Goldman Sachs vs Cisco: Interview Question Comparison

When preparing for technical interviews at top companies, understanding their specific focus areas can dramatically increase your efficiency. Goldman Sachs and Cisco, while both prestigious, present distinct challenges in their coding interviews. Goldman Sachs, a leading investment bank, emphasizes algorithmic problem-solving with a high volume of questions, whereas Cisco, a major networking hardware company, focuses on a more curated set of core data structure problems. A strategic preparation plan should account for their differences in volume, difficulty, and topic emphasis.

Question Volume and Difficulty

The sheer volume of questions associated with each company is the most striking difference. Goldman Sachs has a tagged pool of approximately 270 questions, significantly larger than Cisco's pool of about 86 questions. This suggests that Goldman Sachs interviews draw from a broader, more diverse set of problems, requiring candidates to be prepared for more variations.

The difficulty distribution also differs:

• Goldman Sachs (E51/M171/H48): The majority of questions are categorized as Medium (171), with a substantial number of Hard (48). This indicates a strong emphasis on complex problem-solving, often involving multi-step logic or optimization.
• Cisco (E22/M49/H15): The distribution skews towards Medium difficulty (49) as well, but with fewer Hard problems. The overall smaller pool and reduced hard count suggest a focus on assessing solid foundational skills and clean implementation over solving the most esoteric algorithms.

This data implies that acing Cisco requires mastery of core concepts, while succeeding at Goldman Sachs demands both that mastery and the stamina to tackle a wider range of challenging problems under pressure.

Topic Overlap

Both companies heavily test fundamental data structures. Array, String, and Hash Table problems form the common core for both interview processes. Mastery of these topics is non-negotiable for either company.

The key differentiator lies in the advanced topics:

• Goldman Sachs explicitly lists Dynamic Programming (DP) as a top topic. DP problems are classic medium-to-hard challenges that test a candidate's ability to recognize optimal substructure and formulate efficient, often non-intuitive, solutions.
• Cisco highlights Two Pointers as a key technique. This pattern is frequently used for solving problems on sorted arrays or strings (e.g., finding pairs, removing duplicates, checking palindromes) and is considered a crucial tool for writing efficient, in-place solutions.

This means your preparation should branch after mastering the shared fundamentals. For Cisco, deep dive into two-pointer and sliding window variations. For Goldman Sachs, you must allocate significant time to understanding DP patterns, from classic problems like knapsack or longest common subsequence to more applied ones.

# Example: Two Pointer (relevant 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 (relevant for Goldman Sachs)
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

Prepare for Cisco first. Its smaller, more focused question bank centered on Arrays, Strings, Hash Tables, and Two Pointers provides an excellent foundation. Conquering this core set will build your confidence and fluency with essential patterns. This foundation is 100% transferable and constitutes a significant portion of what you'll see at Goldman Sachs.

Once you are comfortable with Cisco's core topics, transition to Goldman Sachs preparation. Use your established foundation as a springboard to tackle their larger volume of questions. Dedicate the bulk of your additional study time to Dynamic Programming and practicing a higher number of Medium and Hard problems to build endurance. This sequential approach ensures you build depth before breadth, making your study time for the more demanding Goldman Sachs interview more efficient.

For targeted practice, visit the Goldman Sachs and Cisco question lists: Goldman Sachs | Cisco