Infosys vs Coupang: Interview Question Comparison

When preparing for technical interviews, understanding the specific focus and expectations of each company can dramatically improve your efficiency. Infosys and Coupang represent two distinct ends of the spectrum: a global IT services giant and a high-growth e-commerce "tech tiger." Their interview question profiles reflect their different business models and hiring needs. This comparison breaks down the key differences in question volume, difficulty, and topic emphasis to help you tailor your preparation.

Question Volume and Difficulty

The most immediate difference is sheer volume. Based on aggregated data, Infosys has a much larger pool of documented questions (158 vs. Coupang's 53). This suggests Infosys interviews may pull from a broader, more established set of problems, potentially increasing the variety you might encounter.

The difficulty distribution also tells a story:

• Infosys (E42/M82/H34): The majority of questions are Medium difficulty (82), with a significant number of Easy (42) and a solid chunk of Hard (34). This spread indicates a balanced assessment, likely testing for fundamental competency and problem-solving across levels.
• Coupang (E3/M36/H14): The profile is heavily skewed toward Medium (36) and Hard (14) problems, with very few Easy (3). This signals a focus on evaluating strong algorithmic chops and the ability to handle complex scenarios, consistent with its reputation as a technically rigorous product-based company.

Topic Overlap

Both companies emphasize core computer science fundamentals, but with subtle priority shifts.

Shared Core: Array, String, and Dynamic Programming (DP) are top topics for both. Mastering these is non-negotiable for either interview. Problems often involve manipulation, traversal, and optimization.

Key Differences:

• Infosys includes Math as a top category. Expect more problems involving number theory, combinatorics, or mathematical logic.
• Coupang lists Hash Table as a primary topic. This highlights the importance of efficient data lookup and frequency counting for their problems, which often underpin optimal solutions for array and string challenges.

Here is a typical two-sum style problem, common at both companies, solved using a hash table for efficiency:

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 []

# Example
print(two_sum([2, 7, 11, 15], 9))  # Output: [0, 1]

Which to Prepare for First

Your choice depends on your target and timeline.

Prepare for Infosys first if: You are early in your interview preparation journey. The larger volume and inclusion of more Easy problems provide a wider field for practicing core concepts across difficulties. Succeeding here builds a solid, generalist foundation in data structures and algorithms that is transferable.

Prepare for Coupang first if: You are aiming for top-tier tech roles and want to stress-test your skills. The high concentration of Medium and Hard problems demands deeper mastery and optimized solutions. Focusing here first will push you to a higher performance bar, making subsequent preparation for companies like Infosys feel more manageable. Prioritize deep practice on array/string problems using hash tables and dynamic programming.

Regardless of order, use the shared focus on Arrays, Strings, and DP as your anchor. For Infosys, add dedicated math practice. For Coupang, ensure you can instinctively reach for hash-based optimizations.

For detailed question lists and patterns, visit the company pages: Infosys and Coupang.