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Top 50 loops Interview Questions

The most frequently asked loops questions across all roles and companies, ranked by real interview frequency. Updated daily.

50questions
~17htotal time
138companies covered
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1
loopsStart here. 13 questions · ~264 min
FizzBuzzEasy
Practice
Recently asked

Generate the FizzBuzz sequence for numbers 1 through n using modulo checks.

loopsUltra MobileSSAP ConcurLeepfrog Technologies
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2
Basic Algorithms10 questions · ~203 min
Generate Fibonacci SeriesEasy
Practice
Recently asked

Generate the first n Fibonacci numbers using an iterative algorithm.

Basic AlgorithmsloopsCCC Intelligent SolutionsMississippi StaffingPersistent
Linked List Reverse or CycleEasy
Practice

Detect whether a People workflow's linked sequence contains a cycle using Floyd's fast and slow pointers.

Basic AlgorithmsLinked ListsloopsPeopleMedpaceEPAM Systems
Prime Numbers Between 1 and 100Easy
Practice

Find every prime number from 1 through 100 using trial division.

Basic AlgorithmsMathloopsAAzentio SoftwareIntelliswift SoftwareNewgen Software
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3
Recursion5 questions · ~102 min
Fibonacci Iterative vs RecursiveEasy
Practice
Recently asked

Generate all Fibonacci values up to a limit using iterative and recursive techniques, then compare their implementation trade-offs.

RecursionBasic AlgorithmsloopsTennessee StaffingWashington StaffingEncore Capital Group
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4
network requests3 questions · ~61 min
Client-Side API Rate LimiterMedium
Practice

Use a queue to enforce a sliding-window client-side API rate limiter over request timestamps.

network requestsloopscachingRedditStatkraftRivian
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5
Coding3 questions · ~61 min
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6
More topics16 questions · ~325 min
Reverse Words in SentenceMedium
Practice
Recently asked

Reverse each word's characters while preserving the sentence's word order using a linear scan.

coding challengeBasic AlgorithmsStringsAmerican AirlinesPocket FmBBestPeers Infosystem
Reverse Without Built-InsEasy
Practice

Reverse a string or array in linear time using two pointers without built-in reverse operations.

ArraysStringsloopsAbzoobaSentinelOneLpl Financial
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