Samsung·Data Scientist·Technical Phone Screen·Intermediate

Intermediate

Jun 2026

Summary

Samsung Data Scientist interview with a fermi estimation question about laptop counts in a corporate office. Pretty classic back-of-envelope stuff but the details they wanted made it trickier than expected.

Questions Asked (1)

Roughly how many laptops are physically present in a typical corporate office at any given moment? Walk through your assumptions, clarify what you're counting as a laptop, and give both a point estimate and a reasonable range.

Product Analytics & MetricsAdaptability & Ambiguity

Author's notes

I started with headcount and worked outward, which felt right, but I almost forgot about the hybrid work piece entirely.

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AI HintsAI Generated

Suggested Approach

Break the problem into a top-down estimation: start with the number of employees in a typical corporate office, adjust for those who are in the office at any given moment (accounting for remote work, meetings, etc.), and then estimate the number of laptops per present employee (typically one, but some may have two or none). Clarify what counts as a laptop (e.g., work-issued devices, personal laptops used for work) and state assumptions explicitly. Provide a point estimate and a range based on sensitivity to key assumptions.

Pro tip: Anchor your estimate to a familiar reference point (e.g., a typical office floor or a company you know) and explicitly state that the goal is to demonstrate structured reasoning, not to hit an exact number. This shows you can handle ambiguity and communicate assumptions clearly.

1. Clarify definitions and scope

Define what qualifies as a laptop (e.g., work-issued devices, personal devices used for work) and what 'physically present' means (e.g., in the building, not in transit). Specify the type of corporate office (e.g., tech company, size).

2. Estimate total employees in the office

Assume a typical corporate office size (e.g., 500 employees) or derive from building capacity. Consider that not all employees are in the office at once due to remote work, travel, or leave; estimate an occupancy rate (e.g., 60-80%).

3. Estimate laptops per present employee

Most employees have one work laptop, but some may have a second device (e.g., for testing, personal use) or none (e.g., using desktops). Estimate an average multiplier (e.g., 1.1 laptops per person).

4. Calculate point estimate and range

Multiply employees present by laptops per person to get a point estimate. Then vary assumptions (e.g., occupancy rate, laptops per person) to produce a reasonable range (e.g., ±20%).

5. Sanity-check and communicate

Verify the estimate against known benchmarks (e.g., laptops per square foot, industry norms). Clearly state assumptions and how they affect the result, and emphasize the range over the point estimate.

Key Points to Mention

Definition of a laptop: work-issued vs. personal, and whether tablets/2-in-1s count.
Occupancy rate: not all employees are in the office simultaneously; consider hybrid work policies.
Laptops per employee: typically one, but some may have multiple or none (e.g., shared devices).
Assumptions about office size and employee density (e.g., square footage per employee).
Sensitivity analysis: how changes in assumptions affect the final range.
Communication: clearly state that the goal is to demonstrate logical reasoning, not to find an exact answer.

AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.