IBM vs Expedia: Interview Question Comparison

When preparing for technical interviews, understanding company-specific patterns is crucial. IBM and Expedia, while both major tech employers, present distinct interview landscapes in terms of volume, difficulty, and focus. This comparison analyzes their question profiles to help you strategize your preparation.

Question Volume and Difficulty

The data reveals a significant difference in the sheer number of questions associated with each company.

IBM has a much larger pool of 170 questions, categorized as Easy (52), Medium (102), and Hard (16). This high volume, with a strong emphasis on Medium-difficulty problems, suggests that IBM's interview process likely draws from a broad set of algorithmic challenges. Preparing for IBM means covering extensive ground, with the expectation that you can reliably solve a wide variety of medium-level problems under interview conditions.

Expedia has a more focused set of 54 questions, with a breakdown of Easy (13), Medium (35), and Hard (6). The concentration is also on Medium difficulty, but the total count is less than one-third of IBM's. This indicates a more targeted interview question bank. Success here requires deep mastery of a smaller core set of topics and problem patterns, rather than broad, shallow knowledge.

In short, IBM tests for breadth and stamina across many problems, while Expedia tests for depth and precision on a curated list.

Topic Overlap

Both companies emphasize fundamental data structures, but with a key divergence in secondary focus.

Core Overlap (Array & String): Both IBM and Expedia heavily feature Array and String problems. These are the bedrock of coding interviews. You must be proficient in all basic operations, slicing, and iterative patterns for these structures.

# Example: A common array problem (Two Sum variant)
def find_pair(nums, target):
    seen = {}
    for i, num in enumerate(nums):
        complement = target - num
        if complement in seen:
            return [seen[complement], i]
        seen[num] = i
    return []

Diverging Focus:

• IBM's Additional Core: Two Pointers and Sorting. This points to a strong preference for problems involving efficient traversal and ordering. Think of questions like merging sorted arrays, finding a triplet sum, or detecting palindromes.
• Expedia's Additional Core: Hash Table and Greedy. The hash table focus aligns with optimization and lookup problems (e.g., frequency counting, first unique character). The Greedy tag is particularly telling, indicating a liking for problems where a locally optimal choice leads to a global solution (e.g., activity selection, task scheduling).

Which to Prepare for First

Your choice depends on your goals and timeline.

Prepare for IBM first if: You are early in your interview preparation cycle and want to build a comprehensive foundation. The vast number of Medium-difficulty questions will force you to learn a wide array of techniques. The skills gained from covering IBM's list—especially in Two Pointers and Sorting—are highly transferable and will make you a stronger candidate for many other companies, including Expedia. It's the broader, more foundational set.

Prepare for Expedia first if: You are short on time or have an interview scheduled soon. The smaller, more focused question set allows for intensive, repeated practice. Master the core Array/String problems and then drill deeply into Hash Table and Greedy patterns. This targeted approach can yield high ROI for a specific Expedia interview. However, this focused prep might leave gaps for a company like IBM with a wider scope.

A logical hybrid strategy is to use Expedia's list for deep, topic-focused practice (especially on Greedy and Hash Table problems), then expand to IBM's larger set for breadth and stamina building. This ensures you develop both depth in key areas and the versatility to handle unexpected questions.

For detailed question lists and patterns, visit the company pages: IBM and Expedia.