Infosys vs ServiceNow: Interview Question Comparison

When preparing for technical interviews at large technology companies, understanding the specific focus areas and difficulty distribution of each company's question bank can dramatically improve your preparation efficiency. Both Infosys and ServiceNow are major players, but their interview processes, as reflected in their coding question profiles, have distinct characteristics. This comparison analyzes the volume, difficulty, and topic emphasis of their common interview questions to help you tailor your study plan.

Question Volume and Difficulty

The most immediate difference is the sheer number of questions. Infosys's list is significantly larger at 158 questions, compared to ServiceNow's 78 questions. This suggests that Infosys interviews may draw from a broader pool of problems, or that their process involves a wider variety of question types across different teams and roles.

The difficulty distribution reveals another key strategic point:

• Infosys (E42/M82/H34): The difficulty is relatively balanced, with a strong emphasis on Medium questions (82 out of 158). The number of Easy questions (42) is also substantial, indicating a foundational screening layer. The 34 Hard questions show they do assess advanced problem-solving.
• ServiceNow (E8/M58/H12): The focus is overwhelmingly on Medium difficulty (58 out of 78). They have very few Easy questions (8) and a moderate number of Hard ones (12). This profile suggests ServiceNow interviews dive quickly into core algorithmic challenges, expecting candidates to be comfortable with medium-complexity problems from the start.

Preparation Implication: For ServiceNow, you should prioritize mastering Medium-difficulty problems across core topics. For Infosys, while Mediums are crucial, you must also ensure speed and accuracy on Easy problems and be prepared for a wider range of Hard scenarios.

Topic Overlap

Both companies heavily test Array and String manipulation, which are fundamental to algorithmic interviewing. Dynamic Programming (DP) also appears in both lists, confirming its status as a critical topic for any serious interview prep.

The key divergence is in the fourth most frequent topic:

• Infosys lists Math. This includes number theory, probability, and other mathematical puzzles, which aligns with the company's broad engineering services base.
• ServiceNow lists Hash Table. This points to a strong emphasis on problems involving efficient lookups, frequency counting, and data association—skills highly relevant to platform and data management development.

Here’s a typical pattern where this difference might manifest:

# Infosys-style "Math" problem: Count Primes
def countPrimes(n: int) -> int:
    if n <= 2:
        return 0
    is_prime = [True] * n
    is_prime[0] = is_prime[1] = False
    for i in range(2, int(n ** 0.5) + 1):
        if is_prime[i]:
            for j in range(i*i, n, i):
                is_prime[j] = False
    return sum(is_prime)

Which to Prepare for First

Your preparation priority should be guided by your target company and timeline.

If your goal is ServiceNow, your path is more focused. Drill deeply into Array, String, Hash Table, and Dynamic Programming problems at the Medium level. A strong performance here is paramount. You can use the smaller question bank to your advantage, aiming for comprehensive mastery.

If your goal is Infosys, your preparation must be broader. You need the same core topics (Array, String, DP) but must also allocate significant time to Math problems and ensure fluency across all difficulty levels. The larger question bank means practicing a higher volume of problems is beneficial.

For a generalist preparing for both or unsure of the target, start with the ServiceNow focus areas. Mastering Arrays, Strings, Hash Tables, and Medium-difficulty DP will build an excellent foundation that covers the majority of Infosys's core topics as well. Once that foundation is solid, you can then expand your study to include the additional Math problems and a wider range of question difficulties needed for Infosys. This approach ensures you build depth in the most critical, overlapping areas first.

For detailed question lists and patterns, visit the Infosys and ServiceNow company pages: Infosys Interview Questions | ServiceNow Interview Questions