through a much larger set of potential problems to build pattern recognition. Cisco preparation, while still demanding, can be more focused on mastering a core set of concepts.

Topic Overlap

Both companies heavily test fundamental data structures and algorithms. The core overlapping topics are Array, String, and Hash Table problems. Mastery of these is non-negotiable for either interview.

The key divergence lies in their secondary focuses:

• Amazon prominently features Dynamic Programming (DP). The presence of 351 Hard questions often correlates with complex DP problems involving optimization, counting, or decision-making across states. Success here requires dedicated practice on DP patterns like knapsack, LCS, or state machine DP.
• Cisco shows a notable emphasis on Two Pointers. This technique is crucial for solving efficient array and string manipulation problems (e.g., sliding window, searching for pairs, in-place modifications). While DP may appear, the listed topic focus suggests it's less of a central pillar.

# Example: Two Pointers (common for Cisco)
def remove_duplicates(nums):
    if not nums:
        return 0
    i = 0
    for j in range(1, len(nums)):
        if nums[j] != nums[i]:
            i += 1
            nums[i] = nums[j]
    return i + 1

# Example: Dynamic Programming (common for Amazon)
def coin_change(coins, amount):
    dp = [float('inf')] * (amount + 1)
    dp[0] = 0
    for coin in coins:
        for x in range(coin, amount + 1):
            dp[x] = min(dp[x], dp[x - 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 company's demands.

Prepare for Cisco first if: You are interviewing with Cisco sooner, or you are building your foundational skills. The smaller, more focused question bank allows you to achieve coverage and confidence more quickly. Solidifying core topics like Arrays, Strings, Hash Tables, and Two Pointers provides an excellent base that is directly transferable.

Prepare for Amazon first if: Amazon is your primary target, or you have more lead time. The vast question pool and emphasis on Dynamic Programming require a longer, more intensive study period. Mastering Amazon's problem set will inherently cover nearly all of Cisco's core topics, making subsequent Cisco preparation largely a review process, potentially with a quick focus on Two Pointers technique refinement.

In essence, Cisco preparation is a strong subset of Amazon preparation. Starting with Amazon's broader and deeper curriculum is the more comprehensive strategy if you have the time.

For further details, explore the specific question lists and topic breakdowns on the company pages: Amazon Interview Questions and Cisco Interview Questions.