Microsoft vs Epam Systems: Interview Question Comparison

When preparing for technical interviews, understanding the specific focus of each company can dramatically improve your efficiency. Microsoft and Epam Systems represent two distinct ends of the spectrum in terms of interview preparation scope. Microsoft, a global tech giant, has a massive, well-documented question bank, while Epam, a leading digital platform engineering services company, has a more concentrated set of problems. A strategic approach to their question patterns is key.

Question Volume and Difficulty

The difference in volume is the most striking factor. With over 1,350 questions tagged on platforms like LeetCode, Microsoft's question bank is vast and deep. The difficulty distribution (379 Easy, 762 Medium, 211 Hard) indicates a strong emphasis on Medium-level problems, which form the core of their on-site interviews. Preparing for Microsoft requires a broad and rigorous practice regimen to cover a wide array of problem variations.

In stark contrast, Epam Systems has a much smaller curated list of around 51 questions. The distribution (19 Easy, 30 Medium, 2 Hard) shows a clear focus on fundamental problem-solving, with Medium difficulty being the primary target. The low number of Hard questions suggests their interviews are less likely to include highly complex, obscure algorithms and more likely to test solid implementation of core concepts on moderately challenging problems.

# Example of a classic Medium-difficulty array problem common to both.
def maxSubArray(nums):
    current_max = global_max = nums[0]
    for num in nums[1:]:
        current_max = max(num, current_max + num)
        global_max = max(global_max, current_max)
    return global_max

Topic Overlap

Both companies heavily test Array and String manipulation, as these are foundational to most software engineering tasks. Hash Table is also a critical common topic, essential for optimizing lookups and solving frequency-counting problems.

The key difference lies in their secondary focuses. Microsoft's list shows a significant emphasis on Dynamic Programming (DP), a topic known for its difficulty. DP questions are a staple in Microsoft interviews for testing optimal substructure and memoization thinking. Epam's list highlights Two Pointers as a core technique. This indicates a practical focus on efficient in-place array/string operations, sliding windows, and problems involving sorted data—techniques extremely relevant for backend and data processing roles common at service-oriented firms.

Which to Prepare for First

Start with Epam Systems. Its smaller, more focused question set allows you to build confidence by mastering a concise list of fundamentals. Achieving proficiency with Epam's list ensures you have a strong command of arrays, strings, hash tables, and two-pointer techniques—a solid foundation for any interview.

After solidifying this base, transition to Microsoft preparation. Use the core skills from Epam prep as a springboard. Then, expand your study to include the wider variety of problems, with dedicated time for mastering Dynamic Programming patterns and tackling a larger number of Medium and Hard problems. This sequential approach—from focused fundamentals to broad mastery—is the most efficient path if you are targeting both companies or similar tiers in the industry.

For targeted practice, visit the company pages: /company/microsoft and /company/epam-systems.