Top 23
Prep plan
Updated weekly · Last refresh Aug 30
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Protium Software Engineer Interview Questions

The questions to prepare for a Protium Software Engineer interview. Questions from real interview reports rank first. Updated weekly.

23questions
~3htotal time
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1
CodingStart here. 7 questions · ~62 min
Longest Substring Without RepeatsMedium
Practice

Find the longest substring with all unique characters using a sliding window.

Hash TablesStringsTwo PointersPProtium
Explain Solution Time ComplexityEasy

Explain how to analyze an algorithm’s time and space complexity and justify the result from the code structure.

Hash TablesSearchingSortingPProtium
Trapping Rain WaterMedium

Tests algorithmic problem-solving on a classic dynamic programming or two-pointer problem.

Dynamic ProgrammingPProtium
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2
System Design4 questions · ~36 min
Design a URL Shortening ServiceHard

Design a URL shortening service that routes, ranks, and monitors links at scale.

Feature StoreModel ServingPProtium
Building a RESTful APIMedium

Evaluates API design decisions, implementation workflow, and tradeoffs.

system designPProtium
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3
SQL & Data Manipulation5 questions + 3 drills · ~75 min
ACID vs BASE in Distributed DatabasesMedium

Explain how ACID and BASE differ in consistency, availability, and scaling trade-offs in distributed databases.

BASEdistributed databasesACIDPProtium
Normalization and PerformanceMedium

Assesses database design tradeoffs between normalization and query performance.

normalizationdata integrityPProtium
Deadlock Handling in TransactionsHard

Evaluates strategies to detect, prevent, and recover from deadlocks in databases.

PProtium
Top 5% Customers by ChannelMedium
Practice
Practice drill

Use CTEs and percentile-style ranking to find the top 5% of customers by 30-day transaction volume within each marketing channel.

Window FunctionsDate FunctionsRankingCapital OneWells FargoCredit Saison India
Reverse Rows in a DataFrameMedium
Practice
Practice drill

Reverse each Protium loan's repayment events using ROW_NUMBER while preserving chronological row details.

pandassqlPProtium
Top N by Group SalaryEasy
Practice
Practice drill

Use a join and ROW_NUMBER to return the top N salaries in one Meta department.

JoinsRankingdatabase queryingMeta
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4
Behavioral & Leadership7 questions · ~62 min
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The finish line: interview-readyComplete all 23 questions plus 3 hands-on drills to finish this plan.