Problem database last updated: June 20, 2025

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Celigo Coding Interview Questions

2 problems · 1 Easy, 0 Medium, 1 Hard · Ranked #406 of 458

Difficulty breakdown

1 Easy

50% · avg 23%

0 Medium

0% · avg 59%

1 Hard

50% · avg 18%

Top topics

array
50%
hash-table
50%2.2x
string
50%1.8x

Interview profile

Based on 2 reported problems, Celigo interviews are significantly harder than average - 50% Hard vs 18% across all companies.

The most common topics are array (50%), hash-table (50%), string (50%). Problems below are sorted by frequency, the ones at the top are asked most often.

All 2 problems

First Missing Positive

Solve

Given an unsorted integer array nums. Return the smallest positive integer that is not present in nums.

HardVery Likely
arrayhash-table

Reformat Date

Solve

Given a date string in the form Day Month Year, where:

EasyVery Likely
string

How often are these problems asked?

Frequency scores are based on crowdsourced interview reports. A higher score means the problem has been reported more often in recent Celigo interviews.

Very Likely

75-100%

Likely

50-74%

Sometimes

25-49%

Rare

0-24%

Preparing for your Celigo coding interview

Celigo interviews focus heavily on array, hash-table, string problems. If you're short on time, these are the categories to prioritize. The problems on this page are sorted by frequency, so start from the top and work your way down.

Beyond solving problems, practice explaining your approach. Celigo interviewers care about your thought process - how you break down a problem, consider edge cases, and evaluate tradeoffs between solutions. A clean O(n) solution you can explain clearly beats an O(log n) solution you can't articulate.

Looking for more companies? Browse all 458 companies in our directory, or sharpen your fundamentals with our free data structure visualizers and AI-powered DSA tutor.

Frequently Asked Questions

What coding problems does Celigo ask in interviews?add

Celigo has been reported to ask 2 distinct coding problems. The most common topics are array, hash-table, string. 1 are Easy difficulty, 0 are Medium, and 1 are Hard. Problems are sorted by frequency - the ones at the top are asked most often.

How hard are Celigo coding interviews?add

Based on 2 reported problems, Celigo interviews are significantly harder than average - 50% Hard vs 18% across all companies. 0% of questions are Medium difficulty. Focus on the high-frequency Medium problems first, then work through the Hard ones.

How should I prepare for a Celigo coding interview?add

Start with the highest-frequency problems listed on this page. Focus on the core topics: array, hash-table, string. Practice solving them under time pressure and explaining your approach out loud. Mock interviews with AI can simulate the real experience.

Other companies to explore

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